Grain Yield of Dual-Purpose Barley Genotypes Evaluated by AMMI, BLUP and Non Parametric Measures

Abstract:

AMMI analysis of twenty-three dual purpose barley genotypes evaluated at ten locations in the northern hills zone of the country observed highly significant variations due to environments (71.8%), G x E interactions (21.5%), and genotypes (3.3%). Further Interaction effects partitioned into seven Interaction principal components totaled for more than 98.6% interactions sum of square variations. The first two AMMI components accounted for total of 62.8% of the total variation.   Values of IPCA1 pointed for G17, G16, G11 while as per IPCA-2, genotypes G2, G8, G18 would be of choice. Stable performance of G20, G5, G19genotypes had identified by ASV & ASV1 measures. Values of MASV1 & MASV identified G19, G22, G20 barley genotypes. BLUP-based measures settled for G18, G9, G5 genotypes. Non parametric measures S_iⁱobserved the suitability of G19, G20, G15where non parametric composite measures also identified the same set of genotypes G15, G19, G20.Biplot analysis showed S_i¹, S_i², S_i³, S_i⁴, S_i⁵,S_i⁶ ,S_i⁷,NP_i ⁽¹⁾, NP_i ^(2), NP_i ⁽³⁾, NP_i ^(4), MASV, MASV1 measures accounted more in first principal component whereas Mean, Average, HMPRVG, PRVG, IPC5, GM, HM were major contributors  for second principal component. Very tight positive relationships observed for NP_i⁽²⁾ , NP_i⁽³⁾ , NP_i⁽⁴⁾ with Stdev, IPC7, IPC4.BLUP based measures GM, HM, PRVG, HMPRVG; Average also expressed tight relationship among them in same quadrant. AMMI based measures MASV, MASV1 closely associated with Stdev, S_i² , S_i³ S_i⁵ , S_i^{6 ,} ASV  ASV1 values ^. CV observed withS_i¹ , S_i⁴ S_i⁷. This group of measures expressed no relationship with group consisted of CV,S_i¹ , S_i⁴ S_i⁷ .CV alsoexpressed no relationships IPC3, NP_i⁽³⁾, NP_i⁽⁴⁾.