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Journal articles on the topic 'Combining ability'

Author: Grafiati

Published: 4 June 2021

Last updated: 15 June 2025

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1

Pritika, Neupane. "Estimation of general combining ability, specific combining ability and heterosis among selected rice (Oryza sativa L.) genotypes." World Journal of Advanced Research and Reviews 16, no. 2 (2022): 167–80. https://doi.org/10.5281/zenodo.7784863.

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Rice is the most important cereal crop and is primary source of calorie for Nepalese. Though, few rice varieties have been released for cultivation among farmers, most of them are low yielding so are not preferred by the farmers. So, broadening the genetic base of rice is an important intervention that can be done to increase productivity. Thus, an experiment was conducted to estimate general combining ability, specific combining ability, and heterosis from three sets of crosses to find out best parents and their cross combinations. The set1 consists 2 lines and 4 testers, set2 consists 3 lines and 2 testers and set3 consists 2 lines and 2 testers respectively. Each set of parents were crossed in line X tester mating design with two replications to produce 18 F1. The analyzed data showed that all genotypic values were significant and showed maximum variations among the traits. When fertile grain number was considered Sukhadhan-2 was best parents and cross of Manjushree 2 X Samba Mahsuri Sub-1 and Himali X Taichung-176 were the best cross and for panicle length IR775- 39-80-2- 2-2 was obtained as best parent and the best cross was Khumal 8 X Sugandha- 2. Maximum heterosis was observed in Khumal 8 X Sukhadhan-2 for fertile grain number and Khumal -4 X Sugandha-2 for panicle length. Therefore, best parents could be utilized for creating best lines through hybridization and best cross combinations would work as best lines for further selection and evaluation. These lines might work as promising varieties for Nepal.

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2

Keimeso, Zeleke, and Demissew Abakemal. "Combining Ability of Highland Adapted Maize (Zea Mays. L) Inbred Lines For Desirable Agronomic Traits Under Optimum and Low Nitrogen Conditions." Journal of Science and Sustainable Development 8, no. 1 (2020): 1–13. https://doi.org/10.20372/au.jssd.8.1.2020.0138.

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Low soil nitrogen is among the most important abiotic stresses limiting maize production in the highlands of Ethiopia. Information on hybrid performance and combining ability of maize inbred lines for grain yield and agronomic traits under low nitrogen stress is crucial to design appropriate breeding strategies for the development of enhanced maize cultivars. The objective of the present study was to estimate combining abilities of double haploid (DH) maize inbred lines for grain yield and related traits under optimum nitrogen and low nitrogen (N stress) condition. A total of 36 diallel crosses generated by crossing nine maize DH lines using half diallel mating scheme and four standard checks were studied for different desirable agronomic traits during 2017 cropping season at Ambo optimum nitrogen and Low nitrogen environments. The genotypes were evaluated in alpha lattice design replicated twice in both environments. Analyses of variances showed significant mean squares due to crosses for most traits studied. At optimum nitrogen condition, the highest grain yield was obtained from crosses L4 x L8 (9.57 t ha-1), L4 x L7 (8.67 t ha-1), L1 x L3 (8.36 t ha-1), L6 x L8 (8.27 t ha-1) and L3 x L4 (8.00 t ha-1), whereas at low nitrogen condition, L2 × L4 (6.74 t ha-1) and L4 × L8 (5.15 t ha-1) were crosses with higher grain yield values. Mean squares due to general (GCA) and specific (SCA) combining abilities were significant for most of the traits under both conditions. This indicates that both additive and non-additive gene actions are important in the inheritance of these traits. Relatively larger GCA over SCA variances were observed in the current study for most studied traits revealing the predominance of additive gene action in controlling these traits. L3 and L8 were found as good combiners for grain yield at optimum N environment, whereas L2, L4 and L7 were good general combiners under low N stress condition. L4 and L8 were good combiners for grain yield in combine analysis across environments and hence were promising parents for hybrid cultivars development. Based on SCA effects, L1×L5, and L4×L7 were identified as promising hybrids for majority of traits studied in combined analysis across environments.

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3

Ravi, Kumar, Kumar Randhir, Kumar Amit, Kumar Sinha Saksham, and Kumari Preeti. "General and Specific Combining Ability for Nine Morphologic Characters in Round Brinjal (Solanum melongena L.)." British Journal of Applied Science & Technology 21, no. 2 (2017): 1–6. https://doi.org/10.9734/BJAST/2017/33727.

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A study was undertaken to estimate general and specific combining in brinjal through diallel analysis involving 6 parents. The combining ability analysis revealed highly significant differences among the treatments for all the parameters studied except days to 50% flowering and number of primary branches per plant. The genotype SBRB-6/12 was found best general combiner for number of fruit per plant and yield per plant. The top three crosses (SBRB-3/12 x SBRB-2/12, SBRB-6/12 x SBRB-3/12 and KS-224 x Swarna Mani) with high per se performance have exhibited high sca effects for yield. Both additive and non-additive gene actions were operating for all the characters except days to 50% flowering, fruit diameter and number of primary branches/plant. Therefore, the general combiner can be exploited for the creation of varieties lines, and the presence of specific combining in the hybrids.

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4

Thomson, NJ, and DJ Luckett. "Heterosis and combining ability effects on cotton. I. Combining ability." Australian Journal of Agricultural Research 39, no. 6 (1988): 973. http://dx.doi.org/10.1071/ar9880973.

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Combining ability for a number of yield and quality attributes of cultivated cotton (Gossypium) was studied in two diallel experiments under high-yielding conditions in northern Australia. The first diallel comprised nine G. hirsutum parents of North American and African origin, the second diallel of thirteen parents besides American and African cultivars also included an Indian line, some Australian lines and an American G. barbadense cultivar. Each set of hybrids was grown as a half-diallel (plus the parents), first as a plant crop and then as a ratoon crop in the following season. Generally variation due to general combining ability (GCA) was significant and substantial for all traits, although specific combining ability (SCA) was also significant. GCA was shown to be closely associated with parental performance per se which may, therefore, be used with good reliability in choosing parents for use in a breeding program. The plant and ratoon performances were very similar in most instances. The African cultivars together with some medium-quality American ones showed high combining ability for yield, but the best GCA for quality characters was found in the high- quality parents. The G. barbadense cultivar was exceptional in this regard, hut it had a low GCA for yield, and there are other technical problems associated in establishing good inbred lines from hybrids between the two cultivated tetraploid species. Genotypic correlations between a pair of traits were usually similar for the plant and its respective ratoon crop, but often quite different for the two diallel combinations. In both populations selection for increased lint yield would tend to be accompanied by adverse changes in some other important characteristics.

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5

Vivekanandan, P., and S. Giridharan. "General Combining Ability for Kernel Traits in Rice." International Rice Research Notes 20, no. 1 (1995): 4–5. https://doi.org/10.5281/zenodo.6822489.

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This article 'General Combining Ability for Kernel Traits in Rice' appeared in the International Rice Research Notes series, created by the International Rice Research Institute (IRRI) to expedite communication among scientists concerned with the development of improved technology for rice and rice-based systems. The series is a mechanism to help scientists keep each other informed of current rice research findings. The concise scientific notes are meant to encourage rice scientists to communicate with one another to obtain details on the research reported.

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6

Garcia, J. E., F. Dicenta, and E. A. Carbonell. "Combining Ability in Almond." Plant Breeding 112, no. 2 (1994): 141–50. http://dx.doi.org/10.1111/j.1439-0523.1994.tb00662.x.

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7

K.S, PARAMASIVAN. "COMBINING ABILITY IN RICE." Madras Agricultural Journal 77, september December (1990): 447–49. http://dx.doi.org/10.29321/maj.10.a01989.

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In rice, the variances of specific combining ability were higher than general combining ability for plant height, panicle length and grain yield per plant which indicated non additive gene action. The genotypes ADT 31 and Utrirajappan were found to be good general combiners for grain yield and their cross involving these two parents showed high sca effects.

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8

P, JAYAMALA, and RATHNASAMY R. "Combining ability in pigeonpea." Madras Agricultural Journal 87, september (2000): 418–22. http://dx.doi.org/10.29321/maj.10.a00488.

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Using combining ability studies line x tester analysis in pigeonpea revealed non-additive gene action for the expression of days to first flowering, days to 50 per cent flowering, number of branches per plant, plant height, number of pods per plant, days to maturity, number of seeds per pod and additive gene action for seed yield. Parents MS Prabhat DT and CORG 9060 were found to be good general combiners for days to MS Prabhat DT and CORG 9060 were found to be good general combiners for days to first flowering, days to 50 per cent flowering and days to maturity. For number of branches per plant, plant height, pods per plant and seed yield per plant, MS Co 5 and CORG 5 were the good combiners. The crosses MS Co 5 x ICPL 161 and MS Co 5 x CORG 5 were the best combinations for seed yield.

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9

Guimaraes, E. P. "Combining Ability of Upland Rice Progenitors." International Rice Research Newsletter 14, no. 1 (1989): 4–5. https://doi.org/10.5281/zenodo.7146403.

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This article 'Combining Ability of Upland Rice Progenitors' appeared in the International Rice Research Newsletter series, created by the International Rice Research Institute (IRRI). The primary objective of this publication was to expedite communication among scientists concerned with the development of improved technology for rice and for rice based cropping systems. This publication will report what scientists are doing to increase the production of rice in as much as this crop feeds the most densely populated and land scarce nations in the world.

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10

Ye., A. Kuzmenko, V. Pirych A., and V. Fedorenko M. "Estimation of parameters of genetic variation of spring durum wheat (Triticum durum Desf.) on the basis of "number of grains from the main spike"." Plant varieties studying and protection 18, no. 1 (2022): 34–41. https://doi.org/10.21498/2518-1017.18.1.2022.257585.

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<strong>Aim.</strong> To assess the combining ability, features and nature of the inheritance of the trait “number of grains from the main spike” in varieties of spring durum wheat for their further involvement in breeding programs. <strong>Methods. </strong>The investigations were carried out at the V. M. Remeslo Institute of Wheat of NAAS of Ukraine. Varieties (‘Zhizel’, ‘MIP Raiduzhna’, ‘Kharkivska 27’, ‘Kharkivska 39’, ‘Spadshchyna’, ‘Kuchumovka’, ‘Tera’) of domestic breeding were involved in crossings according to the full diallel scheme (7 ´ 7). Parental components and F<sub>1</sub> were studied in the field in 2016, 2017. <strong>Results. </strong>The analysis of variance of combining ability showed a significant advantage in general combining ability (GCA) effects. The mean square of the specific combining ability (SCA) was significantly inferior to the GCA, but was significant in both years of the study. Consistently high GCA effects in 2016, 2017 were determined in the variety ‘Tera’ (g<sub>i</sub> = 1.35; 2.37). Non-alelic gene interaction was not found, which made it possible to analyze the main parameters of genetic variation. In two years of investigations, in the phenotypic manifestation of the number of grains from the main spike, dominant effects (H<sub>1</sub> and H<sub>2</sub>) survived over additive ones (D). The average degree of dominance indicated overdominance (H<sub>1</sub>/D). The indicator of the average degree of dominance in loci () also indicated overdominance. Dominance was significantly oriented. Dominant effects of genes increased the number of grains, while recessive effects decreased them. At least one group of genes has been identified that has led to dominance. In general, dominant genes (F > 0) or groups of genes dominated quantitatively in cultivar investigated. A high coefficient of heritability in a broad sense (H<sup>2</sup> = 0.88; 0.90) indicates a significant phenotypic conditionality to genetic factors. The coefficient of heritability in a narrow sense (h<sup>2</sup> = 0.31; 0.38) indicates the average contribution of the additive effects of genes over the dominant ones. <strong>Conclusions.</strong> The identified breeding and genetic features on the basis of the “number of grains from the main spike” trait make it possible to predict the effectiveness of selections aimed at increasing the trait in the newly hybrid material. However, due to the predominance of dominant effects and overdominance in the genetic control of a trait, selection in later generations will be more effective. Varieties ‘Kharkivska 27’, ‘Kharkivska 39’ and ‘Tera’ should be used as genetic sources to increase the trait “number of grains from the main spike”.

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11

Satyanarayana, P. V., I. Kumar, and M. S. S. Reddy. "Studies on combining ability and heterosis in rice." International Rice Research Notes 23, no. 3 (1998): 10. https://doi.org/10.5281/zenodo.6947727.

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This article 'Studies on combining ability and heterosis in rice' appeared in the International Rice Research Notes series, created by the International Rice Research Institute (IRRI) to expedite communication among scientists concerned with the development of improved technology for rice and rice-based systems. The series is a mechanism to help scientists keep each other informed of current rice research findings. The concise scientific notes are meant to encourage rice scientists to communicate with one another to obtain details on the research reported.

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12

N, Vora Zarna, DR Mehta, Katariya Hitesh M, and Lata Raval. "Combining ability studies in Brinjal." International Journal of Chemical Studies 8, no. 2 (2020): 1525–32. http://dx.doi.org/10.22271/chemi.2020.v8.i2w.8978.

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13

Verma, RS, Narendra Pratap, DK Dubey, and SS Singh. "Combining Ability and Gene Action." SAARC Journal of Agriculture 11, no. 2 (2014): 117–27. http://dx.doi.org/10.3329/sja.v11i2.18407.

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The investigation was carried out to get information regarding magnitude of combining ability and nature of gene action for fruit yield and several other yield attributing traits following line × tester mating design involving 12 lines and 3 testers and their 36 hybrids tested in two environments viz., summer and rainy season 2010 at Research Farm of Department of Vegetable Science, N. D. University of Agriculture & Technology, Kumarganj, Faizabad, UP, India. From the estimate of gca effects, among the parental lines NDBT-13, NDBT-15 and NDBT-19 were identified as superior donor for both seasons and NDBT-10 for summer season and among the testers Kalyanpur Sona for summer season and Pusa Do Mausami for rainy season for fruit yield per plant and its yield contributing traits like number of fruits per plant and average fruit weight. Eight crosses displayed desirable significant sca effects in both seasons for fruit yield per plant. Among these eight crosses the best cross combinations based on desirable sca effects for fruit yield per plant were NDBT-19 × Pusa Do Mousami in summer season while NDBT-8 × Pusa Do Mousami, NDBT-15 × NDBT-12 and NDBT-10 × Pusa Do Mousami in rainy season. These crosses have more number of fruits per plant, average fruit weight, fruit diameter and other component traits in both seasons. DOI: http://dx.doi.org/10.3329/sja.v11i2.18407 SAARC J. Agri., 11(2): 117-127 (2013)

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14

Madke, Dr Vandana S., Dr S. A. Patil, Dr Ashwini A. Mankar, and KC Pardhi. "Combining ability analysis in lathyrus." International Journal of Advanced Biochemistry Research 8, no. 10 (2024): 497–500. http://dx.doi.org/10.33545/26174693.2024.v8.i10g.2513.

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15

R.H, PATEL, DESAI K.B, DESAI M.S, and PATEL K.G. "COMBINING ABILITY IN GRAIN SORGHUM." Madras Agricultural Journal 77, september December (1990): 528–30. http://dx.doi.org/10.29321/maj.10.a02016.

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A diallel set of 10 varieties of grain sorghum Sorghum bicolor (L.) Moench was studied to estimate the combining ability for yield and yield contributing traits. The sca variance was higher than gca variance for almost all the characters. Entry M-209 was better general combiner for earliness, GJ-35 for dwarfness, DMYT 231 for panicle length, DR 23, for grain yield and M-209 for stover yield. Hybrids GJ.- 36 x DR-20 and GJ-35 x DMYT-231 had high soa effect for days to 50% flowering, GJ-36 x DR-23 and GJ-35 x DMYT-231 for earliness, M-209 x DR3-1 and GJ-36 x DR-10 for dwarfness, GJ-35 x M-209 and GJ-35 x DR-10 for panicle length, GJ-36 x M-229 and M-211 x DR-10 for grain yield.

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16

C, SRINIVASAN, and VIJENDRA DAS L.D. "COMBINING ABILITY IN FODDER LABLAB." Madras Agricultural Journal 83, October (1996): 621–22. http://dx.doi.org/10.29321/maj.10.a01064.

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Combining ability analysis was done in six genotypes of fodder lab lab for 12 traits viz plant height, primary branches per plant, secondary branches per plant, number of leaves, specific leaf weight, green fodder yield, dry weight of leaf, dry weight of stem, leaf:stem ratio, dry matter yield, crude protein and phosphorus content. Based on gea effects among the parents, MS 9495, CO 1, CO 2 and DL. 3196 were found to be good combiners, Predominance of GCA variance was observed in all the traits indicating preponderance of additive gene action.

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17

S, KALAIMANI, and THANGAVELU S. "COMBINING ABILITY STUDIES IN GROUNDNUT." Madras Agricultural Journal 83, November (1996): 687–91. http://dx.doi.org/10.29321/maj.10.a01084.

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Five rust resistant and four rust susceptible groundnut (Arachis hypogaca L.) genotypes were crossed in all possible combinations to study the nature of combining ability and gene action involved for 13 quantitative traits. Combining ability analysis showed the importance of GCA variance alone for number of primary branches and days to 50 per cent flowering while for the remaining characters, both the GCA and SCA variances were important with predominance of GCA indicating the scope for exploiting the available additive components. The rust resistant Virginia genotypes VG 78 and CS 31 were the best general combiners for yield and yield components while the two Spanish types CO 1 and VRI 1 for carliness, number of mature pods per plant and harvest index and VRI 1 for oil content also. Inter-subspecific hybridisation between the Spanish and Virginia genotypes followed by intermating is advocated to exploit both the additive and non-additive components.

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CHAND, POORAN. "COMBINING ABILITY IN WINTER SORGHUM." Madras Agricultural Journal 83, september (1996): 573–75. http://dx.doi.org/10.29321/maj.10.a01057.

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The nature of gene action through combining ability analysis for grain yield and its components was studied in 5 X 5 diallel cross of sorghum. Estimates of gea and sca indicated the influence of both additive and non additive gene action for the inheritance of grain yield, stem girth and plant height. The cultivar SPV-462 was the best general combiner for all the traits under study. The best specified crosses viz, SPV-462 X M35- 1, SPV-472 X Moti, SPV-913 X M35-1 and M35-1 X Moti for grain yield resulted from non-additive gene action could be utilised in heterosis breeding programme.

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P, VINDHIYA VARMAN. "Combining ability estimates in groundnut." Madras Agricultural Journal 87, september (2000): 462–66. http://dx.doi.org/10.29321/maj.10.a00502.

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Accurate identification of promising parents is crucial for groundnut (Arachis hypogaea L.) cultivar development. Six cultivars, namely, ICGS 44, Ginar 1, ALR 2, JL 24, GG 2 and CO 2 were intermated in all possible combinations in a full diallel mating design. The 30 reciprocal F, hybrids and six parents were utilized for the study. Five traits, namely, number of mature pods, kernel weight, pod yield, shelling outturn and oil content were recorded for the estimation of general combining ability (gea) and specific combining ability (sea) effects. The greater SCA variance than GCA variance for the number of mature pods, pod yield, shelling outturn and oil content, whereas, the reverse is true for kernel weight. The crosses ALR 2 x JL. 24 and ICGS 44 x JL 24 had greater sea effects for pod yield. Hence the gene action. involved in this cross may be of additive x additive type. These two crosses could be used for further selection to obtain high yielding progenies. Seven of the fifteen crosses had significant reciprocal effect for the traits, pod yield and oil content. Hence, the influence of maternal effect on the economic traits is evident in the present material.

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P, VINDHIYAVARMAN, and GANESAN K. "THE COMBINING ABILITY IN CASTOR." Madras Agricultural Journal 82, september October (1995): 545–47. http://dx.doi.org/10.29321/maj.10.a01260.

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Combining ability of the three pistillate lines and eight testers was assessed by Line x .ester analysis. The variance components due to sea were higher than gca for five characters except for number of nodes upto the main spike indicating the predominance of non- additive gene action. The genotypes 262-1 and TMV 5 mutant 3 were the good general combiners. The hybrid combinations 240 x TMV 5 mutant 1, 240 x TMV 5 mutant 4 and 262 1 x TMV 5 mutant 3 were good specific combiners. These materials can be profitably utilised in the exploitation of new hybrids in castor.

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SELIMA, KHATUN VEDANTI H. BAGADE SANDEEP R. KAMDI DIKSHA TAJANE SHARAD BHURE AND MILIND MESHRAM. "COMBINING ABILITY STUDIES IN MUSTARD." Journal of Soils and Crops 35, no. 1 (2025): 195–200. https://doi.org/10.5281/zenodo.15542965.

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Azhar M, T., A. Khan A, and A. Khan I. "Combining Ability Analysis of Heat Tolerance in Gossypium hirsutum L." Czech Journal of Genetics and Plant Breeding 41, No. 1 (2011): 23–28. http://dx.doi.org/10.17221/3678-cjgpb.

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In order to study the genetic control of heat tolerance, four varieties/lines of Gossypium hirsutum L., namely MNH-554, Cocker-304, Delcerro and Albacala (71) 1190, were crossed in all possible combinations. Heat tolerance of 12 hybrids and their parents was measured at reproductive phase using an electrolyte leakage technique. The genetic analysis of the data showed significant effects of specific combining ability and reciprocals, but the effect of general combining ability appeared to be non-significant. Comparison of the parents for heat tolerance revealed that Delcerro and MNH-554 were the best general combiners for the character. The crosses Cocker-304 &times; Delcerro and Albacala (71) 1190 &times; MNH-554 were determined as the best combinations for heat tolerance and they involved one good general combiner as a parent. Significant effects due to specific combining ability indicated the importance of non-additive gene effects controlling heat tolerance. This information suggests that development of heat tolerance in the present plant material may be difficult; therefore it is necessary to design a specific breeding programme for efficient transfer of the trait. &nbsp;

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Nguyen, Thi Lang, and Chi Buu Bui. "Combining Ability and Heterosis for Some Physiological Traits in Rice." International Rice Research Notes 18, no. 1 (1993): 7–8. https://doi.org/10.5281/zenodo.6822429.

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This article 'Combining Ability and Heterosis for Some Physiological Traits in Rice' appeared in the International Rice Research Notes series, created by the International Rice Research Institute (IRRI) to expedite communication among scientists concerned with the development of improved technology for rice and rice-based systems. The series is a mechanism to help scientists keep each other informed of current rice research findings. The concise scientific notes are meant to encourage rice scientists to communicate with one another to obtain details on the research reported.

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Ansimova, Е. I., and P. S. Katmakov. "Combining ability of lines in simmental." Vestnik of Ulyanovsk state agricultural academy, no. 1(49) (March 16, 2020): 124–29. http://dx.doi.org/10.18286/1816-4501-2020-1-124-129.

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Adhikari, Sneha, Sanjana Pathak, Deepak Joshi, Usha Pant, and Ram Bhajan. "Combining ability analysis in Indian mustard." Journal of Hill Agriculture 9, no. 3 (2018): 304. http://dx.doi.org/10.5958/2230-7338.2019.00009.0.

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Vacaro, Elton, José Fernandes Barbosa Neto, Diego Girardi Pegoraro, Claudio Natalino Nuss, and Leo Duc Haa Conceição. "Combining ability of twelve maize populations." Pesquisa Agropecuária Brasileira 37, no. 1 (2002): 67–72. http://dx.doi.org/10.1590/s0100-204x2002000100009.

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Genetic progress depends on germplasm quality and breeding methods. Twelve maize populations and their crosses were evaluated to estimate combining ability and potential to be included as source populations in breeding programs. Plant height, point of insertion of the first ear, number of ears per plant, number of grains per ear, root and stalk lodging and grain yield were studied in two locations in Brazil, during the 1997/98 season. Genotype sum of squares was divided into general (GCA) and specific (SCA) combining ability. Results indicated the existence of genetic divergence for all traits analyzed, where additive effects were predominant. The high heterosis levels observed, mainly in Xanxerê, suggested the environmental influence on the manifestation of this genetic phenomenon. Populations revealed potential to be used in breeding programs; however, those more intensively submitted to selection could provide larger genetic progress, showing the importance of population improvement for the increment of the heterosis in maize.

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K.U.K.Nampoothiri, P.M. Kumaran, B.A. Jerard, M.J.Ratnambal E.V.V.B.Rao, and V.A. Parthasarathy. "COMBINING ABILITY IN COCONUT (Cocos nucifera)." CORD 15, no. 02 (1999): 34. http://dx.doi.org/10.37833/cord.v15i02.330.

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Combining ability has been proved to be a method to identify and select the parents and hybrids for increased production through the exploitation of heterosis. The exploitation of heterosis would be useful if suitable hybrids are produced for low yielding environmental conditions of littoral sandy soil. Combining ability effects for early germination, seedling girth, seedling height and breadth of laminate leaf on coconut have been reported by Louis and Chopra (1991) and on husked nut weight by Fernando (1996). Estimation of GCA and SCA variance will help to find out the gene action involved in a particular character and thus one can decide the breeding method for the improvement of the character. The present investigation was carried out to find out the general and specific combining ability effects of parents and hybrids at Central Plantation Crops Research Institute, Kasaragod.

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Do Nascimento, Tiago Lima, Flávio De França Souza, Rita De Cassia Souza Dias, and Edson Ferreira Da Silva. "Watermelon general and specific combining ability." Comunicata Scientiae 10, no. 1 (2019): 132–40. http://dx.doi.org/10.14295/cs.v10i1.2899.

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The combining ability of six watermelon genotypes was estimated in a diallel cross scheme (6x6), including genotypes JNY (1), ‘ORA’ (2), ‘KOD’ (3), ‘SOL’ (4), ‘CHG’ (5), ‘PEA’ (6) and all possible hybrids between them. A randomized complete block design (RCB) was used, with 36 treatments, three blocks, and plots with five plants. The following traits were evaluated: days before female flower anthesis, main branch length, fruit mass, number of fruits per plant, yield, fruit length, fruit width, pulp firmness, soluble solids content, average rind thickness, seed length, seed width, and seed mass. The data obtained were submitted to analysis of variance, and a diallel analysis was performed according to Griffing’s experimental method I. According to the general combining ability estimates obtained, genotypes ‘KOD’ (3) and ‘JNY’ (1) were the most likely ones to produce hybrids with smaller-sized fruits and smaller seeds. The reciprocal effects confirmed that the results indicate that these genotypes should be used as pollen donors and pollen recipients, respectively. On the other hand, genotypes ‘ORA’ (2) and ‘CHG’ (5) can be used for the commercial exploitation of sliced watermelons. According to the specific combining ability estimates obtained, the combinations ‘ORA’ (2) x ‘PEA’ (6), ‘ORA’ (2) x ‘JNY’ (1), ‘CHG’ (5) x ‘KOD’ (3), ‘PEA’ (6) x ‘KOD’ (3), and ‘CHG’ (5) x ‘SOL’ (4) stood out as being the genotypes most likely to produce the smallest fruits and smallest seeds.

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Shattuck, V. I., B. Christie, and C. Corso. "Principles for Griffing's combining ability analysis." Genetica 90, no. 1 (1993): 73–77. http://dx.doi.org/10.1007/bf01435180.

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S. AL- Zuheary, Nazar. "HETEROSIS AND COMBINING ABILITY IN MIZE." Kirkuk University Journal-Scientific Studies 3, no. 2 (2008): 47–58. http://dx.doi.org/10.32894/kujss.2008.42151.

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S.N, SHARMA, and MALOO S.R. "COMBINING ABILITY STUDIES IN DURUM WHEAT." Madras Agricultural Journal 73, july (1986): 370–74. http://dx.doi.org/10.29321/maj.10.a02284.

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Combining ability study was carried out for grain vied, its component tralis, harvest index and grain protein content in a diallel sct of six diverse varieties of. durum wheat (Triticum durum Desi.) in F, and F, generations General and specif combining ability were highly significant for all the seven traits in both the gene- 10t-ons. However, the magnitude of GCA variances was much high than that of SCA variances for all the characters reflecting the predominance of additive gene effects in their genetic control. The per se performance of the parents was associated with their GCA effects. The varieties Raj 1721. Raj 2070 and Raj 1521. W best general cen.biners. Superior cicsses involved atleast cno good general combiner.

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P.S, DEVANAND, and VIJENDRA DAS L.D. "COMBINING ABILITY IN FODDER PEARL MILLET." Madras Agricultural Journal 83, October (1996): 623–24. http://dx.doi.org/10.29321/maj.10.a01065.

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Combining ability analysis was done in pearl millet for 12 quantitative traits including crude protein, calcium and oxalate contents. Predominance of GCA variance was observed in the traits viz, days to 50 per cent flowering, intermodal length, green fodder yield per clump, dry matter yield per clump, crude protein and oxalate contents while other six quantitative traits-viz., plant height, number of tillers per clump, number of leaves per clump, leaf area per clump, stem girth and calcium content showed predominance of SCA variance.

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САДИГІВ, АЛАДДІН НЕМЕТ ОГЛИ. "COMBINING ABILITY OF APPLE BREEDING VARIETIES." Аграрні інновації, no. 22 (December 21, 2023): 150–53. http://dx.doi.org/10.32848/agrar.innov.2023.22.23.

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The article presents the results of studying apple varieties based on multi-year expeditionary surveys of various regions of Azerbaijan. Research Methodology. The studies were conducted from 1985 to the present in the Department of Fruit Crop Breeding at the Scientific Research Institute of Fruit Growing and Tea Growing (Institute). Local, introduced, and breeding varieties of Institute were used as initial material. Results Local, introduced, and breeding varieties of Institute resistant to scab and other diseases were identified by scientists. Since 1985, the agrobiological properties of samples included in the apple gene pool have been studied. Breeding work in Azerbaijan continued through crossing (F2). As a result, apple varieties such as Nigar, Marfa, Sulkh, Gobustan, Zumrud, Gyzyltadzh, Khazar, Eldar, Ulvi, Nyubar, Vatan, Makhmari, Nuran, Sarvan, Chyraggala, Davamly, Emil, Elvin, Kubinsky Autumn, Kubinsky Winter, Shabran, Sevinj, Lale, and others were created. High fruit tree productivity is one of the most important qualities of each created variety. Our observations showed that the best crossbreeding combinations for obtaining productive varieties include: Naila × Sary Tursh (Sevinj variety) – 45, Eyubi × Winter Red Ginger (Sadaf) – 43, Guba Reneti × Sary Tursh (Elvin) – 35, S. Vurgun × Jir Gadzhi (Gyzyltadzhe) – 35, Naila × Pepin London (Kubinsky Winter) – 31, Sona Alma × Sary Tursh (Ulvi) – 30, Naila × Jir Gadzhi, Sary Tursh (Gobustan) – 30 t/ha. Conclusion. Based on the conducted research, promising varieties have been identified with key characteristics such as large fruit size, high productivity, and good quality. These varieties have been transferred to both private and state-owned farms for cultivation. All varieties demonstrate fruit yield within the range of 73–87% in terms of commercial quality. Varieties such as Sadaf, Sevinj, Shabran, Elvin, Emil, Davamly, Chyraggala, Makhmari, Vatan, and Ulvi have shown high commercial value and consumer appeal.

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Nantale, Gauden, Peter Wasswa, Muhumuza Edgar, Tusiime Richard, Pamela Paparu, and Isaac Onziga Dramadri. "Combining Ability of Cowpea (Vigna unguiculata (L) Walp) Genotypes for Resistance to Cowpea Bacterial Blight in Uganda." American Journal of Agricultural Science, Engineering, and Technology 7, no. 1 (2023): 21–28. https://doi.org/10.54536/ajaset.v7i1.1174.

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The low productivity of cowpea is partly attributed to a number of constraints including diseases such as cowpea bacterial blight (CoBB). Cowpea bacterial blight has the capacity to cause up to 92% yield loss under severe infections. The objective of this study was to determine the combining ability for resistance to CoBB among cowpea genotypes in Uganda. Nine selected parents were crossed to produce 63 progenies. F1 progenies were evaluated and data gathered included days to 50% flowering, CoBB disease scores and grain yield. The mean squares for rAUDPC due to GCA and SCA effects were significant (P≤0.001) and non-significant respectively. The broad sense coefficient of genetic determination (BCGD) and narrow sense coefficient of genetic determination (NCGD) were 44.3% and 29.1% respectively for rAUDPC. Parents WC 26 (-0.023) and NE 31 (-0.035) had highly significant negative GCA effects for rAUDPC and were therefore good general combiners for this trait. Crosses SECOW 3B x ACC 26 X SECOW 1T and WC 26 x NE 32 had negative significant SCA effect for rAUDPC with a values of -0.073 and -0.06, respectively while Crosses ACC 26 x SECOW 1T x NE 40 (-0.07) and NE 40 x WC 26 (-0.06) had significant negative reciprocal effects for rAUDPC. This study revealed that genetic inheritance for cowpea bacterial blight was controlled predominantly by additive gene effects. Parents WC 26 and NE 31 identified as good general combiners for resistance to CoBB could be utilized as sources of resistance while Crosses SECOW 3B x ACC 26 X SECOW 1T, WC 26 x NE 32, ACC 26 X SECOW 1T x NE 40 and NE 40 x WC 26 that were the best specific combiners for resistance to CoBB could be put under further evaluation as potential varieties.

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Keerthi, C. M., S. Ramesh, M. Byregowda, and A. Mohan Rao. "Hybrid Specific Combining Ability in Relation to Parental General Combining Ability in Dolichos Bean (Lablab purpureus L.)." International Journal of Current Microbiology and Applied Sciences 7, no. 1 (2018): 1442–50. http://dx.doi.org/10.20546/ijcmas.2018.701.175.

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Rind, Raza Ali, Shabana Memon, Wajid Ali Jatoi, and Muhammad Rafeque Rind. "General Combining Ability and Specific Combining Ability Analysis for Terminal Heat Tolerance in Wheat (Triticum Aestivum L.)." Journal of Applied Research in Plant Sciences 4, no. 02 (2023): 211–21. http://dx.doi.org/10.38211/joarps.2023.04.02.187.

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Developing bread wheat genotypes for terminal heat tolerance is a critical objective for future breeding approaches. The line x tester mating analysis is one of the best approaches to demonstrate the appropriateness of the bread wheat genotypes for selection programs. For this purpose, nine genotypes viz. T.J-83, NIA Sarrang, Khirman, SKD-1, Sehar-2006, Sarsabaz, AS-2002, NIA-Amber, and Nifa Barsat were used in this research. The experiment was planned in a factorial design with two treatments (normal and heat stress) at Botanical Garden Farm, Sindh Agriculture University Tandojam, during 2019-2020. The results depicted that at terminal heat stress, the genotypes were significantly affected by yield and physiological traits at late sowing. During the initial screening, the female parents, T.J-83, Sarsabaz, and Nifa Barsat executed very well under heat stress conditions for nearly all the yield and morphological traits. Similarly,the male parents such as Khirman and SKD-1 also performed well under heat stress conditions for all traits compare to the female parents. Furthermore, through genetic analysis, the mean effects of General Combining Ability (GCA) and Specific Combining Ability (SCA) were significant for all the characters signifying that additive and non-additive variances are important. Further, in heat-stress environments, the GCA was dominant for most characters in contrast to SCA variations. Hence, in this study, under both normal and heat stress conditions, Khirman and SKD-1 proved to be better general combiners for various characters. Therefore, these genotypes are recommended as vigor parents for hybridization and selection programs as emerging terminal heat stress tolerant genotypes.

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Pritika Neupane. "Estimation of general combining ability, specific combining ability and heterosis among selected rice (Oryza sativa L.) genotypes." World Journal of Advanced Research and Reviews 16, no. 2 (2022): 167–80. http://dx.doi.org/10.30574/wjarr.2022.16.2.1126.

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Rice is the most important cereal crop and is primary source of calorie for Nepalese. Though, few rice varieties have been released for cultivation among farmers, most of them are low yielding so are not preferred by the farmers. So, broadening the genetic base of rice is an important intervention that can be done to increase productivity. Thus, an experiment was conducted to estimate general combining ability, specific combining ability, and heterosis from three sets of crosses to find out best parents and their cross combinations. The set1 consists 2 lines and 4 testers, set2 consists 3 lines and 2 testers and set3 consists 2 lines and 2 testers respectively. Each set of parents were crossed in line X tester mating design with two replications to produce 18 F1. The analyzed data showed that all genotypic values were significant and showed maximum variations among the traits. When fertile grain number was considered Sukhadhan-2 was best parents and cross of Manjushree 2 X Samba Mahsuri Sub-1 and Himali X Taichung-176 were the best cross and for panicle length IR775- 39-80-2- 2-2 was obtained as best parent and the best cross was Khumal 8 X Sugandha- 2. Maximum heterosis was observed in Khumal 8 X Sukhadhan-2 for fertile grain number and Khumal -4 X Sugandha-2 for panicle length. Therefore, best parents could be utilized for creating best lines through hybridization and best cross combinations would work as best lines for further selection and evaluation. These lines might work as promising varieties for Nepal.

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Cvejić, S., S. Jocić, E. Mladenović, et al. "Evaluation of combining ability in ornamental sunflower for floral and morphological traits." Czech Journal of Genetics and Plant Breeding 53, No. 2 (2017): 83–88. http://dx.doi.org/10.17221/50/2016-cjgpb.

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Ornamental sunflowers are widely cultivated for use as cut flowers and/or as garden plants. The objective of the study was to investigate breeding values of new F<sub>1</sub> ornamental sunflower hybrids using incomplete diallel crossing of four ornamental inbred lines: Heliopa, Talia, Iskra and Neoplanta. Six traits important for ornamental market use were studied. Additive gene effects prevailed in most tested traits except for lateral floral diameter and duration of lateral flowering, which exhibited non-additive effects. The results indicated that the Talia × Neoplanta hybrid combination was the most promising for cut flowers due to long and strong branches, relatively big lateral flowers while Heliopa × Iskra and Heliopa × Talia hybrids were suitable for use as garden plants due to strong plant habit, long flowering time and desirable plant height. The results obtained from this study will be helpful for further ornamental sunflower breeding.

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Louis, S.J., A.M. Kadams, S.Y. Simon, and S.G. Mohammed. "Combining Ability in Roselle Cultivars for Agronomic Traits in Yola, Nigeria." Greener Journal of Agricultural Sciences 3, no. 2 (2013): 145–49. https://doi.org/10.15580/GJAS.2013.2.120512317.

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<strong>Combining ability estimates of roselle cultivars were studied in a 6 x 6 half diallel analysis.  The results showed significant entries, parents and crosses for all the traits studied in the individual and also in the poolled analysis, suggesting that roselle populations were highly variable for all the traits and therefore would most likely respond to selection. Significant GCA and SCA variances were also obtained in all the traits,</strong><strong> implying that both the additive and non-additive gene effects were operating in the genetic expression of the traits. The non-additive gene effect was however greater in magnitude as shown by the δ</strong><strong><sup>2 </sup></strong><strong>G</strong><strong>CA/δ</strong><strong><sup>2 </sup></strong><strong>SCA ratios, which were all less than unity. The combining ability analysis of parents also revealed that Gerio-AB3, Bazza-AB2 and Bazza-AB1 yielded consistently higher general combining ability effect for most of the traits, indicating that their crosses should produce desirable segregates for the improvement of calyx yield of roselle. SCA effects identified Bazza-AB2 x Gerio-AB2, Bazza-AB1 x Gerio-AB3 and Bazza-AB1 x Michika-AB1 as the best crosses</strong><strong>.</strong>

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Dr., Rishi Pal. "Combining ability and heterosis for bud fly infestation and seed yield and it's attributes in linseed (Linum usitatissimum L.)." International Journal of Environmental and Agriculture Research 11, no. 4 (2025): 07–15. https://doi.org/10.5281/zenodo.15300679.

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<strong>Abstract</strong><strong>—</strong> Four bud fly-resistant germplasm lines viz., EC-1424, GS-234, IC-15888, and JRF-5 were crossed with three testers (Neelum, Neela, and Shekhar) in a line × tester mating design to develop 21 F₁ and 21 F₂ crosses. The study was undertaken to estimate combining ability and heterosis in linseed (Linum usitatissimum L.) for bud fly infestation, seed yield, and related traits. The analysis of variance for general combining ability (GCA) and specific combining ability (SCA) was highly significant in both F₁ and F₂ generations. Based on per se performance and GCA effects, the best general combiners identified in both F₁ and F₂ generations were Neela for days to flowering and bud length; IC-15888 for sepal thickness, maturity duration, and bud fly infestation at the dough stage; Shekhar and Neela for grains per capsule; Neela for test weight; GS-234 and Neelum for oil content. However, no common general combiner was found for bud width, capsules per plant, and seed yield per plant across both generations. For capsules per plant, Shekhar was a good combiner only in the F₁ generation. Heterosis over the superior parent for bud fly infestation at the dough stage ranged from –99.03% (EC-1424 × JRF-5) to –48.59% (Shekhar × Neelum) in the F₁ generation. Out of 21 crosses, 20 crosses exhibited significant negative economic heterosis for this trait. The top five promising crosses were EC-1424 × JRF-5, EC-1424 × Neela, GS-234 × IC-15888, GS-234 × JRF-5, and IC-15888 × Shekhar. Only one cross (EC-1424 × Shekhar) showed significant positive heterosis for bud fly infestation. For seed yield per plant, heterosis over the economic parent ranged from 28.64% (JRF-5 × Neelum) to 51.90% (Shekhar × Neelum) in the F₁ generation. Among all crosses, six crosses exhibited significant positive heterosis. These cross combinations may serve as potential genetic resources in future linseed breeding programs aimed at improving yield and bud fly resistance.

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Karvar, S. H., V. Y. Pawar, and H. T. Patil. "Heterosis and combining ability in pearl millet." Electronic Journal of Plant Breeding 8, no. 4 (2017): 1197. http://dx.doi.org/10.5958/0975-928x.2017.00173.9.

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Kumar, Devendra, Krishna Chandra Nandi, and S. P. Singh. "Combining Ability Analysis in Maize (Zia-Maize)." Progressive Agriculture 15, no. 2 (2015): 212. http://dx.doi.org/10.5958/0976-4615.2015.00009.5.

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EI-Meghawry,, A., A. Kamooh, M. Abd EI-Salam, and S. Gaman. "COMBINING ABILITY STUDIES IN WATERMELON (Citrullus lanatus)." Journal of Plant Production 27, no. 2 (2002): 1201–11. http://dx.doi.org/10.21608/jpp.2002.253327.

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Kamble, Divya S., Shivaji Duradundi V.D. Gasti, Shashikanth Evoor, Dileep Kumar A. Masuthi, and Sumangala Koulagi. "Combining Ability in Ridge Gourd [Luffa acutangula]." International Journal of Current Microbiology and Applied Sciences 7, no. 12 (2018): 567–77. http://dx.doi.org/10.20546/ijcmas.2018.712.071.

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45

Balliu, A., and M. Hallidri. "COMBINING ABILITY TEST BETWEEN SOME TOMATO GENOTYPES." Acta Horticulturae, no. 579 (May 2002): 123–26. http://dx.doi.org/10.17660/actahortic.2002.579.17.

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Kumar, Vipesh, S. K. Jindal, and M. S. Dhaliwal. "Combining ability studies in tomato (Solanum lycopersicumL.)." Agricultural Research Journal 52, no. 2 (2015): 121. http://dx.doi.org/10.5958/2395-146x.2015.00003.4.

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Islam, A. K. M. Aminul, Nurina Anuar, Zahira Yaakob, Jaharah A. Ghani, and Mohamad Osman. "Combining Ability for Germination Traits inJatropha curcasL." Scientific World Journal 2013 (2013): 1–6. http://dx.doi.org/10.1155/2013/935981.

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Six parents ofJatropha curcaswere crossed in half diallel fashion, and theF1s were evaluated to determine the combining ability for nine germination parameters. The ratio between general combining ability (GCA) and specific combining ability (SCA) variances indicated preponderance of additive gene action for all the characters except germination percentage, time of 50% germination, seedling length, and seedling vigor index. The parentsP1andP2were the best general combiner for most of the characters studied. The crossP1×P5was the best specific combiner for speed of emergence, germination percentage, germination energy, germination index, and seedling vigor index, the crossP2×P5for mean germination time, time of 50% germination, and seedling length, and the crossP4×P5for number of days to first germination. The germination percentage varied from 58.06 to 92.76% among the parents and 53.43 to 98.96% among the hybrids. The highest germination (98.96%) was observed in hybridP2×P4, and none of the hybrids or parents showed 100% germination. The highest germination index (GI) and seedling vigor index (SVI) were found in hybridP1×P5andP2×P5, respectively. The results of this study provide clue for the improvement ofJatrophavariety through breeding program.

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Omran, S., W. Ramadan, and Y. Mostafa. "HETEROSIS AND COMBINING ABILITY IN WATERMELON HYBRIDS." Journal of Plant Production 3, no. 12 (2012): 3139–48. http://dx.doi.org/10.21608/jpp.2012.85375.

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El-Shenawy, A. A., and M. A. A. Hassan. "Combining Ability of New Maize Inbred Lines." Egyptian Journal of Plant Breeding 19, no. 2 (2015): 263–71. http://dx.doi.org/10.12816/0011713.

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Gavioli, E. A., D. Perecin, and A. O. Mauro. "Analysis of combining ability in soybean cultivars." Cropp Breeding and Applied Biotechnology 6, no. 2 (2006): 121–28. http://dx.doi.org/10.12702/1984-7033.v06n02a02.

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