Scholarlink

<p>The study, conducted from 2021 to 2023, aimed to assess growth trait variations among walnut progenies from northwestern Himalayan region and identify superior genotypes. Nuts from 60 half-sib genotypes were collected, stratified, and transplanted into a nursery. Significant variations in survival percentage and growth traits were observed at p&#xa0;&lt; 0.05. The GCV ranged from 9.24% (Lll) to 24.36% (Sh), while PCV varied between 9.55% (Lll) and 24.49% (Sh), indicating substantial variability. Broad-sense heritability (<InlineEquation ID="IEq1"> <EquationSource Format="TEX">\({H}_{b}^{2}\)</EquationSource> <EquationSource Format="MATHML"><math> <msubsup> <mi>H</mi> <mrow> <mi>b</mi> </mrow> <mn>2</mn> </msubsup> </math></EquationSource> </InlineEquation>) was high, ranging from 93.69% (Llw) to 98.91% (Sh), suggesting genetic factors as key determinants. Seedling height (Sh) showed a strong positive genotypic and phenotypic correlation (p ≤ 0.01) with Cd, Nl, Pl, Lll, and Lla. Germination percentage exhibited a significant positive genotypic correlation (p ≤ 0.05) with Sh and a phenotypic correlation with Nl and Llw. Principal component analysis revealed that Sh, Cd, Pl, Nl, Llw, Lll, and Lla contributed significantly to phenotypic variation, reducing traits to two principal components (68.70% variation). Cluster analysis classified genotypes into four groups. Genotypes MHL-II, BHL-I, DRB-II, MHL-III, and CRG-I were found superior based on trait means and multivariate analysis of progenies at nursery stage. Further evaluation of these promising genotypes is recommended for walnut breeding.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Genetic variability in growth traits and survival of wild walnut (Juglans regia) nursery seedlings in the Northwestern Himalayan region through multivariate analysis

  • 期刊论文

  • 发表日期：

    2026年2月23日

查看全文
  • Umesh Sharma,
  • Hari Paul Sankhyan,
  • Vishal Singh Rana,
  • Anita Thakur,
  • Shikha Thakur,
  • Neeraj Sankhyan,
  • Sunny Sharma,
  • Shilpa Sharma

摘要

The study, conducted from 2021 to 2023, aimed to assess growth trait variations among walnut progenies from northwestern Himalayan region and identify superior genotypes. Nuts from 60 half-sib genotypes were collected, stratified, and transplanted into a nursery. Significant variations in survival percentage and growth traits were observed at p < 0.05. The GCV ranged from 9.24% (Lll) to 24.36% (Sh), while PCV varied between 9.55% (Lll) and 24.49% (Sh), indicating substantial variability. Broad-sense heritability ( \({H}_{b}^{2}\) H b 2 ) was high, ranging from 93.69% (Llw) to 98.91% (Sh), suggesting genetic factors as key determinants. Seedling height (Sh) showed a strong positive genotypic and phenotypic correlation (p ≤ 0.01) with Cd, Nl, Pl, Lll, and Lla. Germination percentage exhibited a significant positive genotypic correlation (p ≤ 0.05) with Sh and a phenotypic correlation with Nl and Llw. Principal component analysis revealed that Sh, Cd, Pl, Nl, Llw, Lll, and Lla contributed significantly to phenotypic variation, reducing traits to two principal components (68.70% variation). Cluster analysis classified genotypes into four groups. Genotypes MHL-II, BHL-I, DRB-II, MHL-III, and CRG-I were found superior based on trait means and multivariate analysis of progenies at nursery stage. Further evaluation of these promising genotypes is recommended for walnut breeding.