Morpho-agronomic and simple sequence repeat-based diversity in colored rice (<Emphasis Type="Italic">Oryza sativa</Emphasis> L.) germplasm from peninsular India |
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Authors: | S?J?M?Gowda G?J?Randhawa I?S?Bisht P?K?Firke A?K?Singh Z?Abraham Email author" target="_blank">B?S?DhillonEmail author |
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Institution: | (1) National Bureau of Plant Genetic Resources, New Delhi, India;(2) Indian Agricultural Research Institute, New Delhi, India;(3) National Bureau of Plant Genetic Resources Regional Station, Thrissur, India;(4) Institute of Plant Breeding, Seed Science and Population Genetics, University of Hohenheim, 70593 Stuttgart, Germany; |
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Abstract: | Knowledge of the genetic diversity in the germplasm accessions is important for the efficient germplasm management. We studied
45 colored rice accessions, which had been earlier collected from peninsular India. The accessions were evaluated at two diverse
locations for 12 morpho-agronomic traits and genotyped using 50 simple sequence repeat (SSR) markers. Significant genotypic
variability was observed for all morpho-agronomic traits studied. Dendrogram and principal component analysis based on morpho-agronomic
traits separated the accessions into three clusters. The first two principal components accounted for 82% of the total variation.
The most discriminatory traits were number of grains per panicle, biomass yield, and days to flowering and maturity. The SSR
analysis revealed high polymorphic information content value of 0.84. Though, Mantel test did not show a significant correlation,
yet the classification based on phenotyping and genotyping data showed good agreement for the expression of morpho-agronomic
traits in the formation of clusters. Five accessions had high concentration (> 100 μg/g) of Fe and one of Zn. Our study revealed
the presence of large genetic variation among the colored rice accessions evaluated and moderate agreement between morpho-agronomic
and SSR–based classifications and of these with geographic diversity. |
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