GENETIC DIVERSITY AND MULTIVARIATE ANALYSIS OF YIELD PERFORMANCE TRAITS IN POTATO
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Authors
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Salej Sood
ICAR-CPRI Shimla
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Vikas Mangal
https://orcid.org/0000-0001-9418-2340
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Vinay Bhardwaj
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Bhawna Dipta
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Mehi Lal
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Kritika Singh
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R.K. Singh
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Vinod Kumar
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Brajesh Singh
Keywords:
Genetic diversity, marketable tuber yield, specific gravity, principal component analysis, hierarchical clusteringAbstract
The present study investigated the genetic diversity and yield performance traits in 332 potato accessions evaluated in 2020 and 366 accessions in 2021 at ICAR-Central Potato Research Institute, Regional Station, Modipuram. An augmented design, was used to assess the marketable tuber yield (MTY), non-marketable tuber yield (NMTY), total tuber yield (TTY), specific gravity (SG), and plant maturity (PM). Significant genetic variation was observed, with heritability values exceeding 90% for key traits like TTY and MTY. Principal component analysis (PCA) identified marketable and total tuber yield as primary contributors to variability, which explained 63.2% of the total variance. The formation of four distinct clusters (red, blue, green, and black) in the present investigation highlights the presence of subgroups with shared traits. Hierarchical clustering highlighted the potential of combining the yield related traits of Tuberosum accessions, the genetic diversity of Andigena accessions (Solanum tuberosum Andigena group), and the regional adaptability of Indian varieties to develop superior potato cultivars with improved yield. Key accessions, including JEX/A-459 and Kufri Pushkar, exhibited superior yield performance, which can be a promising candidate for breeding programs.
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