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Genetic Analysis of Stability in Poly‐Crossed Populations of Orchardgrass
Author(s) -
Saeidnia Fatemeh,
Majidi Mohammad Mahdi,
Mirlohi Aghafakhr
Publication year - 2017
Publication title -
crop science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.76
H-Index - 147
eISSN - 1435-0653
pISSN - 0011-183X
DOI - 10.2135/cropsci2017.01.0020
Subject(s) - dactylis glomerata , biology , ammi , biomass (ecology) , gene–environment interaction , agronomy , genetic variation , selection (genetic algorithm) , genotype , interaction , microbiology and biotechnology , botany , poaceae , genetics , artificial intelligence , gene , computer science
Development of synthetic varieties is the most common breeding method in cross‐pollinated grasses. In these plants estimation of general combining ability (GCA) as well as the amount of interaction between additive effects and environment (AE) is of paramount importance. There is a lack of knowledge in orchardgrass ( Dactylis glomerata L.) about the effect of genetic and stability analysis using poly‐crossed mating system. Half‐sib families derived from polycross of 25 orchardgrass genotypes were evaluated under two moisture environments (normal and drought stress) in the field during 5 yr (2010–2014). High genotypic variation was observed among families. The results showed that additive main effects and multiplicative interaction (AMMI) analysis along with regression method were useful in selection for plant biomass improvement where additive × environment interactions are present. Some genotypes were identified as the most stable across the environments as well as having high GCA for plant biomass. The results indicated that finding parental genotypes for synthetic varieties which can transmit both high plant biomass and stability is possible in orchardgrass.