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Genetic Diversity Among Indigenous Germplasm of Brassica juncea (L.) Czern and Coss, Using Agro-Morphological and Phenological Traits

Abstract

One hundred forty eight accessions of Indian mustard collected from 9 different agro-ecological zones covering 17 states of India were evaluated for 15 quantitative traits during the year 2012 and 2013. These accessions showed presence of highest variation for 1000 seed weight (coefficient of variation 48.57 %) while for other traits mean coefficient of variation was recorded between 4.41 % (days to maturity) to 38.55 % (beak length). First five Principal components (PC1 to PC5) gave eigen values >1.0 and cumulatively expressed 59.8 % of the total variation. PCA exhibited that plant height, leaf length, leaf width, silique length, length of main fruiting branch, 1000 seed weight, days to 50 % flowering and maturity were among the most important traits and accounted for more than 50 % phenotypic variation. Correlation studies indicated that plant height, leaf length, leaf width, days to 50 % flowering along with days to maturity should be considered while performing selection in segregating generations intended to improve seed yield/plant. While making selection for enhanced oil content in seed, leaf petiole length should be given due consideration due to highly significant positive correlation with per cent oil content. Donors for various traits were also identified on the basis of their pooled performance e.g. IC 597886 for seed yield/plant (44.6 g) and IC 383489 for oil content (43.2 %).

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Acknowledgments

Authors express sincere thanks to all partners who helped in the exploration and collection of germplasm and special thanks are due to farming communities who conserved these useful genetic resources through continuous cultivation.

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Correspondence to Rashmi Yadav.

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The authors also declare that they have no conflict of interest.

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Yadav, R., Singh, R., Kumar, S. et al. Genetic Diversity Among Indigenous Germplasm of Brassica juncea (L.) Czern and Coss, Using Agro-Morphological and Phenological Traits. Proc. Natl. Acad. Sci., India, Sect. B Biol. Sci. 87, 1125–1131 (2017). https://doi.org/10.1007/s40011-015-0689-4

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Keywords

  • Indian mustard
  • Correlation
  • Diversity
  • Principal component analysis
  • Donors