Indian Wild Rice: Diversity, Population Structure, Trait Value and Relation with Cultivated Rice

Singh, Nagendra; Singh, Balwant; Mishra, Sanjay; Singh, Nisha; Panda, Kabita; Rai, Vandna

doi:10.5958/0976-1926.2016.00072.3

Cited by 3 publications

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“…Hilario et al (2013b) studied the genetic differentiation of O. nivara and O. ru pogon and found 10% variation among populations and found high level of genetic differentiation between non-sympatric populations. In our study, the gene diversity revealed by expected heterozygosity (He=0.87) was higher than observed in O. nivara and O. ru pogon accessions (He=0.524) from Uttar Pradesh and Bihar(Singh et al 2016) and O. longistaminata accessions (He=0.420) from Ethiopia (Melaku et al 2019). However, Banaticla-Hilario et al (2013b) reported that O. nivara (He = 0.67) exhibits slightly lower diversity and greater population differentiation than O. ru pogon (He = 0.70).…”

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confidence: 52%

Population structure and genetic differentiation analyses reveal high level of diversity and allelic richness in crop wild relatives of AA genome species of rice (Oryza sativa L.) in India

Mahendran,

Yadav,

Tiwari

et al. 2023

J Appl Genetics

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With a view to explore genetic diversity in crop wild relatives of AA-genome species of rice (Oryza sativa L.) in India, we analyzed 96 accessions of 10 Oryza species for 17 quantitative traits with 45 microsatellite markers. The morpho-quantitative traits revealed high extent of phenotypic variation within and between species. Shannon-Weiner's diversity index (H′) also con rmed the presence of high level of genetic variation for both within species, in O. nivara (H′=1.09) and O. ru pogon (H′=1.12), and between species (H′=1.31). Principal component (PC) analysis explained 79.22% variance with ve PCs. Among the traits related to phenology, morphology and yield, days to heading showed strong positive association with days to 50% owering (r = 0.99). However, lled grains per panicle revealed positive association with spikelet fertility (0.71) but negative with awn length (-0.58) and panicle bearing tillers (-0.39). Cluster analysis grouped all the accessions into three major clusters. Microsatellite analysis revealed 676 alleles with mean of 15.02 alleles per locus and 0.83 mean polymorphism information content. UPGMA dendrogram separated wild rice accessions at 0.10 similarity value and delineated 96 accessions into four major clusters. Structure analysis revealed four subpopulations; rst and second subpopulations comprised only of O. nivara accessions, while third subpopulation included both O. nivara and O. ru pogon accessions. Molecular variance among the populations was 11.0%, whereas it was 70.0% among genotypes and 19.0% within genotypes. The high level of molecular and morphological variability detected in the germplasm of crop wild relatives could be utilized for genetic improvement of cultivated rice.

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confidence: 52%

Population structure and genetic differentiation analyses reveal high level of diversity and allelic richness in crop wild relatives of AA genome species of rice (Oryza sativa L.) in India

Mahendran,

Yadav,

Tiwari

et al. 2023

J Appl Genetics

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show abstract

Population Structure and Genetic Differentiation Analyses Reveal High Level of Diversity and Allelic Richness in Crop Wild Relatives of AA-Genome Species of Rice (Oryza sativa L.) in India

Mahendran

Yadav

Tiwari

et al. 2023

Preprint

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With a view to explore genetic diversity in crop wild relatives of AA-genome species of rice (Oryza sativa L.) in India, we analyzed 96 accessions of 10 Oryza species for 17 quantitative traits with 45 microsatellite markers. The morpho-quantitative traits revealed high extent of phenotypic variation within and between species. Shannon-Weiner's diversity index (H′) also confirmed the presence of high level of genetic variation for both within species, in O. nivara (H′=1.09) and O. rufipogon (H′=1.12), and between species (H′=1.31). Principal component (PC) analysis explained 79.22% variance with five PCs. Among the traits related to phenology, morphology and yield, days to heading showed strong positive association with days to 50% flowering (r = 0.99). However, filled grains per panicle revealed positive association with spikelet fertility (0.71) but negative with awn length (-0.58) and panicle bearing tillers (-0.39). Cluster analysis grouped all the accessions into three major clusters. Microsatellite analysis revealed 676 alleles with mean of 15.02 alleles per locus and 0.83 mean polymorphism information content. UPGMA dendrogram separated wild rice accessions at 0.10 similarity value and delineated 96 accessions into four major clusters. Structure analysis revealed four subpopulations; first and second subpopulations comprised only of O. nivara accessions, while third subpopulation included both O. nivara and O. rufipogon accessions. Molecular variance among the populations was 11.0%, whereas it was 70.0% among genotypes and 19.0% within genotypes. The high level of molecular and morphological variability detected in the germplasm of crop wild relatives could be utilized for genetic improvement of cultivated rice.

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Exploring novel QTLs among backcross lines for salinity tolerance in rice

Kumari

Singh

et al. 2022

Indian J Agri Sci

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Wild progenitor species of rice (Oryza rufipogon Griff./ Oryza nivara Sharma et. Shastry) are rich source of genes for both the biotic as well as abiotic stress tolerance. Wild rice accession NKSWR 173 has been identified as highly tolerant to salinity stress at seedling stage and moderately tolerant at reproductive stage after evaluation of more than two hundred wild rice accessions from across India. In a bid to introgress the salt tolerance trait from NKSWR 173 to a high-yielding mega variety of rice IR 64, we screened a segregating BC1 population for identification of suitable lines for making the second backcross using both controlled phenotyping and QTL flanking DNA markers. Four lines, namely SN 32, SN 33, SN 39 and SN 45 were found highly tolerant to salinity at both seedling and reproductive stage and were backcrossed to IR 64 to generate BC2F1 seeds for development of advance introgressed lines. Introgression of novel salinity tolerance genes for both the seedling and reproductive stages in mega variety of rice will be useful in achieving high productivity in salt affected rice areas.

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Indian Wild Rice: Diversity, Population Structure, Trait Value and Relation with Cultivated Rice

Cited by 3 publications

References 0 publications

Population structure and genetic differentiation analyses reveal high level of diversity and allelic richness in crop wild relatives of AA genome species of rice (Oryza sativa L.) in India

Population structure and genetic differentiation analyses reveal high level of diversity and allelic richness in crop wild relatives of AA genome species of rice (Oryza sativa L.) in India

Population Structure and Genetic Differentiation Analyses Reveal High Level of Diversity and Allelic Richness in Crop Wild Relatives of AA-Genome Species of Rice (Oryza sativa L.) in India

Exploring novel QTLs among backcross lines for salinity tolerance in rice

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