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Genotype × environment interaction and selection of maize (Zea mays L.) hybrids across moisture regimes
Field Crops Research ( IF 5.6 ) Pub Date : 2021-07-08 , DOI: 10.1016/j.fcr.2021.108224
Ashok Singamsetti 1 , J.P. Shahi 1 , P.H. Zaidi 2 , K. Seetharam 2 , M.T. Vinayan 2 , Munnesh Kumar 1 , Saurav Singla 3 , Kumari Shikha 1 , Kartik Madankar 1
Affiliation  

Genotype × environment (GE) interaction effect is one of the major challenges in identifying cultivars with stable performance across environments and years. Objective of the present study was to identify maize hybrids with high and stable yields under different soil moisture regimes such as drought, waterlogged and well-watered conditions. The trials were carried out in subsequent winter (Rabi) and summer-rainy (Kharif) seasons of 2017 and 2018 totaling seven test environments at the two different locations of India viz, Banaras Hindu University, Varanasi and CIMMYT, Hyderabad. After observing substantial and statistically significant GE interaction for studied traits, the phenotypic stability of maize hybrids was analyzed by AMMI, GGE biplot and multi-trait stability index (MTSI) methods. The study emphasized on the significance of AMMI and GGE biplots in deciphering the GE interactions based on grain yield data. Estimation of stability indices, WAASB (Weighted Average of Absolute Scores from the singular value decomposition of the matrix of BLUPs) for the GE interaction effects and WAASBY (a combination of WAASB and yield) scores for identification of the best suitable genotypes with high stability and maximum yield potential was highlighted. The investigation delineated the applicability of MTSI that computed based on the genotype-ideotype distance considering the multiple variables. The methods studied were concordant in the identification of the promising maize hybrids with high mean performance and greater phenotypic stability across the different soil moisture conditions.



中文翻译:

不同水分条件下玉米(Zea mays L.)杂交种的基因型×环境相互作用和选择

基因型×环境(GE)相互作用效应是鉴定跨环境和年份性能稳定的品种的主要挑战之一。本研究的目的是鉴定在不同土壤水分状况(如干旱、淹水和充足浇水条件)下具有高产和稳定产量的玉米杂交种。这些试验是在随后的 2017 年和 2018 年的冬季 ( Rabi)和夏季雨季 ( Kharif )进行的,在印度的两个不同地点共七个测试环境,, Banaras 印度大学,瓦拉纳西和 CIMMYT,海得拉巴。在观察到研究性状的实质性和统计上显着的 GE 相互作用后,通过 AMMI、GGE 双标图和多性状稳定性指数 (MTSI) 方法分析了玉米杂种的表型稳定性。该研究强调了 AMMI 和 GGE 双标图在破译基于谷物产量数据的 GE 相互作用方面的重要性。稳定性指数的估计、用于 GE 相互作用效应的 WAASB(来自 BLUP 矩阵奇异值分解的绝对分数的加权平均)和用于鉴定具有高稳定性和高稳定性的最佳合适基因型的 WAASBY(WAASB 和产量的组合)分数突出了最大产量潜力。该调查描述了基于基因型-意识形态距离计算的 MTSI 的适用性,同时考虑了多个变量。所研究的方法在鉴定具有高平均性能和在不同土壤水分条件下具有更大表型稳定性的有前途的玉米杂交种方面是一致的。

更新日期:2021-07-08
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