M. R. Bhavya, M. Y. Jagadamba, G. S. Arunakumar, B. V. Sushmita, B. N. Gnanesh, P. Sowbhagya, N. R. Nisarga, T. Sarkar, C. M. Babu, S. G. Doss
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The hundred leaf weight (HLW), leaf area (LA) and number of leaves on the longest shoot (NLS) presented high phenotypic coefficients of variance (39.48, 32.9 and 22.13, respectively), high genotypic coefficients of variance (31.79, 28.11 and 20.78, respectively), high heritability (64.84, 73.00 and 88.22, respectively) and genetic advance (52.82, 49.54 and 40.27, respectively) and significant correlations (r = 0.51***, r = 0.42***, r = 0.39***, respectively), with leaf yield, indicating the potential of these traits for indirect selection for high leaf yielding genotypes in mulberry. Hierarchical cluster analysis grouped the 203 mulberry genotypes into seven clusters, which revealed significant genetic diversity among the genotypes. PCA revealed that the first two components accounted for 78.73% of the total variation. PC1 was primarily associated with leaf yield (−0.40), whereas traits such as HLW (0.54), LA (0.51), and NLS (−0.48) contributed strongly to PC2. Seven genotypes (ME-0005, ME-0246, ME-0169, MI-0523, Vishala, MI-0029, and MI-0580) presented relatively high PC1 and PC2 scores, which were associated with increased leaf yield, HLW, LA, and NLS. The results of this study are valuable in identifying the best traits and diverse and high-yield parental genotypes for use in hybridization programs.</p></div>","PeriodicalId":805,"journal":{"name":"Trees","volume":"39 5","pages":""},"PeriodicalIF":2.1000,"publicationDate":"2025-09-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Genetic variability, association and diversity analysis of yield and yield-associated traits in mulberry (Morus spp.) genotypes\",\"authors\":\"M. R. Bhavya, M. Y. Jagadamba, G. S. Arunakumar, B. V. Sushmita, B. N. Gnanesh, P. Sowbhagya, N. R. Nisarga, T. Sarkar, C. M. Babu, S. G. 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引用次数: 0
摘要
本研究确定了与叶片产量密切相关的高遗传变异性和遗传力性状，并确定了适合作为亲本的高产基因型。摘要桑树是蚕业的重要作物，是家蚕（Bombyx mori L.）的唯一食物来源。本研究对203个桑树基因型的产量及产量相关性状进行了连续两年的评价，以确定最佳性状和高产基因型。方差分析（ANOVA）显示6个性状在各品种间差异显著（p < 0.05）。百叶重（HLW）、叶面积（LA）和最长梢叶数（NLS）与叶片产量的表型变异系数分别为39.48、32.9和22.13，基因型变异系数分别为31.79、28.11和20.78，遗传力分别为64.84、73.00和88.22，遗传先进度分别为52.82、49.54和40.27，相关系数分别为0.51、0.42和0.39。说明这些性状在桑树高产基因型间接选择中的潜力。分层聚类分析将203个桑树基因型分为7个聚类，表明基因型间存在显著的遗传多样性。主成分分析表明，前两个分量占总变异量的78.73%。PC1主要与叶片产量相关（- 0.40），而高高（0.54）、LA（0.51）和NLS（- 0.48）等性状对PC2贡献较大。7个基因型（ME-0005、ME-0246、ME-0169、MI-0523、Vishala、MI-0029和MI-0580）的PC1和PC2得分较高，与叶片产量、高净重、LA和NLS相关。本研究结果对于鉴定最佳性状和多样化高产亲本基因型，用于杂交计划具有重要价值。
Genetic variability, association and diversity analysis of yield and yield-associated traits in mulberry (Morus spp.) genotypes
Key message
This study identified traits with high genetic variability and heritability that are strongly correlated with leaf yield and identified high-yielding genotypes suitable for use as parents in breeding programs.
Abstract
Mulberry is a crucial crop for the sericulture industry, as it is the exclusive food source for the silkworm (Bombyx mori L.). This study evaluated the yield- and yield-associated traits of 203 mulberry genotypes for two consecutive years to identify the best traits and high-yield genotypes. The analysis of variance (ANOVA) revealed significant differences (p < 0.05) among the accessions for the six studied traits. The hundred leaf weight (HLW), leaf area (LA) and number of leaves on the longest shoot (NLS) presented high phenotypic coefficients of variance (39.48, 32.9 and 22.13, respectively), high genotypic coefficients of variance (31.79, 28.11 and 20.78, respectively), high heritability (64.84, 73.00 and 88.22, respectively) and genetic advance (52.82, 49.54 and 40.27, respectively) and significant correlations (r = 0.51***, r = 0.42***, r = 0.39***, respectively), with leaf yield, indicating the potential of these traits for indirect selection for high leaf yielding genotypes in mulberry. Hierarchical cluster analysis grouped the 203 mulberry genotypes into seven clusters, which revealed significant genetic diversity among the genotypes. PCA revealed that the first two components accounted for 78.73% of the total variation. PC1 was primarily associated with leaf yield (−0.40), whereas traits such as HLW (0.54), LA (0.51), and NLS (−0.48) contributed strongly to PC2. Seven genotypes (ME-0005, ME-0246, ME-0169, MI-0523, Vishala, MI-0029, and MI-0580) presented relatively high PC1 and PC2 scores, which were associated with increased leaf yield, HLW, LA, and NLS. The results of this study are valuable in identifying the best traits and diverse and high-yield parental genotypes for use in hybridization programs.
期刊介绍：
Trees - Structure and Function publishes original articles on the physiology, biochemistry, functional anatomy, structure and ecology of trees and other woody plants. Also presented are articles concerned with pathology and technological problems, when they contribute to the basic understanding of structure and function of trees. In addition to original articles and short communications, the journal publishes reviews on selected topics concerning the structure and function of trees.
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