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Articles de revues sur le sujet « Panicle development »

Auteur : Grafiati

Publié le 9 mars 2023

Mis à jour le 31 juillet 2025

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1

Asha and Bineeta Singh. "Studies on Variability, Heritability, and Genetic Advance in Paddy (Oryza sativa L.) with Special Reference to Satna, Madhya Pradesh." International Journal of Plant & Soil Science 35, no. 24 (2023): 35–40. http://dx.doi.org/10.9734/ijpss/2023/v35i244294.

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Fourteen diverse cultivars of paddy grown in a Randomized Block Design (RBD) at AKS University, Satna, during Kharif season on July 2022. Data were collected foreleven quantitative traits and estimated forvariance,genetic variability, heritability and genetic advance.The design of the experiment indicated highly significant differences for all the characters due to treatments. The analysis of variance indicated the existence of sufficient amount of variability among genotypes for all the studiedcharacters. The maximum GCV along with PCV was observed forgrain yield per plant (g) followed by pan

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Dai, Dongqing, Huali Zhang, Lei He, et al. "Panicle Apical Abortion 7 Regulates Panicle Development in Rice (Oryza sativa L.)." International Journal of Molecular Sciences 23, no. 16 (2022): 9487. http://dx.doi.org/10.3390/ijms23169487.

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The number of grains per panicle significantly contributes to rice yield, but the regulatory mechanism remains largely unknown. Here, we reported a loss-of-function mutant, panicle apical abortion 7 (paa7), which exhibited panicle abortion and degeneration of spikelets on the apical panicles during the late stage of young panicle development in rice. High accumulations of H2O2 in paa7 caused programmed cell death (PCD) accompanied by nuclear DNA fragmentation in the apical spikelets. Map-based cloning revealed that the 3 bp “AGC” insertion and 4 bp “TCTC” deletion mutation of paa7 were located

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Xu, Tingting, Debao Fu, Xiaohu Xiong, et al. "OsbHLH067, OsbHLH068, and OsbHLH069 redundantly regulate inflorescence axillary meristem formation in rice." PLOS Genetics 19, no. 4 (2023): e1010698. http://dx.doi.org/10.1371/journal.pgen.1010698.

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Rice axillary meristems (AMs) are essential to the formation of tillers and panicle branches in rice, and therefore play a determining role in rice yield. However, the regulation of inflorescence AM development in rice remains elusive. In this study, we identified no spikelet 1-Dominant (nsp1-D), a sparse spikelet mutant, with obvious reduction of panicle branches and spikelets. Inflorescence AM deficiency in nsp1-D could be ascribed to the overexpression of OsbHLH069. OsbHLH069 functions redundantly with OsbHLH067 and OsbHLH068 in panicle AM formation. The Osbhlh067 Osbhlh068 Osbhlh069 triple

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Chamberlin, J. R., and J. N. All. "Influence of Panicle Maturity on Infestation of Grain Sorghum by Corn Earworm and Sorghum Webworm (Lepidoptera: Noctuidae) in Georgia." Journal of Entomological Science 26, no. 4 (1991): 419–24. http://dx.doi.org/10.18474/0749-8004-26.4.419.

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The influence of panicle maturity on oviposition by the corn earworm, Helicoverpa zea (Boddie), and sorghum webworm, Celama sorghiella (Riley), was investigated on grain sorghum in Georgia during 1986 and 1987. Stage of panicle development, density of corn earworm and sorghum webworm, and egg parasitism by Trichogramma spp. were recorded at 2–3 day intervals in three field tests. Sorghum webworm and corn earworm began oviposition as panicles emerged from the boot. Oviposition peaked 4–8 days later, near the time panicles began anthesis, but then declined quite rapidly. Oviposition by sorghum w

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Pierre, Brissé Labré, Kra Kouamé Daniel, Toualy Marie Noel Y, and Kouakou Yadom Yao François Regis. "Assessing the Impact and Causes of Rice Panicle Necrosis in Côte d’Ivoire." International Journal of Plant & Soil Science 36, no. 8 (2024): 917–30. http://dx.doi.org/10.9734/ijpss/2024/v36i84922.

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Rice is a staple food for millions of people around the world, particularly in Côte d'Ivoire. Its production is subject to numerous biotic constraints, including rice panicle necrosis. Rice panicle necrosis, previously neglected, has taken on worrying proportions in Côte d'Ivoire's rice-growing basins over the past half decade. The aim of this study is to diagnose rice panicle necrosis in Côte d'Ivoire. A phytosanitary survey was conducted in rice-growing basins across three agroecological zones of Côte d'Ivoire in order to describe the symptoms of rice panicle necrosis and assess its importan

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Menzel, CM, and DR Simpson. "Flowering and fruit set in lychee (Litchi chinensis Sonn.) in subtropical Queensland." Australian Journal of Experimental Agriculture 32, no. 1 (1992): 105. http://dx.doi.org/10.1071/ea9920105.

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The pattern of panicle and flower development of lychee (Litchi chinensis Sonn.) trees was studied in subtropical Queensland (lat. 27�S.). The cultivars studied were Tai So at 3 sites, Bengal at 4 sites, Kwai May Pink at 2 sites, Salathiel at 3 sites, and Wai Chee at 2 sites. Tai So was the earliest cultivar, with panicle emergence in late May and flower anthesis in mid September. The other cultivars were 5-7 weeks later. Tai So had a longer period of flower anthesis than the other cultivars (4 weeks v. 1-3 weeks). Cultivars Tai So and Bengal generally had longer panicles than cvv. Kwai May Pi

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ABBASI, M. F., A. U. DIN, and F. M. ABBASI. "DEVELOPMENT OF NEW RICE STRAIN WITH IMPROVED SINK SIZE AND SOURCE CAPACITY USING A MULTI-PARENT ADVANCED GENERATION INTERCROSS (MAGIC) APPROACH." SABRAO Journal of Breeding and Genetics 54, no. 5 (2022): 963–75. http://dx.doi.org/10.54910/sabrao2022.54.5.1.

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A new rice strain that grows six feet tall with four times higher potential yield than the conventionally bred variety, JP5, was developed using the MAGIC approach. This new rice type underwent analysis on sink size and source capacity traits, including superior and inferior spikelets, vascular bundles of panicle neck and stem internode, tillering pattern, grain filling pattern, yield, and other morphological attributes. Results indicated that the new strain had more vascular bundles of the stem (42) and panicle neck (35), primary rachis branches of panicle (16.1), superior spikelets, and grea

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Hastini, Tri, Irma Noviana, Yati Haryati, et al. "Panicle branching behaviour of rice Inpari IR Nutri Zinc." E3S Web of Conferences 316 (2021): 03002. http://dx.doi.org/10.1051/e3sconf/202131603002.

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As a staple food, rice can be used as a bio fortification. For this necessity, Indonesian Agency for Agriculture Research and Development (IAARD) developed rice variety which was rich of Zn content to overcome child stunting. To understand the panicle branching behavior of Inpari IR Nutri Zinc, we collected panicle branching data from different sites and agronomical practices. Data were collected from three locations in West Java, i.e Cianjur, Majalengka, and Ciamis during May until October 2020. Among sites showed a significant differences of panicle branching. The best performance of Inpari

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Zhang, Qiguang, Jie Sun, Longping Wang, Jun Chen, Jian Ke, and Liquan Wu. "Effects of Nitrogen Application at Different Panicle Development Stages on the Panicle Structure and Grain Yield in Hybrid Indica Rice Cultivars." Agronomy 15, no. 3 (2025): 595. https://doi.org/10.3390/agronomy15030595.

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To increase the seed setting rate and yield of large-panicle rice varieties, one agronomic and breeding strategy is to increase the proportion of spikelets in the middle portion of the panicle as many of the lower spikelets fail to produce grains. Current nitrogen management during panicle development mainly focuses on fertilization at the emergence of the top fourth leaf, which increases the number of secondary branch spikelets on the lower part of the panicle. Two-year field experiments were conducted in 2021 and 2022 with two typical large-panicle hybrid indica rice cultivars, IIYM86 and JL

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Gaballah, Mahmoud, Hassan Hamad, Atif Bamagoos, et al. "Flowering Synchronization in Hybrid Rice Parental Lines at Different Sowing Dates." Sustainability 13, no. 6 (2021): 3229. http://dx.doi.org/10.3390/su13063229.

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Hybrid seed set on the female line depends primarily on its flowering synchronization with the restorer line (R), therefore, the sowing of male and female lines must be planned properly to achieve this. Field experiments on different sowing dates (May 1st, May 15th, and May 30th) of R lines (Giza 178R, Giza 179R, and Giza 181R) and cytoplasmic male sterile (CMS) lines (IR69625A, IR70368A, IR58025A, K17A, and G46A) were carried out at the farm of Sakha Agricultural Research Station, Kafr El-Sheikh, Egypt during 2019 and 2020 to study the effect of sowing dates on flowering synchronization in hy

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BROWNE, R. A., E. M. WHITE, and J. I. BURKE. "Responses of developmental yield formation processes in oats to variety, nitrogen, seed rate and plant growth regulator and their relationship to quality." Journal of Agricultural Science 144, no. 6 (2006): 533–45. http://dx.doi.org/10.1017/s0021859606006538.

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Outcomes of developmental yield formation processes in oats, namely number of panicles/m2, number of grains/panicle, mean grain weight and incidences of aborted and tertiary grains, were measured in a series of experiments in Northern Ireland and the Republic of Ireland in 1997/98 and 1998/99. Seed rate (200 and 300 seeds/m2), nitrogen (0–200 kg/ha) and plant growth regulator (chlormequat chloride) treatments were applied to the spring oat varieties Aberglen and Barra in one spring- and two autumn-sown experiments, and to the winter varieties Gerald and Image in one autumn-sown experiment. Lar

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Xi, Te, Huaiqu Feng, Yongwei Wang, et al. "Optimizing the Working Parameters of Pneumatic Pollinators Based on the Kinematic Properties of Rice Panicles." Journal of the ASABE 66, no. 1 (2023): 65–74. http://dx.doi.org/10.13031/ja.15308.

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Highlights An experimental platform for the kinematic characteristics of panicles was constructed. A regression model for the kinematic characteristics of panicles and working parameters was established. The multi-objective optimization based on the kinematic characteristics of rice panicles was carried out. The optimized combination of working parameters was verified by field pollination experiments. Abstract. Pollen shedding and dispersal processes are inextricably linked to the movement state of hybrid rice panicles. The purpose of this work was to study the effect of the working parameters

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Wang, Yaliang, Yikai Zhang, Qiang Zhang, et al. "Comparative transcriptome analysis of panicle development under heat stress in two rice (Oryza sativa L.) cultivars differing in heat tolerance." PeerJ 7 (August 29, 2019): e7595. http://dx.doi.org/10.7717/peerj.7595.

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Heat stress inhibits rice panicle development and reduces the spikelet number per panicle. This study investigated the mechanism involved in heat-induced damage to panicle development and spikelet formation in rice cultivars that differ in heat tolerance. Transcriptome data from developing panicles grown at 40 °C or 32 °C were compared for two rice cultivars: heat-tolerant Huanghuazhan and heat-susceptible IR36. Of the differentially expressed genes (DEGs), 4,070 heat stress-responsive genes were identified, including 1,688 heat-resistant-cultivar-related genes (RHR), 707 heat-susceptible-cult

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He, Dong, Rui Liang, Tuan Long, Ying Yang, and Changyin Wu. "Rice RBH1 Encoding A Pectate Lyase is Critical for Apical Panicle Development." Plants 10, no. 2 (2021): 271. http://dx.doi.org/10.3390/plants10020271.

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Panicle morphology is one of the main determinants of the rice yield. Panicle abortion, a typical panicle morphological defect results in yield reduction due to defective spikelet development. To further elucidate the molecular mechanism of panicle abortion in rice, a rice panicle bald head 1 (rbh1) mutant with transfer DNA (T-DNA) insertion showing severely aborted apical spikelets during panicle development was identified and characterized. The rbh1-1 mutant showed obviously altered cell morphology and structure in the degenerated spikelet. Molecular genetic studies revealed that RBH1 encode

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Chanon, Ann M., Pablo S. Jourdan, and Joseph C. Scheerens. "(233) Comparison of Inflorescence Morphology, Anthesis and Floral Sex Expression in Bottlebrush and Red Buckeye." HortScience 41, no. 4 (2006): 1020B—1020. http://dx.doi.org/10.21273/hortsci.41.4.1020b.

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As a prelude to interspecific hybridization, we compared the floral biology of bottlebrush buckeye (Aesculus parviflora) and red buckeye (A. pavia) by examining inflorescence morphology, pattern of floral anthesis, sex expression, and the effects of panicle decapitation on complete flower development. Inflorescences of both species (n = 1606) were randomly selected and analyzed for length, total number of flowers and complete flower number and location. The pattern of anthesis was observed in four genotypes using 10–30 inflorescences per plant. For each flower, its date of anthesis, position o

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Suaib, Suaib, Woerjono Mangoendidjojo, PDN Mirzawan, and Ari Indrianto. "PROPORSI MIKROSPORA UNINUKLEAT PADA EMPAT KLON TEBU (Saccharum spp.)." Berkala Penelitian Hayati 12, no. 2 (2007): 145–52. http://dx.doi.org/10.23869/bphjbr.12.2.20078.

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An experiment to study the two different morphological characters of four clones of sugarcane (Saccharum spp.) panicles containing more than 50 percent of uninucleate microspore development was conducted in Tissue Culture Laboratory at Biology Faculty, Gadjah Mada University, Yogyakarta, since March until May 2006. Morphological characters of both kinds of panicles i.e. unsheated- and sheated flowers from sheat flag leaf were observed. Mean, percentage, and standard deviation from the mean value of the six different stages of microspore development e.g. tetrad, early- and late-uninucleate, ear

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Li, Guan, Yichen Cheng, Man Yin, Jinyu Yang, Jiezheng Ying, and Changlan Zhu. "Detection of QTLs for panicle-related traits using an indica × japonica recombinant inbred line population in rice." PeerJ 9 (November 29, 2021): e12504. http://dx.doi.org/10.7717/peerj.12504.

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Background The panicle is the most important organ in rice, and all the panicle-related traits are correlated with rice grain yield. Understanding the underlying genetic mechanisms controlling panicle development is very important for improving rice production. Methods Nine panicle-related traits including heading date, panicle length, number of primary branches, number of secondary branches, number of grains per panicle, number of panicles per plant, number of filled grains per plant, seed-setting rate, and grain yield per plant were investigated. To map the quantitative trait loci (QTLs) for

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Gladman, Nicholas, Yinping Jiao, Young Koung Lee, et al. "Fertility of Pedicellate Spikelets in Sorghum Is Controlled by a Jasmonic Acid Regulatory Module." International Journal of Molecular Sciences 20, no. 19 (2019): 4951. http://dx.doi.org/10.3390/ijms20194951.

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As in other cereal crops, the panicles of sorghum (Sorghum bicolor (L.) Moench) comprise two types of floral spikelets (grass flowers). Only sessile spikelets (SSs) are capable of producing viable grains, whereas pedicellate spikelets (PSs) cease development after initiation and eventually abort. Consequently, grain number per panicle (GNP) is lower than the total number of flowers produced per panicle. The mechanism underlying this differential fertility is not well understood. To investigate this issue, we isolated a series of ethyl methane sulfonate (EMS)-induced multiseeded (msd) mutants t

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Nandini, A., M. Venkatesan, D. Sathyaraj, and M. S. Aneesa Rani. "Genetic correlation, path and multivariate analysis in rice under coastal saline ecosystem of Tamil Nadu." Journal of Environmental Biology 46, no. 4 (2025): 546–54. https://doi.org/10.22438/jeb/46/4/mrn-5436.

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Aim: The present experiment was investigated to elucidate the correlation and their interrelationship among different characteristics and evaluate the direct and indirect impact traits of rice genotypes under east coastal region of Chidambaram, Tamil Nadu (India). Methodology: The study was conducted under the coastal saline ecosystem at the Plant Breeding Farm, Department of Genetics and Plant Breeding, Annamalai University, during the major planting season of 2022-23. The experiment was laid out in a Randomized Block Design with three replicates. Results: Character association analysis indic

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Fraga, Thiago Isquierdo, Felipe de Campos Carmona, Ibanor Anghinoni, Silvio Aymone Genro Junior, and Elio Marcolin. "Flooded rice yield as affected by levels of water salinity in different stages of its cycle." Revista Brasileira de Ciência do Solo 34, no. 1 (2010): 175–82. http://dx.doi.org/10.1590/s0100-06832010000100018.

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Losses of productivity of flooded rice in the State of Rio Grande do Sul, Brazil, may occur in the Coastal Plains and in the Southern region due to the use of saline water from coastal rivers, ponds and the Laguna dos Patos lagoon, and the sensibility of the plants are variable according to its stage of development. The purpose of this research was to evaluate the production of rice grains and its components, spikelet sterility and the phenological development of rice at different levels of salinity in different periods of its cycle. The experiment was conducted in a greenhouse, in pots filled

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Mallik, S., A. M. Aguilar, and B. S. Vergara. "Rice Panicle Characteristics." International Rice Research Newsletter 13, no. 5 (1988): 7–8. https://doi.org/10.5281/zenodo.7136471.

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This article 'Rice Panicle Characteristics' 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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Ramadhan, Fitrah, Willy Bayuardi Suwarno, Anggi Nindita, and Dan Hajrial Aswidinnoor. "Analisis Genetik Arsitektur Malai Padi Menggunakan Dua Populasi F2." Jurnal Agronomi Indonesia (Indonesian Journal of Agronomy) 46, no. 1 (2018): 1. http://dx.doi.org/10.24831/jai.v46i1.17265.

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<em>Improvement of rice panicle architecture is one important objective in the development of improved new-plant-type rice varieties. Panicle architecture is directly related to yield components in rice. The aims of this study were to obtain information on inheritance pattern of panicle architecture on F2 generation and to obtain the best selected individuals. The experiment was conducted at Sawah Baru Experimental Farm Bogor, from May to October 2016. Two F2 populations derived from crosses of IPB 3S/IPB160-F-36, IPB160-F-36/IPB 5R and three genotypes of parents were used as experimenta

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MANJARREZ-SANDOVAL, PEDRO, VÍCTOR A. GONZÁLEZ-HERNÁNDEZ, LEOPOLDO E. MENDOZA-ONOFRE, and E. M. ENGLEMAN. "DROUGHT STRESS EFFECTS ON THE GRAIN YIELD AND PANICLE DEVELOPMENT OF SORGHUM." Canadian Journal of Plant Science 69, no. 3 (1989): 631–41. http://dx.doi.org/10.4141/cjps89-079.

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Many studies have reported responses to drought stress in sorghum (Sorghum bicolor (L.) Moench) but little is known about its effects on panicle development. To determine the stage of development most susceptible to water deficiency, in terms of grain yield components, eight plants of two sorghum lines were subjected to each of 10 single, successive drought stress treatments covering the entire life cycle. In each stress treatment, water was withheld until half of the plants remained wilted at sunrise. Effects on panicle development were also studied. Single sorghum plants were grown in pots c

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Craufurd, P. Q., D. J. Flower, and J. M. Peacock. "Effect of Heat and Drought Stress on Sorghum (Sorghum Bicolor). I. Panicle Development and Leaf Appearance." Experimental Agriculture 29, no. 1 (1993): 61–76. http://dx.doi.org/10.1017/s001447970002041x.

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SummarySeven sorghum lines, flowering from 50 to 87 days after sowing, were subjected to early drought stress, late stress, and both early and late stress in the field during the dry season in India. Panicle initiation was delayed by 2–25 days and flowering by 1–59 days by the drought stress treatments, the greatest effect being in the treatment subjected to both early and late stress. Stress increased the period between panicle initiation and flowering by retarding the rate of panicle development; when stress was severe panicle development stopped. Upon relief of stress following irrigation,

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Sutoro, NFN, Tintin Suhartini, Mamik Setyowati, and Kurniawan R. Trijatmiko. "Keragaman Malai Anakan dan Hubungannya dengan Hasil Padi Sawah (Oryza sativa)." Buletin Plasma Nutfah 21, no. 1 (2016): 9. http://dx.doi.org/10.21082/blpn.v21n1.2015.p9-16.

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<p>Morpho-physiological and yield components of rice are important character that affect the crop yield potential. Seeds as a sink of crops, its yield are very much determined by the panicle yield components, one of which is various type of tillers. The purpose of the research was to study the variability of panicle types andtheir relationshipwith grain yield of rice. Thirty rice varieties/lines were planted and observed in experimental pots. The study revealed that there are differencesin total number of panicle among varieties or lines. Average number of panicle ranges from 20&amp;

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Marie-Noel, Melie Feyem, Bell Martin Joseph, Tanzi Liliane, Foncha Felix, Malaa Dorothy, and Djouffo Prince Salvador. "Effect of Plant Spacing on the Growth and Yield of Rainfed Rice (Oryza Sativa) in the Bimodal Rain Forest Zone of Cameroon." Journal of Agriculture and Crops, no. 72 (February 13, 2021): 48–59. http://dx.doi.org/10.32861/jac.72.48.59.

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A study was carried out on plant density at the experimental field of the Institute of Agricultural Research for Development (IRAD) Nkolbisson, Yaoundé to determine the appropriate spacing to improve rainfed rice production in the bimodal rainfall forest zone of Cameroon. The experiment was conducted during the main cropping seasons of 2017 and 2018. The planting spacing used were 15cm x 15cm, 20cm x 20cm, 25cm x 25cm and 30cm x 30cm giving the plant populations of 444444, 250000, 160,000 and 111,111 plants / ha respectively using two varieties (Nerica 3 and Nerica 8). The experiment was laid

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Mohapatra, Pravat Kumar, Pradeep Kumar Naik, and Rajesh Patel. "Ethylene inhibitors improve dry matter partitioning and development of late flowering spikelets on rice panicles." Functional Plant Biology 27, no. 4 (2000): 311. http://dx.doi.org/10.1071/pp99057.

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Primary branch development of the rice panicle was in the order of a basipetal sequence from the top to the bottom at the time of anthesis. Delayed development of spikelets on the proximal branches of the panicle resulted in reduced grain filling. Two experiments were carried out to manipulate growth and development of the proximal spikelets with exogenous application of chemicals regulating formation or action of ethylene. In the first experiment, inhibitors of ethylene synthesis (cobalt) and action (silver) improved grain biomass and specific gravity of the basal spikelets, while 2-chloroeth

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Shynkaruk, L. "Efficacy of funcicides in maize growing." Karantin i zahist roslin, no. 1 (April 27, 2022): 17–20. http://dx.doi.org/10.36495/2312-0614.2022.1.17-20.

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Goal. To determine the technical efficiency of fungicidal treatments against helminthosporiosis, rust and fusarium ear rot in the conditions of the western forest-steppe of Ukraine. Methods. Field. The research scheme included 13 variants with different amounts of fungicidal treatments. The following fungicides were used in the experiments: Abacus e.c. (epoxiconazole 62.5 l/ha + pyraclostrobin 62.5 l/ ha), Coronet 300 SC (trifloxystrobin 100 g/l + tebuconazole 200 g /l), Custodia CS (tebuconazole 200 g/l + azoxystrobin 120 g/l), Acanto KS (picoxystrobin — 250 g/l. Records of diseases wer

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Krinski, Diones, and Luís Amilton Foerster. "Quantitative and qualitative damage caused by Oebalus poecilus (Hemiptera, Pentatomidae) to upland rice cultivated in new agricultural frontier of the Amazon rainforest (Brazil)." Ciência e Agrotecnologia 41, no. 3 (2017): 300–311. http://dx.doi.org/10.1590/1413-70542017413036816.

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ABSTRACT Oebalus poecilus (Dallas 1851) is one of the stink bug species of great economic importance for rice producers in Brazil of irrigated, flood and upland cropping systems. These pentatomids are known as stink bugs of panicles, because both nymphs and adults feed mainly on panicles. Stink bug attacks result in pecky (spots) seeds, lower mass, germinative reduction and deformed grains. Bearing these factors in mind, the aim of this study was to evaluate the quantitative and qualitative losses in commercial cultivars of upland rice (Cambará variety), submitted to different population level

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Menzel, CM, ML Carseldine, and DR Simpson. "Crop development and leaf nitrogen in lychee in subtropical Queensland." Australian Journal of Experimental Agriculture 28, no. 6 (1988): 793. http://dx.doi.org/10.1071/ea9880793.

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Heaviest flowering of 6-9-year-old lychee trees (Litchi chinensis cv. Tai So) over 3 seasons in subtropical Queensland (lat. 27�S.) was associated with a growth check in the terminal shoots prior to panicle emergence (May-June). Leaf nitrogen was the main factor controlling the level of flushing before panicle emergence. Flushing was active (on >40% of terminal branches) when leaf nitrogen concentration exceeded 1.85% N in April. These results suggest that flowering of lychee in subtropical environments where heavy rain precedes panicle emergence in autumn can be promoted by restricting lea

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Hasan, MJ, Umma Kulsum, MMH Rahman, MMH Chowdhury, and AZMKA Chowdhury. "Genetic diversity analysis of parental lines for hybrid development in rice (Oryza sativa L.)." Bangladesh Journal of Agricultural Research 37, no. 4 (2013): 617–24. http://dx.doi.org/10.3329/bjar.v37i4.14386.

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Genetic divergence of 40 parental lines comprising 30 restorer and 10 maintainer lines were studied through Mohalanobis's D2 and principal component analysis for eleven characters. Genotypes were grouped into five different clusters. Cluster V comprised maximum number of genotypes (thirteen) followed by cluster I and II. The inter-cluster distance was maximum between clusters I and V (13.495) indicating wide genetic diversity between these two clusters followed by the distance between cluster I and 11 (9.489), cluster IV, and cluster V (8.969) and cluster I and cluster III (8.039). The minimum

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Liu, Jiajun, Xi’an Shi, Zhongyuan Chang, Yanfeng Ding, and Chengqiang Ding. "Auxin Efflux Transporters OsPIN1c and OsPIN1d Function Redundantly in Regulating Rice (Oryza sativa L.) Panicle Development." Plant and Cell Physiology 63, no. 3 (2021): 305–16. http://dx.doi.org/10.1093/pcp/pcab172.

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Abstract The essential role of auxin in plant growth and development is well known. Pathways related to auxin synthesis, transport and signaling have been extensively studied in recent years, and the PIN-FORMED (PIN) protein family has been identified as being pivotal for polar auxin transport and distribution. However, research focused on the functional characterization of PIN proteins in rice is still lacking. In this study, we investigated the expression and function of OsPIN1c and OsPIN1d in the japonica rice variety (Nipponbare) using gene knockout and high-throughput RNA sequencing analy

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Fraser, Joanna, and Eric G. Kokko. "Panicle, spikelet, and floret development in orchardgrass (Dactylis glomerata)." Canadian Journal of Botany 71, no. 4 (1993): 523–32. http://dx.doi.org/10.1139/b93-058.

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The initial stages of panicle, spikelet, and floret development in field-grown 'Kay' orchardgrass were examined using scanning electron microscopy. Spikelets arose from a complex multilevelled sequence of initiation from branch apices. Spikelets developed indirectly in a two-tiered progression: (i) an acropetal and basipetal sequence of first order, second-order, and third-order inflorescence apices, and (ii) an acropetal development within subclusters of higher-order lateral branch inflorescence apices. The panicle had the unique feature of dorsiventrality as well as bilateral symmetry. The b

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Afroz, Nice, Shakil Arvin Zomo, Jesmin Zaman, Md Obayedul Hoque Reza, and Md Omar Kayess. "Optimization of Nitrogen Fertilizer Dose for the Growth and Development of BRRI Dhan47." Asian Journal of Research in Crop Science 9, no. 2 (2024): 128–33. http://dx.doi.org/10.9734/ajrcs/2024/v9i2273.

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An experiment was conducted at the Agronomy Field Laboratory of Bangladesh Agricultural University, Mymensingh during the period to study the effect of nitrogen on the yield of Boro rice cv. BRRI dhan47. The experiment consisted of four levels of nitrogen viz. 0, 80, 100, and 120 kg N ha-1 as treatment. The experiment was laid out in a randomized complete block design with three replications. The level of nitrogen significantly influenced all the parameters except the weight of 1000-grain. The tallest plant (99.18 cm), highest number of total tillers hill1 (13.23), maximum number of non-effec

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Kuzenko, M. V., and V. I. Kuzenko. "Influence of morphological characteristics of stem and panicle length on wintering oat lodging resistance." New Technologies 16, no. 5 (2020): 63–70. http://dx.doi.org/10.47370/2072-0920-2020-16-5-63-70.

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The article presents the results of investigating morphological parameters of a stem and a panicle of wintering oat varieties and hybrid populations of the nursery of competitive variety trial and Avena fatua (L.) field weed species. The research has been carried out in order to identify differences in morphological characteristics of cultivated and weed-field types of oats, as well as to search for economically useful characteristics for practical use in breeding. The research focuses on lodging resistance as one of the significant economically valuable signs of increasing wintering oat produ

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Zhang, Jinshan, Zhenyu Zhou, Jinjuan Bai, et al. "Disruption of MIR396e and MIR396f improves rice yield under nitrogen-deficient conditions." National Science Review 7, no. 1 (2019): 102–12. http://dx.doi.org/10.1093/nsr/nwz142.

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Abstract The microRNA miR396 directly represses GROWTH-REGULATING FACTORs (OsGRFs) and has been implicated in regulating rice yield and in nitrogen assimilation. Overexpressing the miR396 targets OsGRF4 and OsGRF6 improves rice yield via increased grain size and panicle branching, respectively. Here, we used CRISPR/Cas9 to assess the function of miR396 genes in rice. Knockout of MIR396ef (MIR396e and MIR396f), but not other isoforms, enhanced both grain size and panicle branching, resulting in increased grain yield. Importantly, under nitrogen-deficient conditions, mir396ef mutants showed an e

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Fikri, Fata Muslim, Puji Lestari, and Miftahudin. "Pemanfaatan Analisis Komponen Utama dalam Mendeskripsikan Ciri Morfoagronomi Padi yang Berkorelasi dengan Yield." Jurnal Sumberdaya Hayati 10, no. 3 (2024): 136–42. http://dx.doi.org/10.29244/jsdh.10.3.136-142.

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Rice is an important food crop with a crucial role in global food security. Study on correlation between morphoagronomic traits and yield is an important step in the development of superior rice varieties. Research data were collected from 20 rice varieties grown in the experimental field. A total of 10 morphoagronomic trait variables were measured, including plant height, number of productive tillers, flowering age, dry weight of biomass, hollow grain, 1,000-grain weight, grain weight, panicle number, panicle length, and harvest index. Data were analyzed using variance, correlation, and princ

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Panigrahi, Rashmi, Ekamber Kariali, Binay Bhusan Panda, Tanguy Lafarge, and Pravat Kumar Mohapatra. "Controlling the trade-off between spikelet number and grain filling: the hierarchy of starch synthesis in spikelets of rice panicle in relation to hormone dynamics." Functional Plant Biology 46, no. 6 (2019): 507. http://dx.doi.org/10.1071/fp18153.

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The advent of dwarf statured rice varieties enabled a major breakthrough in yield and production, but raising the ceiling of genetically determined yield potential even further has been the breeding priority. Grain filling is asynchronous in the rice panicle; the inferior spikelets particularly on secondary branches of the basal part do not produce grains of a quality suitable for human consumption. Of the various strategies being considered, the control of ethylene production at anthesis has been a valuable route to potentially enhance genetic yield level of rice. The physiology underlying sp

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Panigrahi, Rashmi, Ekamber Kariali, Binay Bhusan Panda, Tanguy Lafarge, and Pravat Kumar Mohapatra. "Corrigendum to: Controlling the trade-off between spikelet number and grain filling: the hierarchy of starch synthesis in spikelets of rice panicle in relation to hormone dynamics." Functional Plant Biology 46, no. 6 (2019): 595. http://dx.doi.org/10.1071/fp18153_co.

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The advent of dwarf statured rice varieties enabled a major breakthrough in yield and production, but raising the ceiling of genetically determined yield potential even further has been the breeding priority. Grain filling is asynchronous in the rice panicle; the inferior spikelets particularly on secondary branches of the basal part do not produce grains of a quality suitable for human consumption. Of the various strategies being considered, the control of ethylene production at anthesis has been a valuable route to potentially enhance genetic yield level of rice. The physiology underlying sp

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KHAN, W. U., S. M. A. SHAH, H. ULLAH, I. H. KHALIL, S. A. JADOON, and D. WANG. "DEVELOPMENT OF RICE GERMPLASM BASED ON GENETIC VARIABILITY IN F5 SEGREGATING POPULATIONS." SABRAO Journal of Breeding and Genetics 54, no. 5 (2022): 993–1003. http://dx.doi.org/10.54910/sabrao2022.54.5.3.

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Water scarcity is a global dilemma, and rice crop needs plenty of water for optimum growth and yield. In the current climate change scenario, developing a broad-based gene pool of rice to help the crop breeders develop high-yielding cultivars needs dire action. This study assessed the genetic variation among 10 diversified parents and their 15 F5 populations developed under limited water supply for various morphological traits. Parents and F5 populations showed significant differences at 5% and 1% for most of the studied maturity and yield traits. F5 population ‘Dokri-Basmati/DR-92’ exhibited

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Dekhane, S. S., R. R. Pisal, P. B. Jadhav, and D. J. Patel. "Assessment of Growth and Yield Performance of Twelve Different Rice Varieties Under North Konkan Coastal Zone of Maharashtra." International Journal of Horticulture, Agriculture and Food science 7, no. 6 (2023): 01–05. http://dx.doi.org/10.22161/ijhaf.7.6.1.

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The present investigation entitled “Assessment of growth and yield performance of twelve different rice varieties under north Konkan coastal zone of Maharashtra” was carried out during the kharif season of the year 2021 and 2022 on the field of ASPEE, Agricultural Research and Development Foundation, Tansa Farm, At Nare, Taluka Wada, District Palghar, Maharashtra, India. The experiment was laid out in Randomized Block Design (RBD). The twelve varieties namely Zini, Jaya, Dandi, Rahghudya, Govindbhog, Dangi, Gurjari, VNR-7, VNR-8, VNR-9, Karjat-3, and Karjat-5 were replicated thrice. The plant

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Carpenter, Judith L., and Herbert J. Hopen. "A Comparison of the Biology of Wild and Cultivated Proso Millet (Panicum miliaceum)." Weed Science 33, no. 6 (1985): 795–99. http://dx.doi.org/10.1017/s0043174500083363.

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Wild and cultivated proso millet (Panicum miliaceumL. ♯ PANMI) showed increased height and dry mass with increasing photoperiod and flowered under all photoperiods. Increasing planting density decreased height and dry mass and slowed seedhead development in both types. Shading increased plant height and decreased dry mass of both millets and increased germination compared to unshaded treatments. Planting date did not affect germination of freshly collected seed of either millet. Wild proso millet seed had a low germination rate until 8 weeks after panicle emergence, and the rate increased to 2

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Alaric, Makoundou, Ongouya Mouekouba Dalcantara Liana, Mbon Nguekou Chrichna, and Attibayeba. "Relationship between the Orientation of Leaves in Space and the Rice Development Process." Biotechnology Journal International 28, no. 4 (2024): 78–82. http://dx.doi.org/10.9734/bji/2024/v28i4729.

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The objective of this study was to evaluate plants of SPU-79-96 forms with a short, dense, non-drooping panicle and SPU78-96 plants with a long, drooping panicle. This characteristic of these forms is the vertical arrangement of the leaves on the stem. Methodology and Results: Four growth components were measured after sowing in the field: the angle of deviation of the leaf from the main stem, leaf area, plant height, and length of the main panicle. The experimental design was a randomized split-plot with three (3) replicates. The lowest values were observed in plants SPU-78-96(10,3 to 11,00),

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Korotenko, Tatyana, Semen Yurchenko, and Lyubov Esaulova. "Plant productivity parameters in rice varieties with different type of panicles and their variability." E3S Web of Conferences 285 (2021): 02031. http://dx.doi.org/10.1051/e3sconf/202128502031.

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To increase rice yield, scientists are considering the possibility of changing the morphological parameters of plants. At the same time, there are not enough attempts in Russia to analyze the yield potential of varieties with different panicle architectonics. The purpose of our research was a comparative analysis of rice varieties differing in panicle morphotype, by the formation of productivity elements. In the ecological conditions of the south of Russia, in 2019-2020, a series of field experiments were carried out with 24 Oryza sativa L. varieties under conditions of artificial irrigation.

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Ali, Asif, Tingkai Wu, Zhengjun Xu, et al. "Phytohormones and Transcriptome Analyses Revealed the Dynamics Involved in Spikelet Abortion and Inflorescence Development in Rice." International Journal of Molecular Sciences 23, no. 14 (2022): 7887. http://dx.doi.org/10.3390/ijms23147887.

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Panicle degeneration, sometimes known as abortion, causes heavy losses in grain yield. However, the mechanism of naturally occurring panicle abortion is still elusive. In a previous study, we characterized a mutant, apical panicle abortion1331 (apa1331), exhibiting abortion in apical spikelets starting from the 6 cm stage of panicle development. In this study, we have quantified the five phytohormones, gibberellins (GA), auxins (IAA), abscisic acid (ABA), cytokinins (CTK), and brassinosteroids (BR), in the lower, middle, and upper parts of apa1331 and compared these with those exhibited in its

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Jalil, MA, IJ Shelley, MHR Pramanik, and MA Karim. "Effect of transplanting times on pollen and spikelet sterility, growth and yield of aman rice." Progressive Agriculture 27, no. 4 (2017): 400–408. http://dx.doi.org/10.3329/pa.v27i4.32119.

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A field experiment was conducted to study the effect of planting dates on pollen/spikelet sterility, grain development and yield of hybrid rice in T. Aman season. The two varieties: Heera-4 (hybrid) and BINAdhan-7 (inbred) were transplanted on five consecutive dates at fifteen days interval viz. 15 July, 30 July, 15 August, 30 August and 15 September of 2011. The effect of variety and transplanting date showed significant variation in pollen sterility, grain growth & development, panicle length, filled grains panicle-1, spikelet sterility and grain yield. Pollen sterility was the highest i

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Rood, Stewart B., Darla M. Bruns, and Susan J. Smienk. "Gibberellins and sorghum development." Canadian Journal of Botany 66, no. 6 (1988): 1101–6. http://dx.doi.org/10.1139/b88-157.

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Sorghum (Sorghum bicolor (L.) Moench) hybrids adapted for grain (cv. Northrup King X8102) or forage production (cv. Pride PF70) were grown in field trials at Lethbridge, Alta., Canada, and shoot cylinders containing the apical meristems were harvested at various developmental stages for analyses of endogenous gibberellin-like (GA-like) substances. Extracts were purified and chromatographed on sequential SiO2 partition columns and C18 reversed-phase high-performance liquid chromatography, and GA-like substances were detected and quantified by the cv. Tan-ginbozu dwarf rice microdroop assay. Con

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Mallik, S., A. M. Aguilar, and B. S. Vergara. "Analysis of rice panicle structure." International Rice Research Newsletter 14, no. 3 (1989): 10–12. https://doi.org/10.5281/zenodo.6880128.

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This article 'Analysis of Rice Panicle Structure' 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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Gutorova, O. V., S. A. Zaitsev, P. A. Matyushin, A. Yu Lyovkina, and D. D. Babushkin. "Evaluation of experimental corn hybrids on the development of morphometric parameters." IOP Conference Series: Earth and Environmental Science 1045, no. 1 (2022): 012012. http://dx.doi.org/10.1088/1755-1315/1045/1/012012.

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Abstract The article presents the results of the study of new hybrid combinations of rediploid maize lines obtained by the diallelic scheme of crossing. The experiment involved simple hybrids of six homozygous lines. The degree of manifestation of heterosis according to the main morphometric parameters of the plant (stem length, ear height, panicle length, stem diameter), as well as the combinative ability of lines and components of genetic dispersion, was revealed. The ways of possible use of lines and hybrids in the breeding process are noted - for tall stature, resistance to lodging, manufa

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Boyle, Roger, Fiona Corke, and Catherine Howarth. "Image-based estimation of oat panicle development using local texture patterns." Functional Plant Biology 42, no. 5 (2015): 433. http://dx.doi.org/10.1071/fp14056.

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Flowering time varies between and within species, profoundly influencing reproductive fitness in wild plants and productivity in crop plants. The time of flowering, therefore, is an important statistic that is regularly collected as part of breeding programs and phenotyping experiments to facilitate comparison of genotypes and treatments. Its automatic detection would be highly desirable. We present significant progress on an approach to this problem in oats (Avena sativa L.), an underdeveloped cereal crop of increasing importance. Making use of the many thousands of images of oat plants we ha

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