Scholarlink

<p>Kodo millet (<i>Paspalum scrobiculatum</i> L.) is a nutrient-rich and climate-resilient crop. Its productivity is often constrained by strong genotype × environment (G × E) interactions and lodging susceptibility, necessitating the need for identifying stable performing cultivars for yield and non-lodging traits. In this study, 36 mutants along with the CO 3, from which mutants were generated, and four checks (ATL 1, ATL 2, ATL 4, and TNAU 86) were evaluated across environments for photosynthetic efficiency, culm strength, and single plant yield using AMMI, GGE, MGIDI, and MTSI models. The joint ANOVA revealed significant G × E effects for all traits. For photosynthetic efficiency, AMMI and GGE biplots identified <i>TNPSc</i> 2138 and <i>TNPSc</i> 2163 as highly stable with superior mean performance. In the case of culm strength, mutants <i>TNPSc</i> 2138, <i>TNPSc</i> 2163, and <i>TNPSc</i> 2132 exhibited high stability and strong lodging tolerance across environments. For single plant yield, AMMI, and GGE analyses consistently confirmed <i>TNPSc</i> 2138 and <i>TNPSc</i> 2163 as the most stable and high-yielding genotypes, combining superior mean performance with minimal interaction effects. The MGIDI index, integrating multiple traits at 15% selection intensity, further identified <i>TNPSc</i> 2163 and <i>TNPSc</i> 2138 as the closest to the ideotype, reflecting balanced performance across agronomic and physiological traits. Correlation analysis indicated that single plant yield was positively influenced by the number of tillers, culm curvature, and culm strength, but negatively associated with plant height. The MTSI index further emphasized the stability of <i>TNPSc</i> 2163, <i>TNPSc</i> 2149, <i>TNPSc</i> 2157, and <i>TNPSc</i> 2138, alongside CO 3 and TNAU 86, which exhibited the lowest MTSI scores. Overall, the consistent superiority of <i>TNPSc</i> 2138 and <i>TNPSc</i> 2163 across all analyses highlighted their broad adaptability with robust culm strength, enhanced chlorophyll index, and high yield potential, establishing them as promising candidates for large-scale cultivation and future genetic improvement programs in kodo millet. This article aligns with SDG 2 (Zero Hunger) of the UN Agenda for Sustainable Development.</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

Multi-trait genotypic stability and performance assessment in kodo millet (Paspalum scrobiculatum) mutants employing AMMI, MGIDI and MTSI indices

  • 期刊论文

  • 发表日期：

    2026年6月2日

查看全文
  • Gowthami Sanku,
  • Ravikesavan Rajasekaran,
  • Narayanan Manikanda Boopathi,
  • Mani Vetriventhan,
  • Iyanar Krishnamoorthy,
  • Vichangal Pridiuldi Santhanakrishnan

摘要

Kodo millet (Paspalum scrobiculatum L.) is a nutrient-rich and climate-resilient crop. Its productivity is often constrained by strong genotype × environment (G × E) interactions and lodging susceptibility, necessitating the need for identifying stable performing cultivars for yield and non-lodging traits. In this study, 36 mutants along with the CO 3, from which mutants were generated, and four checks (ATL 1, ATL 2, ATL 4, and TNAU 86) were evaluated across environments for photosynthetic efficiency, culm strength, and single plant yield using AMMI, GGE, MGIDI, and MTSI models. The joint ANOVA revealed significant G × E effects for all traits. For photosynthetic efficiency, AMMI and GGE biplots identified TNPSc 2138 and TNPSc 2163 as highly stable with superior mean performance. In the case of culm strength, mutants TNPSc 2138, TNPSc 2163, and TNPSc 2132 exhibited high stability and strong lodging tolerance across environments. For single plant yield, AMMI, and GGE analyses consistently confirmed TNPSc 2138 and TNPSc 2163 as the most stable and high-yielding genotypes, combining superior mean performance with minimal interaction effects. The MGIDI index, integrating multiple traits at 15% selection intensity, further identified TNPSc 2163 and TNPSc 2138 as the closest to the ideotype, reflecting balanced performance across agronomic and physiological traits. Correlation analysis indicated that single plant yield was positively influenced by the number of tillers, culm curvature, and culm strength, but negatively associated with plant height. The MTSI index further emphasized the stability of TNPSc 2163, TNPSc 2149, TNPSc 2157, and TNPSc 2138, alongside CO 3 and TNAU 86, which exhibited the lowest MTSI scores. Overall, the consistent superiority of TNPSc 2138 and TNPSc 2163 across all analyses highlighted their broad adaptability with robust culm strength, enhanced chlorophyll index, and high yield potential, establishing them as promising candidates for large-scale cultivation and future genetic improvement programs in kodo millet. This article aligns with SDG 2 (Zero Hunger) of the UN Agenda for Sustainable Development.