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Genetic diversity and stability analysis of sweet potato accessions of north-eastern India grown under the mid-hill conditions of Meghalaya

Published online by Cambridge University Press:  21 December 2023

Veerendra Kumar Verma Open the ORCID record for Veerendra Kumar Verma [Opens in a new window] ,
Amit Kumar ,
Heiplanmi Rymbai Open the ORCID record for Heiplanmi Rymbai [Opens in a new window] ,
Hammylliende Talang ,
M. Bilashini Devi ,
Pankaj Baiswar  and
S. Hazarika
Veerendra Kumar Verma*
Affiliation:
ICAR Research Complex for NEH Region, Umiam-793103, Meghalaya, India
Amit Kumar
Affiliation:
ICAR Research Complex for NEH Region, Umiam-793103, Meghalaya, India
Heiplanmi Rymbai
Affiliation:
ICAR Research Complex for NEH Region, Umiam-793103, Meghalaya, India
Hammylliende Talang
Affiliation:
ICAR Research Complex for NEH Region, Umiam-793103, Meghalaya, India
M. Bilashini Devi
Affiliation:
ICAR Research Complex for NEH Region, Umiam-793103, Meghalaya, India
Pankaj Baiswar
Affiliation:
ICAR Research Complex for NEH Region, Umiam-793103, Meghalaya, India
S. Hazarika
Affiliation:
ICAR Research Complex for NEH Region, Umiam-793103, Meghalaya, India
*
Corresponding author: Veerendra Kumar Verma; Email: verma.veerendra@gmail.com
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Abstract

A total of 32 sweet potato genotypes were evaluated to assess the genetic diversity based on quantitative traits and molecular markers, as well as stability for yield and related traits. Wider variability was observed for the traits like vine length (181.2–501.3 cm), number of leaves/plant (103.0–414.0 cm), internodal length (3.20–14.80 cm), petiole length (6.5–21.3 cm), leaf length (8.50–14.5 cm), leaf breadth (8.20–15.30 cm), leaf area (42.50–115.62 cm2), tuber length (7.77–18.07 cm), tuber diameter (2.67–6.90 cm), tuber weight (65.60–192.09 g), tuber yield (7.77–28.87 t ha−1), dry matter (27.34–36.41%), total sugar (4.50–5.70%) and starch (18.50–29.92%) content. Desirable traits such as tuber yield, dry matter and starch content have shown high heritability (>60%) with moderate to high genetic advance. Under molecular analysis, a total of 232 alleles were observed from all 32 microsatellite markers, which ranged from 4 to 14 with an average of 7.77 alleles per locus. In the population, the average observed heterozygosity (0.51) was higher than the expected heterozygosity (0.49). The contribution of genotype, genotype by environment interaction to the total variations was found to be significant. Based on the multi-trait stability index (tuber length, tuber diameter, tuber weight and tuber yield), genotypes X-24, MLSPC-3, MLSPC-5, ARSPC-1 and TSP-12-12 were found to be most stable. Among them, the high-yielding and stable genotypes TSP-12-10 (26.0 t ha−1) and MLSPC-3 (23.9 t ha−1) can be promoted for commercial production or used as parental material in future crop improvement programmes.

Keywords

genetic diversityheterozygosity and selectionstabilitysweet potatoyield
Type
Research Article
Information
Plant Genetic Resources , Volume 21 , Issue 6 , December 2023 , pp. 537 - 547
Copyright
Copyright © The Author(s), 2023. Published by Cambridge University Press on behalf of National Institute of Agricultural Botany

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