Phenotypic and genotypic diversity in pearl millet [Pennisetum glaucum (L.) R. Br.] germplasm lines
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Date
2015
Authors
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Journal ISSN
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Publisher
CCSHAU
Abstract
Phenotypic and genotypic diversity in pearl millet [Pennisetum glaucum (L.) R. Br.] was
studied in a set of 48 maintainer lines using 30 morpho-agronomic traits (16 qualitative and 14
quantitative) and 22 SSR markers. Significant mean sum of squares indicated sufficient variation in the
lines. Leaf sheath length, number of productive tillers/plant, plant height, 1000 grain weight, grain
yield/plant had high GCV, PCV, heritability and genetic advance as % of mean. Correlation coefficient
analysis revealed that days to 50% flowering, spike length, number of productive tillers per plant, 1000
grain weight, dry and green fodder yield were significantly and positively correlated with grain yield
per plant. Path coefficient analysis revealed that days to 50% flowering, spike length, number of
productive tillers/plant had high significant direct contribution towards grain yield/plant. First five
principal components explained 81.02% of accumulated variability. D
2
analysis led to formation of
seven clusters. The highest inter-cluster distance was found between clusters 1 and 7. Based on
Principal Component and factor analysis, genotypes HMS 43B, HMS 45B, HMS 60B, ICMB 97111,
Tift 23 D
2B etc. showed high grain yield and high number of productive tillers/plant and plant height.
Genotyping of maintainer lines with 22 polymorphic SSR markers lead to formation of 8 groups. Three
out of 22 polymorphic primers showed PIC value of more than 0.70. Phenotypic and genotypic
clustering showed that some genotypes grouped together in the two data sets.
Description
Keywords
Yields, developmental stages, Millets, Planting, Grain, Genotypes, Genetics, Productivity, Biological phenomena, Diseases