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<p>Sweet potato is the most important tuber crop in tropical and sub-tropical parts of the world. However, its cultivation faces challenges due to drought stress. Hence identifying stable drought-tolerant varieties becomes imperative. This study aimed to assess the genotype × environment (G × E) interaction and simultaneous selection of sweet potato genotypes under drought conditions. Includes comprehensive methodologies, including parametric and non-parametric stability models, additive main effects and multiplicative interaction (AMMI), weighted average absolute scores (WAAS), best linear unbiased predictor (BLUP), genotype main effect plus genotype-by-environment interaction (GGE) biplots and multi-trait stability index (MTSI). The significant differences in G × E interaction for tuber yield were revealed through pooled analysis of variance (ANOVA). The parametric and non-parametric stability parameters identified SP3 and SP11 as the most stable genotypes. SP3 and SP20 demonstrated stability according to AMMI-based stability models. The SP17 and SP15 recorded low simultaneous selection index (SSI) and were regarded as high-yielding and stable genotypes. The rank correlation analysis identifies that the stability models superiority index (Pi), geometric adaptability index (Gai), Annichiarrico's genotypic confidence index (Wi) and relative sum of squares of rank for each genotype (S6) are highly significant and positive correlation with tuber yield. The AMMI1 and AMMI2 biplot identified SP11 and SP5 as the stable genotypes. SP3 and SP12 are stable genotypes according to the WAAS biplot. The which-won-where/what model highlighted SP7 as the winner under drought condition. The genotypes SP2, SP21, SP11 and SP3 were selected based on low MTSI values. Overall, SP3, SP11 are selected as per MTSI. SP21, SP15 and SP7 showed high yield potential and stability as per SSI for Pi, Gai, Wi and S6 stability models. These findings offer valuable for developing stable drought-tolerant varieties and enhancing sweet potato resilience in varying environmental conditions.</p>

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Genotype × Environment Interaction Analysis and Simultaneous Selection Using AMMI, BLUP, GGE Biplot and MTSI Under Drought Condition in Sweet Potato

  • 期刊论文

  • 发表日期：

    2025年3月10日

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  • K. H. Gowda,
  • V. B. S. Chauhan,
  • M. Nedunchezhiyan,
  • C. Pradeepika,
  • K. M. Senthilkumar,
  • V. Chandra,
  • G. Byju,
  • M. R. Sahoo,
  • K. Pati,
  • R. Arutselvan

摘要

Sweet potato is the most important tuber crop in tropical and sub-tropical parts of the world. However, its cultivation faces challenges due to drought stress. Hence identifying stable drought-tolerant varieties becomes imperative. This study aimed to assess the genotype × environment (G × E) interaction and simultaneous selection of sweet potato genotypes under drought conditions. Includes comprehensive methodologies, including parametric and non-parametric stability models, additive main effects and multiplicative interaction (AMMI), weighted average absolute scores (WAAS), best linear unbiased predictor (BLUP), genotype main effect plus genotype-by-environment interaction (GGE) biplots and multi-trait stability index (MTSI). The significant differences in G × E interaction for tuber yield were revealed through pooled analysis of variance (ANOVA). The parametric and non-parametric stability parameters identified SP3 and SP11 as the most stable genotypes. SP3 and SP20 demonstrated stability according to AMMI-based stability models. The SP17 and SP15 recorded low simultaneous selection index (SSI) and were regarded as high-yielding and stable genotypes. The rank correlation analysis identifies that the stability models superiority index (Pi), geometric adaptability index (Gai), Annichiarrico's genotypic confidence index (Wi) and relative sum of squares of rank for each genotype (S6) are highly significant and positive correlation with tuber yield. The AMMI1 and AMMI2 biplot identified SP11 and SP5 as the stable genotypes. SP3 and SP12 are stable genotypes according to the WAAS biplot. The which-won-where/what model highlighted SP7 as the winner under drought condition. The genotypes SP2, SP21, SP11 and SP3 were selected based on low MTSI values. Overall, SP3, SP11 are selected as per MTSI. SP21, SP15 and SP7 showed high yield potential and stability as per SSI for Pi, Gai, Wi and S6 stability models. These findings offer valuable for developing stable drought-tolerant varieties and enhancing sweet potato resilience in varying environmental conditions.