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Combining Ability and the Selection of Parents for Interspecific Oat Matings 1
Author(s) -
Cox D. J.,
Frey K. J.
Publication year - 1984
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/cropsci1984.0011183x002400050033x
Subject(s) - biology , transgressive segregation , avena , cultivar , trait , transgressive , interspecific competition , yield (engineering) , grain yield , botany , agronomy , horticulture , quantitative trait locus , genetics , gene , sedimentary depositional environment , paleontology , materials science , structural basin , computer science , metallurgy , programming language
Ten accessions of Avena sterilis L. (males) were tested as sources of genes for improving productivity of cultivated oats ( A. sativa L.). They were mated with six A. sativa (females) cultivars from the north central USA, and populations of F 2 ‐derived lines in F 3 from these matings were evaluated for grain yield and biomass at three locations in Iowa and vegetative growth index at one location. Maximum specific combining ability (SCA) effects exceeded maximum general combining ability (GCA) effects for all traits in both males and females. The SCA sums of squares were intermediate in magnitude between the GCA sums of squares for males and females. Transgressive segregates, one LSD 0.005 above the high parent, were derived from every parent for each trait. However, there was a greater percentage of significantly high transgressive segregates for biomass and vegetative growth index than for grain yield (9.8, 9.0, and 3.1%, respectively). Performances of the A. sterilis accessions and A. sativa cultivars per se generally were good predictors of mean progeny performance for each trait. However, the production of extreme progeny types was more closely associated with the mean genotypic variance of a parent, as calculated over the array of matings, than with that of parental performance per se.