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Journal articles on the topic 'Octoploid'

Author: Grafiati

Published: 3 June 2025

Last updated: 31 July 2025

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1

Gogoi, S., Meghali Borua, and R. Rajan. "Induced auto-octoploidy in Som, Persea Bombycina (King Ex Hook. F.) Kosterm." Indian Journal of Forestry 33, no. 3 (2010): 319–22. http://dx.doi.org/10.54207/bsmps1000-2010-e2emgy.

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Presently auto-octoploidy has been induced in an induced auto-tetraploid som, Persea bombycina (2n=24), the principal food plant of muga silkworm (Antheraea assamensis Helfer), through colchicine treatment (0.5%). Auto-octoploids showed deterioration in almost all the morphological features in contrast to tetraploid which seem to be the optimum ploidy level. Auto–octoploid is highly susceptible to stem diseases and dwarf in growth nature.

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2

Bors, Robert H., and J. Alan Sullivan. "Introgression of Fragaria Species using a Streamlined Synthetic Octoploid System." HortScience 32, no. 3 (1997): 548D—548. http://dx.doi.org/10.21273/hortsci.32.3.548d.

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Fragaria species from the center of diversity have not been integrated into octoploid commercial strawberry cultivars because of ploidy level differences. Even though traits such as disease resistance, enhanced flavor, cold hardiness, and vigor are known to exist in the diploid, tetraploid, and hexaploid species, they cannot be easily used for breeding. The synthetic octoploid method circumvented introgression difficulties by combining lower ploidy species and doubling to the octoploid level. Although easily crossed to cultivars, the use of synthetic octoploids has been minimal as it has been

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3

Eng, Wee Hiang, Wei Seng Ho, and Kwong Hung Ling. "In vitro induction and identification of polyploid Neolamarckia cadamba plants by colchicine treatment." PeerJ 9 (October 27, 2021): e12399. http://dx.doi.org/10.7717/peerj.12399.

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Polyploidization has played a crucial role in plant breeding and crop improvement. However, studies on the polyploidization of tropical tree species are still very scarce in this region. This paper described the in vitro induction and identification of polyploid plants of Neolamarckia cadamba by colchicine treatment. N. cadamba belongs to the Rubiaceae family is a natural tetraploid plant with 44 chromosomes (2n = 4x = 44). Nodal segments were treated with colchicine (0.1%, 0.3% and 0.5%) for 24 h and 48 h before transferring to shoot regeneration medium. Flow cytometry (FCM) and chromosome co

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4

Liu, Bo, Elizabeth G. Poulsen, and Thomas M. Davis. "Insight into octoploid strawberry (Fragaria) subgenome composition revealed by GISH analysis of pentaploid hybrids." Genome 59, no. 2 (2016): 79–86. http://dx.doi.org/10.1139/gen-2015-0116.

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As the product of interspecific hybridization between its two ancestral octoploid (2n = 8x = 56) species (Fragaria chiloensis and F. virginiana), the cultivated strawberry (F. ×ananassa) is among the most genomically complex of crop plants, harboring subgenomic components derived from as many as four different diploid ancestors. To physically visualize the octoploids’ subgenome composition(s), we launched molecular cytogenetic studies using genomic in situ hybridization (GISH), comparative GISH (cGISH), and rDNA-FISH techniques. First, GISH resolution in Fragaria was tested by using diploid an

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5

Kucharska, Danuta, Małgorzata Podwyszyńska, Aleksandra Trzewik, Agnieszka Marasek-Ciołakowska, Stanisław Pluta, and Łukasz Seliga. "In Vitro Induction and Primary Evaluation of Octoploid Plants in Saskatoon Berry (Amelanchier alnifolia Nutt.)." Agronomy 12, no. 5 (2022): 1215. http://dx.doi.org/10.3390/agronomy12051215.

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Polyploids of many species of horticultural plants are widely used in breeding programs since they are characterized by vigorous growth, larger organs, and greater resistance to biotic and abiotic stress. Saskatoon berry (Amelanchier alnifolia Nutt.) is in a form of diploid (2n = 2x = 34) and tetraploid. So far, no reports on induction of polyploidy in this species have been found. The aim of the study was to obtain Saskatoon berry octoploids with the use of in vitro shoot cultures. Shoots of the tetraploid of Canadian cultivars ‘Martin’ and ‘Smoky’ derived from in vitro cultures were used for

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Banks, P. M., S. J. Xu, R. R. C. Wang, and P. J. Larkin. "Varying chromosome composition of 56-chromosome wheat × Thinopyrum intermedium partial amphiploids." Genome 36, no. 2 (1993): 207–15. http://dx.doi.org/10.1139/g93-029.

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Thinopyrum intermedium (2n = 42) is a source of many potentially useful genes for wheat improvement. Many partial amphiploids have been produced between Th. intermedium and Triticum aestivum that are fertile and stable. These partial amphiploids all have 56 chromosomes, including seven pairs of chromosomes from Th. intermedium. To explore the genomic composition of these lines, meiotic analysis was conducted on 32 hybrid combinations between eight different partial amphiploids. All but two of the chosen parents were distinguishable on the basis of perenniality, head morphology, and reactions t

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7

Mandáková, Terezie, Judita Zozomová-Lihová, Hiroshi Kudoh, Yunpeng Zhao, Martin A. Lysak, and Karol Marhold. "The story of promiscuous crucifers: origin and genome evolution of an invasive species, Cardamine occulta (Brassicaceae), and its relatives." Annals of Botany 124, no. 2 (2019): 209–20. http://dx.doi.org/10.1093/aob/mcz019.

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Abstract Background and Aims Cardamine occulta (Brassicaceae) is an octoploid weedy species (2n = 8x = 64) originated in Eastern Asia. It has been introduced to other continents including Europe and considered to be an invasive species. Despite its wide distribution, the polyploid origin of C. occulta remained unexplored. The feasibility of comparative chromosome painting (CCP) in crucifers allowed us to elucidate the origin and genome evolution in Cardamine species. We aimed to investigate the genome structure of C. occulta in comparison with its tetraploid (2n = 4x = 32, C. kokaiensis and C.

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8

Armstrong, K. C. "Chromosome pairing in octoploid F1 and octoploid amphiploid hybrids between Bromus inermis and B. pumpellianus." Canadian Journal of Genetics and Cytology 27, no. 5 (1985): 538–41. http://dx.doi.org/10.1139/g85-079.

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Chromosome pairing in the amphiploid (8x) of 4x Bromus pumpellianus ssp. dicksonii × 4x B. inermis was compared with pairing in the F1 hybrids between natural octoploid cytotypes of B. inermis and B. pumpellianus and the octoploid parents. Predominantly bivalent pairing was found in both the amphioctoploid, octoploid F1 hybrids, and octoploid parents. Bivalent formation in the amphioctoploid could be based on chromosome differentiation between the tetraploid cytotypes of B. inermis and B. pumpellianus. These results suggest that the evolution of the octoploid cytotypes of B. inermis and B. pum

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9

Barbey, Christopher R., Seonghee Lee, Sujeet Verma, et al. "Disease Resistance Genetics and Genomics in Octoploid Strawberry." G3: Genes|Genomes|Genetics 9, no. 10 (2019): 3315–32. http://dx.doi.org/10.1534/g3.119.400597.

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Octoploid strawberry (Fragaria ×ananassa) is a valuable specialty crop, but profitable production and availability are threatened by many pathogens. Efforts to identify and introgress useful disease resistance genes (R-genes) in breeding programs are complicated by strawberry’s complex octoploid genome. Recently-developed resources in strawberry, including a complete octoploid reference genome and high-resolution octoploid genotyping, enable new analyses in strawberry disease resistance genetics. This study characterizes the complete R-gene collection in the genomes of commercial octoploid str

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10

Mao, Haotian, Mengying Chen, Yanqiu Su, et al. "Comparison on Photosynthesis and Antioxidant Defense Systems in Wheat with Different Ploidy Levels and Octoploid Triticale." International Journal of Molecular Sciences 19, no. 10 (2018): 3006. http://dx.doi.org/10.3390/ijms19103006.

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To investigate the evolutionary differences of wheat with different ploidy levels and octoploid Triticale, photosynthetic capacity, and antioxidant defenses system were compared within and between diploid, tetraploid and hexaploid wheat, and octoploid Triticale seedlings. The results showed that seed germination rate, chlorophyll content, and photochemical activity of photosystems, and the activities of antioxidative enzymes in hexaploid wheat and octoploid Triticale were significantly higher than in diploid and tetraploid wheat. Compared to other two wheat species and octoploid Triticale, hex

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11

Furlong, Rebecca F., and Peter W. H. Holland. "Were vertebrates octoploid?" Philosophical Transactions of the Royal Society of London. Series B: Biological Sciences 357, no. 1420 (2002): 531–44. http://dx.doi.org/10.1098/rstb.2001.1035.

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It has long been suggested that gene and genome duplication play important roles in the evolution of organismal complexity. For example, work by Ohno proposed that two rounds of whole genome doubling (tetraploidy) occurred during the evolution of vertebrates: the extra genes permitting an increase in physiological and anatomical complexity. Several modifications of this ‘two tetraploidies’ hypothesis have been proposed, taking into account accumulating data, and there is wide acceptance of the basic scheme. In the past few years, however, several authors have raised doubts, citing lack of dire

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12

Dąbrowska, Janina. "Number of nucleoli in diploids and polyploids of the genus Achillea L." Acta Societatis Botanicorum Poloniae 58, no. 4 (2014): 541–48. http://dx.doi.org/10.5586/asbp.1989.041.

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Nucleoli were counted in 9228 interphase nuclei of the apical root meristem of 40 <em>Achillea </em>L. taxa (di-, tetra-. hexa- and octoploids). It was established that the distribution of nucleoli number in an interphase nucleus can be used as a rough practical indicator to distinguish between diploids and polyploids. The highest number of nucleoli (12) was found in an octoploid <em>Achillea pannonica</em>, but only in a small percentage of the nuclei (0.3% out of 283 nuclei).

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13

Armstrong, K. C. "Introgression of germplasm from 8× to 4× smooth bromegrass." Canadian Journal of Plant Science 72, no. 4 (1992): 1255–58. http://dx.doi.org/10.4141/cjps92-157.

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A study was undertaken to determine the feasibility of introgressing genes from the octoploid to the tetraploid cytotype in Bromus inermis Leyss. The octoploid × tetraploid, hexaploid × tetraploid, and "pentaploid" × tetraploid crosses were successfully made. Progeny varied in chromosome number from 2n = 29 to 2n = 35 with no 2n = 28 plants. These aneuploid plants were highly sterile.Key words: Bromus inermis, octoploid, tetraploid, introgression

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14

Castro, Mariana, João Loureiro, Brian C. Husband, and Sílvia Castro. "The role of multiple reproductive barriers: strong post-pollination interactions govern cytotype isolation in a tetraploid–octoploid contact zone." Annals of Botany 126, no. 6 (2020): 991–1003. http://dx.doi.org/10.1093/aob/mcaa084.

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Abstract Background and Aims Polyploidy is an important contributor to sympatric speciation and assortative mating is a key mechanism driving cytotype interactions in contact zones. While strong reproductive barriers can mediate the coexistence of different cytotypes in sympatry, positive frequency-dependent mating disadvantage ultimately drives the transition to single-ploidy populations. However, comprehensive estimates of reproductive isolation among cytotypes and across multiple barriers are rare. We quantify the strength of isolation across multiple reproductive stages in a tetraploid–oct

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15

Davis, Thomas M., Laura M. DiMeglio, Ronghui Yang, Sarah M. N. Styan, and Kim S. Lewers. "Assessment of SSR Marker Transfer from the Cultivated Strawberry to Diploid Strawberry Species: Functionality, Linkage Group Assignment, and Use in Diversity Analysis." Journal of the American Society for Horticultural Science 131, no. 4 (2006): 506–12. http://dx.doi.org/10.21273/jashs.131.4.506.

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The cultivated strawberry, Fragaria ×ananassa Duchesne ex Rozier, originated via hybridization between octoploids F. chiloensis (L.) Mill. and F. virginiana Mill. These three octoploid species are thought to share a putative genome composition of AAA`A'BBB`B'. Diploid F. vesca L., is considered to have donated the A genome. Current attention to the development of a diploid model system for strawberry genomics warrants the assessment of simple sequence repeat (SSR) marker transferability between the octoploid and diploid species in Fragaria L. In the present study, 23 SSR primer pairs derived f

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16

Fairey, N. A., and L. P. Lefkovitch. "Ploidy and cultivar group differences in the thousand-seed weight of red fescue (Festuca rubra L.)." Canadian Journal of Plant Science 76, no. 3 (1996): 465–67. http://dx.doi.org/10.4141/cjps96-082.

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Three major cultivar groups of red fescue (Festuca rubra L.) are recognized, viz. strongly creeping and octoploid, slender creeping and hexaploid, and non-creeping and hexaploid (Chewings), but a thousand-seed weight (TSW) of 0.74 g is often used commercially for the species. Based on 12 cultivars/group, the TSW of the strongly creeping group (1.225 g) was significantly higher than the slender creeping group (0.894 g) and the Chewings group (0.936 g); the higher TSW was probably a consequence of the higher ploidy status. The TSW of 0.74 g is not characteristic of many contemporary red fescue c

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17

Ye, Jiali, Yupu Fan, Hui Zhang, et al. "Octoploids Show Enhanced Salt Tolerance through Chromosome Doubling in Switchgrass (Panicum virgatum L.)." Plants 13, no. 10 (2024): 1383. http://dx.doi.org/10.3390/plants13101383.

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Polyploid plants often exhibit enhanced stress tolerance. Switchgrass is a perennial rhizomatous bunchgrass that is considered ideal for cultivation in marginal lands, including sites with saline soil. In this study, we investigated the physiological responses and transcriptome changes in the octoploid and tetraploid of switchgrass (Panicum virgatum L. ‘Alamo’) under salt stress. We found that autoploid 8× switchgrass had enhanced salt tolerance compared with the amphidiploid 4× precursor, as indicated by physiological and phenotypic traits. Octoploids had increased salt tolerance by significa

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18

WEIMARCK, ANNA. "Cytogenetic behaviour in octoploid Triticale." Hereditas 74, no. 1 (2009): 103–18. http://dx.doi.org/10.1111/j.1601-5223.1973.tb01108.x.

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WEIMARCK, ANNA. "Cytogenetic behaviour in octoploid Triticale." Hereditas 80, no. 1 (2009): 121–30. http://dx.doi.org/10.1111/j.1601-5223.1975.tb01506.x.

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20

Jang, Yoon Jeong, Hyeondae Han, and Seonghee Lee. "Agrobacterium-Mediated Transient Expression Methods to Validate Gene Functions in Strawberry (F. × ananassa)." Plants 13, no. 23 (2024): 3290. http://dx.doi.org/10.3390/plants13233290.

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Understanding gene function is important for crop improvement and breeding efforts, especially in a genetically complex polyploid plant species such as the octoploid strawberry. Agrobacterium-mediated transient assays are a widely used tool for investigating gene functions and offer a reliable alternative to stable transformation. However, variability in tissue-specific responses and inconsistent applicability of Agrobacterium-mediated transient assay across diverse plant species can be challenging. In this study, we provide a method utilizing Agrobacterium-mediated transient expression to exa

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21

Zhao, Fengli, Pan Song, Xiangfen Zhang, et al. "Identification of candidate genes influencing anthocyanin biosynthesis during the development and ripening of red and white strawberry fruits via comparative transcriptome analysis." PeerJ 9 (February 2, 2021): e10739. http://dx.doi.org/10.7717/peerj.10739.

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Strawberries are one of the most economically important berry fruits worldwide and exhibit colours ranging from white to dark red, providing a rich genetic resource for strawberry quality improvement. In the present study, we conducted transcriptome analyses of three strawberry cultivars, namely, ‘Benihoppe’, ‘Xiaobai’, and ‘Snow White’, and compared their gene expression profiles. Among the high-quality sequences, 5,049 and 53,200 differentially expressed genes (DEGs) were obtained when comparing the diploid and octoploid strawberry genomes and analysed to identify anthocyanin-related candida

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22

Straathof, T. P., and R. G. Goldy. "In Vitro Germination and Establishment of Some Strawberry Species." HortScience 22, no. 1 (1987): 119–21. http://dx.doi.org/10.21273/hortsci.22.1.119.

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Abstract Seed from three octoploid (2n = 8x = 56) Fragaria species [F. × ananassa Duch., F. chiloensis (L.) Duch., and F. virginiana Duch.] and three diploid (2n = 2x = 14) species (F. vesca L., F. viridis Duch., and F. daltoniana J. Gay) were placed in vitro on water agar (WA) and ex vitro on 1 sand : 1 sphagnum (v/v) mix. Seed of the octoploid species germinated best regardless of medium. Octoploid species also exhibited better establishment on modified Boxus proliferation medium than the diploids. Five in vitro germination media were tested for F. vesca and F. × ananassa. Fragaria × ananass

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Dalbato, A. L., F. Kobza, and L. M. Karlsson. " Effect of polyploidy and pollination methods on capsule and seed set of pansies (Viola × wittrockiana Gams)." Horticultural Science 40, No. 1 (2013): 22–30. http://dx.doi.org/10.17221/51/2012-hortsci.

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&nbsp;Pansy, Viola &times; wittrockiana, is a popular ornamental plant. Effects of polyploidy on phenotype and four pollination methods on capsule and seed set were studied using ten octoploid (2n = 8x) and two hexadecaploid (2n = 16x) genotypes, originating from induced mutagenesis. Principal component analysis, using 19 phenotypic, phenological and physiological characteristics, revealed that hexadecaploids showed larger differences to the corresponding standard cultivars than octoploids. Number of seed per capsule was similar among genotypes. Capsule set with open pollination was 32

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Stewart, Philip J., Dawn H. Bies, and Kevin M. Folta. "(266) Gene Discovery in Octoploid Strawberry." HortScience 40, no. 4 (2005): 1016C—1016. http://dx.doi.org/10.21273/hortsci.40.4.1016c.

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Fragaria ×ananassa, the cultivated octoploid strawberry, is an intensively cultivated fruit crop in which relatively small variations in disease susceptibility and flowering habit can have significant economic impacts. In order to facilitate future studies of the molecular mechansisms governing these characters, we have initiated studies to identify and sequence the strawberry homologs of a number of important genes known to be critical to pathogenesis response and photoperiodism in model systems such as arabidopsis, rice, and tomato. Using the primary Florida cultivar Strawberry Festival, we

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Hummer, Kim E., Jim M. Oliphant, and Nahla V. Bassil. "Flowering Tendencies in Octoploid Strawberry Species." International Journal of Fruit Science 16, sup1 (2016): 249–57. http://dx.doi.org/10.1080/15538362.2016.1195309.

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Liston, Aaron, Na Wei, Jacob A. Tennessen, Junmin Li, Ming Dong, and Tia-Lynn Ashman. "Revisiting the origin of octoploid strawberry." Nature Genetics 52, no. 1 (2019): 2–4. http://dx.doi.org/10.1038/s41588-019-0543-3.

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27

Yin, Liqin, Zhendong Zhu, Xuan Luo, et al. "Genome-Wide Duplication of Allotetraploid Brassica napus Produces Novel Characteristics and Extensive Ploidy Variation in Self-Pollinated Progeny." G3: Genes|Genomes|Genetics 10, no. 10 (2020): 3687–99. http://dx.doi.org/10.1534/g3.120.401493.

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Whole genome duplications (WGDs) have played a major role in angiosperm species evolution. Polyploid plants have undergone multiple cycles of ancient WGD events during their evolutionary history. However, little attention has been paid to the additional WGD of the existing allopolyploids. In this study, we explored the influences of additional WGD on the allopolyploid Brassica napus. Compared to tetraploid B. napus, octoploid B. napus (AAAACCCC, 2n = 8x =76) showed significant differences in phenotype, reproductive ability and the ploidy of self-pollinated progeny. Genome duplication also alte

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Manivannan, Abinaya, Koeun Han, Sun Yi Lee, et al. "Genome-Wide Analysis of MYB10 Transcription Factor in Fragaria and Identification of QTLs Associated with Fruit Color in Octoploid Strawberry." International Journal of Molecular Sciences 22, no. 22 (2021): 12587. http://dx.doi.org/10.3390/ijms222212587.

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The genus Fragaria encompass fruits with diverse colors influenced by the distribution and accumulation of anthocyanin. Particularly, the fruit colors of strawberries with different ploidy levels are determined by expression and natural variations in the vital structural and regulatory genes involved in the anthocyanin pathway. Among the regulatory genes, MYB10 transcription factor is crucial for the expression of structural genes in the anthocyanin pathway. In the present study, we performed a genome wide investigation of MYB10 in the diploid and octoploid Fragaria species. Further, we identi

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JACKSON, J. A., and R. C. TINSLEY. "Evolutionary diversity in polystomatids infecting tetraploid and octoploid Xenopus in East African highlands: biological and molecular evidence." Parasitology 134, no. 9 (2007): 1223–35. http://dx.doi.org/10.1017/s0031182007002648.

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SUMMARYSpecies of Protopolystoma are monogenean flukes that only infect allopolyploid hosts in the anuran genus Xenopus. Multivariate analyses of morphometric sclerite characters in the nominal species Protopolystoma simplicis suggest that morphologically distinguishable populations occur in the tetraploid host, Xenopus laevis victorianus, and in each of the octoploid hosts, X. vestitus and X. wittei. The species-level divergence of a lineage specific to X. laevis is supported by sequence variation in the mitochondrial cytochrome c oxidase subunit 1 (cox1) gene. Protopolystoma simplicis from X

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Li, Qingling, Yuesheng Yang, and Hong Wu. "In Vitro Segregation of Tetraploid and Octoploid Plantlets from Colchicine-induced Ploidy Chimeras in Echinacea purpurea L." HortScience 51, no. 5 (2016): 549–57. http://dx.doi.org/10.21273/hortsci.51.5.549.

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Echinacea purpurea L. is one of the important ornamental and medicinal plant species. Ploidy manipulation is a valuable tool for improving plant quality or production in E. purpurea as well as in many other plants. To study the segregation of pure ploidy plantlets from colchicine-induced ploidy chimeras in E. purpurea, we used a chimera plantlet that consisted of 1.93% diploid, 35.04% tetraploid, and 63.03% octoploid cells as the source material for experiments. The results showed that three factors significantly influenced the segregation, i.e., the component ratios of different ploidy cells

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Kumar, P. S., and P. D. Walton. "Plant regeneration and chromosome instability in tissue culture of Elymus canadensis × E. trachycaulus F1 hybrid." Genome 35, no. 1 (1992): 88–91. http://dx.doi.org/10.1139/g92-015.

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Callus was induced from pieces of immature inflorescence of a sterile F1 hybrid (2n = 4x = 28) between Elymus canadensis and E. trachycaulus on MS medium supplemented with 2 mg/L of 2,4-D. Calli were of two types: compact or soft. Regeneration occurred predominantly from the compact callus. Although some plantlets were obtained on the callus initiation medium, the frequency of regeneration increased considerably when the callus was transferred to an auxin-free MS medium. Deliberate aging of callus induced cytological instability and variation in chromosome number of the regenerants. Five of th

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Zhang, Hai-Qin, Xue Bai, Bao-Rong Lu, Henry E. Connor, and Yong-Hong Zhou. "Genomic constitution of the allo-octoploid Elymus tenuis (Poaceae: Triticeae) of New Zealand." Australian Systematic Botany 23, no. 5 (2010): 381. http://dx.doi.org/10.1071/sb10014.

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Elymus tenuis (Buch.) Á.Löve et Connor is a perennial octoploid (2n = 56) wheatgrass endemic to New Zealand. To investigate its genomic constitution, four artificial interspecific hybrids between E. tenuis and E. enysii (2n = 4x = 28, HW), and E. solandri (2n = 6x = 42, StYW) and E. multiflorus (2n = 6x = 42, StYW) were studied cytologically. Meioses in pollen mother cells (PMCs) of the hybrids showed relatively high chromosome pairing, with an average of 13.50 in E. enysii × E. tenuis, 20.22 in E. solandri × E. tenuis, 19.62 in E. multiflorus × E. tenuis, and 20.00 in E. tenuis × E. multiflor

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Sabitov, Andrey, Kim E. Hummer, and Tom Davis. "Iturup and Sakhalin Island Strawberries." HortScience 40, no. 4 (2005): 1127A—1127. http://dx.doi.org/10.21273/hortsci.40.4.1127a.

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A plant-collecting expedition to Iturup and Sakhalin Islands, Russian Federation, occurred between 21 July and 12 Sept. 2003. Actinidia, Rubus, Ribes, and Vaccinium, as well as seven accessions of strawberries, Fragaria L., were collected. Among them, a wild strawberry, Fragaria iturupensis Staudt, was collected on the eastern slope of Atsonupuri Volcano, Iturup Island, at 630 and 650 m elevation. This species was similar in habit, leaf color and overall appearance to the American strawberry species F. virginiana Mill. Fruits were bright red, oblate spherical, about 1.4 cm in diameter, and had

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Stabler, Margaret M., J. J. Luby, and P. D. Ascher. "FRAGARIA GERMPLASM FROM MINNESOTA AND WISCONSIN." HortScience 25, no. 9 (1990): 1141G—1141. http://dx.doi.org/10.21273/hortsci.25.9.1141.

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Introgression of Fragaria vesca, the diploid wild strawberry, and F. × ananassa, the octoploid cultivated strawberry, into octoploid F. virginiana collected from Minnesota and Wisconsin was suggested by gynodioecy and cluster analysis. Nine morphological traits separated collections into two main clusters, one associated with the northern hardwoods, and the other in the prairie-forest floristic province. Under field conditions, wild female clones were rated similarly to check cultivars for fruit set and plant productivity but always significantly higher than wild hermaphrodites, Increases in y

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Stabler, Margaret M., J. J. Luby, and P. D. Ascher. "FRAGARIA GERMPLASM FROM MINNESOTA AND WISCONSIN." HortScience 25, no. 9 (1990): 1141g—1141. http://dx.doi.org/10.21273/hortsci.25.9.1141g.

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Introgression of Fragaria vesca, the diploid wild strawberry, and F. × ananassa, the octoploid cultivated strawberry, into octoploid F. virginiana collected from Minnesota and Wisconsin was suggested by gynodioecy and cluster analysis. Nine morphological traits separated collections into two main clusters, one associated with the northern hardwoods, and the other in the prairie-forest floristic province. Under field conditions, wild female clones were rated similarly to check cultivars for fruit set and plant productivity but always significantly higher than wild hermaphrodites, Increases in y

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Ganapathi, A., and G. R. Rao. "Nature of sterility and mechanism of the evolution of higher ploidy in Solanum section Solanum (Maurella)." Canadian Journal of Genetics and Cytology 28, no. 6 (1986): 1044–48. http://dx.doi.org/10.1139/g86-146.

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Cytomorphology of solanum nigrum L. (2n = 6x = 72) and S. americanum Mill. (2n = 2x = 24) was studied. Crosses were made between these two species, but crosses were successful only when the higher ploidy form was used as the maternal parent. The F1 hybrid was a tetraploid (2n = 4x = 48) and showed highly irregular meiosis. It did not set fruit either on selfing or on open pollination. A fertile octoploid branch spontaneously grew from the sterile hybrid. The octoploid had regular meiosis and produced several fruits with viable seeds. Pollen stainability was 82%. From cytological studies of the

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Angulo, Maria Betiana, and Massimiliano Dematteis. "Lessingianthus concepcionis (Asteraceae, Vernonieae), a new octoploid species endemic to northern Paraguay." Phytotaxa 265, no. 3 (2016): 267–72. https://doi.org/10.11646/phytotaxa.265.3.7.

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Angulo, Maria Betiana, Dematteis, Massimiliano (2016): Lessingianthus concepcionis (Asteraceae, Vernonieae), a new octoploid species endemic to northern Paraguay. Phytotaxa 265 (3): 267-272, DOI: 10.11646/phytotaxa.265.3.7, URL: http://dx.doi.org/10.11646/phytotaxa.265.3.7

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Mo, Lan, Junhao Chen, Xiongzhen Lou, et al. "Colchicine-Induced Polyploidy in Rhododendron fortunei Lindl." Plants 9, no. 4 (2020): 424. http://dx.doi.org/10.3390/plants9040424.

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Polyploidy in Rhododendron fortunei has great potential to improve its horticultural and commercial value, and to also meet market demands. In this study, a feasible method for polyploid induction in R. fortunei via colchicine treatment was established, and the obtained polyploid plants were identified and characterized. As a result, the stem bases of tissue-cultured plantlets treated with 0.1% colchicine for 24 h showed the highest polyploid induction with a rate of 36.67%. By flow cytometric analysis, 69 tetraploids and 29 octoploids were identified in the regenerated plants that were examin

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Klisch, Karl, Preben D. Thomsen, Vibeke Dantzer, and Rudolf Leiser. "Genome multiplication is a generalised phenomenon in placentomal and interplacentomal trophoblast giant cells in cattle." Reproduction, Fertility and Development 16, no. 3 (2004): 301. http://dx.doi.org/10.1071/rd03101.

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The frequency of polyploidisation in bovine binucleate trophoblast giant cells (TGC) from placentomes (PL) and the interplacentomal allantochorion (AL) of six male fetuses with a crown–rump length between 3.5 and 103 cm was determined by in situ hybridisation with a chromosome-7-specific probe, using a probe specific for the Y chromosome to distinguish between maternal and fetal nuclei. The results showed that polyploid nuclei were essentially always of fetal origin. The frequency of tetraploid nuclei varied between 3% and 15% in both the placentomal and interplacentomal samples, with mean fre

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Ahmadi, Hamid, and Royce S. Bringhurst. "Breeding Strawberries at the Decaploid Level." Journal of the American Society for Horticultural Science 117, no. 5 (1992): 856–62. http://dx.doi.org/10.21273/jashs.117.5.856.

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Two groups of Fragaria decaploid (2n = 70, x = 7) breeding populations were studied. The first was derived from pentaploid (2n = 35) and hexaploid (2n = 42) natural or synethetic interspecific hybrids between octoploid (2n = 56) F. chiloensis (L.) Duch. or F. virginiana Duch. both from California, and various Fragaria diploids (2n = 14). Their chromosome number was doubled with colchicine or through the naturally generated unreduced gametes. They were selfed repetitively, intercrossed, and open pollinated. Gametic viability of the hermaphroditic and female decaploid hybrids exceeded 50%. The h

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Massa, Alicia N., Kevin B. Jensen, Steve R. Larson, and David J. Hole. "Morphological variation in Bromus sect. Ceratochloa germplasm of Patagonia." Canadian Journal of Botany 82, no. 1 (2004): 136–44. http://dx.doi.org/10.1139/b03-133.

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South American representatives of Bromus sect. Ceratochloa make up a morphologically diverse group of grasses indigenous to the southern Andes of Argentina and Chile. The objectives of the present study were to describe patterns of morphological variation among 30 accessions representing six species (Bromus catharticus Vahl, Bromus coloratus Steud., Bromus lithobius Trin., Bromus mango E. Desv., Bromus stamineus E. Desv., and Bromus tunicatus Phil.) in a common garden, correlate morphological and previously obtained molecular data, and develop a taxonomic treatment within sect. Ceratochloa of

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Chen, Xiaodong, Weijian Cai, Jin Xia, et al. "Integration of ATAC-Seq and RNA-Seq Reveals the Role of FaTIP1 in Red Light-Induced Fruit Ripening in Strawberry." International Journal of Molecular Sciences 26, no. 2 (2025): 511. https://doi.org/10.3390/ijms26020511.

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Light is an important environmental factor affecting the ripening and quality of strawberry fruit. Previous studies have shown that red light treatment can promote strawberry ripening. Gene expression is closely associated with chromatin openness, and changes in chromatin accessibility are crucial for the binding of transcription factors to downstream regulatory sequences. However, the changes in chromatin accessibility in response to different light treatments in octoploid strawberry plants are still unclear. In this study, the landscape of chromatin accessibility of octoploid strawberry unde

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Honjo, Masanori, Susumu Yui, and Miyuki Kunihisa. "Observation of the Disomic Inheritance of Four Allelic Pairs in the Octoploid Cultivated Strawberry." HortScience 48, no. 8 (2013): 948–54. http://dx.doi.org/10.21273/hortsci.48.8.948.

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Although recent genetic studies suggest that octoploid cultivated strawberry, Fragaria ×ananassa Duch., is highly diploidized, there have been no reports that directly and clearly described the behavior of four allelic pairs. In this study, we demonstrated the disomic inheritance of four allelic pairs in F. ×ananassa by using two highly polymorphic simple sequence repeat markers. By genotyping the offspring of ‘Summer-princess’ (containing eight distinct alleles of marker FxaHGA02P13) × ‘Dekoruju’ (containing another four distinct alleles for this marker), four allelic pairs could be identifie

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Azizi, Nadjat, Rachid Amirouche, and Nabila Amirouche. "Karyological investigations and new chromosome number reports in Bellevalia Lapeyrouse, 1808 and Muscari Miller, 1758 (Asparagaceae) from Algeria." Comparative Cytogenetics 10, no. (1) (2016): 171–87. https://doi.org/10.3897/CompCytogen.v10i1.6445.

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Karyological investigations were carried out on four species of Bellevalia Lapeyrouse, 1808 and Muscari Miller, 1758 (Asparagaceae) sampled in contrasting bioclimatic conditions of Algeria. The endemic B. mauritanica Pomel, 1874 was found to have a tetraploid cytotype 2n = 4x = 16 and an octoploid 2n = 8x = 32 which is a new report. The chromosome number 2n = 2x = 18 in M. comosum (Linnaeus, 1753) Miller, 1768 and M. maritimum Desfontaines, 1798 was in conformity with earlier reports. The latter species reveals a lesser bimodality of the karyotype. Within M. neglectum Gussone ex Tenore, 1842 p

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Luebke, Neil T., and Jessica M. Budke. "Isoëtes tennesseensis(Isoëtaceae), an Octoploid Quillwort from Tennessee." American Fern Journal 93, no. 4 (2003): 184–90. http://dx.doi.org/10.1640/0002-8444(2003)093[0184:itiaoq]2.0.co;2.

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Howard, Leighan, Philip Stewart, Amit Dhingra, Craig Chandler, and Kevin Folta. "(267) A Rapid Transformation System for Octoploid Strawberry." HortScience 40, no. 4 (2005): 1016D—1016. http://dx.doi.org/10.21273/hortsci.40.4.1016d.

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Cultivated strawberry (Fragari×ananassa) is a valuable crop, yet has benefitted little from recent advances in biotechnology and genomics. A high-throughput system for transformation and regeneration would hasten elucidation of gene function for strawberry and possibly the Rosaceae in general. In this report, a protocol for high-frequency octoploid strawberry transformation and regeneration is presented. The protocol uses leaf, petiole, and stolon as explants from a newly selected genotype, `Laboratory Festival #9'. This genotype was selected from progeny of a `Strawberry Festival' self-cross

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MOUSTAKAS, MICHAEL. "Genome relationships between octoploid and decaploid Thinopyrum ponticum." Botanical Journal of the Linnean Society 112, no. 2 (1993): 149–57. http://dx.doi.org/10.1111/j.1095-8339.1993.tb00314.x.

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Yakushiji, Hiroshi, Atsu Yamasaki, and Ryotaro Nishimura. "Dwarf heptaploids derived from octoploid ‘Hasshu’ × hexaploid persimmons." Scientia Horticulturae 338 (December 2024): 113609. http://dx.doi.org/10.1016/j.scienta.2024.113609.

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Hancock, J. F., S. C. Hokanson, C. E. Finn, and K. E. Hummer. "INTRODUCING A SUPERCORE COLLECTION OF WILD OCTOPLOID STRAWBERRIES." Acta Horticulturae, no. 567 (January 2002): 77–79. http://dx.doi.org/10.17660/actahortic.2002.567.6.

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Katsiotis, A., and R. A. Forsberg. "Production and cytogenetics of tetraploid-octoploid Avena hybrids." Plant Breeding 114, no. 2 (1995): 137–43. http://dx.doi.org/10.1111/j.1439-0523.1995.tb00778.x.

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