Genetic diversity and population structure analysis of bold type rice collection from Southern India

Nithya, N.; Beena, R.; Abida, P. S.; Sreekumar, J.; Stephen, Roy; Jayalekshmi, V. G.; Manju, R; Viji, M.

doi:10.1007/s42976-020-00099-w

Cited by 12 publications

(6 citation statements)

References 20 publications

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“…Spikelet fertility percentage, days to 50% flowering, plant height and 1000 grain weight had positive direct effect on grain yield. Similar kind of association was also revealed by Nithya et al (2020) [20] . In present experiment, the character total spikelet per panicle observed highest direct positive effect on grain yield per plant and followed by spikelet fertility percent, test weight, productive tillers per plant and panicle length.…”

Section: Resultssupporting

confidence: 86%

Genetic variability, heritability, and correlation analysis of rice (Oryza sativa) for iron and zinc content: Implications for biofortification and yield improvement

Kashinath,

Teja,

Bhor

2024

Int. J. Adv. Biochem. Res.

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Rice (Oryza sativa L.) is a vital cereal crop, serving as the staple food for over half of the global population, particularly in Asia. However, widespread malnutrition persists, primarily due to the consumption of milled rice lacking in essential micronutrients such as iron and zinc. This study aimed to assess the genetic variability of 41 rice genotypes for 11 key traits, focusing on grain yield and nutritional content, particularly iron and zinc. Conducted during the kharif season of 2022 at the Agricultural Research Station, Vadgaon (Maval), Pune, the investigation evaluated variability, heritability, character associations, and path analysis. Results revealed significant variability among genotypes for all studied traits. Both genotypic and phenotypic coefficient of variation were notably high for grain yield per plant, grain iron content, grain zinc content, fertile spikelet's per panicle, and total spikelet's per panicle. Path analysis highlighted direct positive effects of total spikelet's per panicle on grain yield per plant, indicating its importance in yield improvement. Additionally, days to 50% flowering exhibited positive correlations with grain yield per plant, mediated by indirect positive effects through test weight. Conversely, plant height demonstrated a negative direct correlation with grain yield per plant but had positive indirect effects through productive tillers per plant and grain yield per plant. Productive tillers per plant showed significant positive correlations with grain yield via indirect effects through various traits, underlining its role in enhancing yield.

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Section: Resultssupporting

confidence: 86%

Genetic variability, heritability, and correlation analysis of rice (Oryza sativa) for iron and zinc content: Implications for biofortification and yield improvement

Kashinath,

Teja,

Bhor

2024

Int. J. Adv. Biochem. Res.

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“…The imposition of drought stress at the onset of anthesis for 30 days reduced the grain yield and harvest index of 25 rice genotypes, with reduced pollen fertility and test weight of grains for most genotypes, compared to irrigated conditions ( Ahmad et al., 2022 ). While leaf rolling is considered a defense mechanism against drought stress, its promptness correlated with anatomical traits rather than water deficit ( Nithya et al., 2021 . While more leaf rolling occurred in genotypes such as Dangar, water deficit did not affect transpiration ( Cal et al., 2019 ).…”

Section: Physiological and Molecular Implications Of Individual Stres...mentioning

confidence: 99%

Physiological and molecular implications of multiple abiotic stresses on yield and quality of rice

et al. 2023

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Abiotic stresses adversely affect rice yield and productivity, especially under the changing climatic scenario. Exposure to multiple abiotic stresses acting together aggravates these effects. The projected increase in global temperatures, rainfall variability, and salinity will increase the frequency and intensity of multiple abiotic stresses. These abiotic stresses affect paddy physiology and deteriorate grain quality, especially milling quality and cooking characteristics. Understanding the molecular and physiological mechanisms behind grain quality reduction under multiple abiotic stresses is needed to breed cultivars that can tolerate multiple abiotic stresses. This review summarizes the combined effect of various stresses on rice physiology, focusing on grain quality parameters and yield traits, and discusses strategies for improving grain quality parameters using high-throughput phenotyping with omics approaches.

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“…This helps landraces adapt to a wide range of agro-ecological settings, and they also offer unrivalled quality features, medicinal capabilities better environmental adaptations and are an irreplaceable source of highly co-adapted genotypes (Borba et al 2009; Kumbhar et al 2015). The amount genetic diversity present in the population determines the pace and magnitude of the genetic improvement i.e., genetic diversity is necessary to study the genetic structure of a population and to orientate effective strategies of germplasm conservation (Borba et al 2010;Nithya et al, 2021;Amrutha et al, 2022). Usually, the genetic diversity in plants has been determined by physiological and morphological traits.…”

Section: Introductionmentioning

confidence: 99%

Population Structure Analysis and Marker Trait Association in Traditional Rice (Oryza sativa L.) Landraces of Kerala under High Temperature Condition

R.,

et al. 2023

Preprint

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Rice productivity is significantly impacted by a significant abiotic stress called heat stress. To adapt to current or future heat stress, it is necessary to understand the physiological basis of heat tolerance. Thus, the purpose of this study was to assess the physiological, morphological, and yield parameters of fifty traditional rice landraces when subjected to high temperature stress, as well as to identify SSR (Simple Sequence Repeat) markers associated with these traits. The experiment was designed in a completely randomised manner, with two treatment levels, control and high temperature stress (36 ± 2oC), each with three replications. Thirty SSR primers were used to analyze genetic diversity and population structure among 50 traditional rice landraces collected from Regional Agricultural Research Station, Pattambi, Kerala. The fifty traditional rice landraces were clustered using the average linkage method to determine their relationship to one another. The accessions were all grouped primarily into three clusters. According to principal component analysis, under high temperature conditions, the first principal component accounted for 24.602 percent of the variation, while the second component accounted for 20.587 percent of the variation. The accessions were clearly divided into three subpopulations based on population structure analysis. Under high temperature and control conditions, GLM (Generalized Linear Model) analysis revealed highly significant marker trait associations.RM5715, RM10793, and RM471 were among those that showed associations with multiple traits. Molecular markers and identified tolerant accessions can be used in breeding programmes to create high-yielding, temperature-tolerant rice landraces.

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Genetic diversity and population structure analysis of bold type rice collection from Southern India

Cited by 12 publications

References 20 publications

Genetic variability, heritability, and correlation analysis of rice (Oryza sativa) for iron and zinc content: Implications for biofortification and yield improvement

Genetic variability, heritability, and correlation analysis of rice (Oryza sativa) for iron and zinc content: Implications for biofortification and yield improvement

Physiological and molecular implications of multiple abiotic stresses on yield and quality of rice

Population Structure Analysis and Marker Trait Association in Traditional Rice (Oryza sativa L.) Landraces of Kerala under High Temperature Condition

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