Genetic effects of embryo and endosperm for four malting quality traits of barley |
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Authors: | Xinfu Yan Jun Zhu Shaoying Xu Yonghan Xu |
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Institution: | (1) Department of Agronomy, Zhejiang Agricultural University, Hangzhou, 310029, P.R, China |
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Abstract: | Seed of seven cultivars of two-rowed barley (Hordeum Vulgare L.) and F2 seed from a half-diallel set of crosses among the
cultivars were malted in two years to obtain data on diastatic power (DP), alpha-amylase activity (αAA), beta- amylase activity
(βAA) and malt nitrogen (N) content. Embryo and endosperm genetic effects on the traits were studied by using a genetic model
including genotype × environment interaction for malting quality characters. Variation of the four malting quality traits
was affected by gentic effects and environmental interaction. Performance of DP and βAA was mainly controlled not only by
endosperm dominance effects but also by embryo genotype × environment interaction and endosperm dominance × environment interaction.
Variation of αAA and malt N content was controlled by both embryo and endosperm genetic effects, but the embryo dominance
and endosperm additive effects contributed a major part to the total genetic effects. Significant interaction variances (embryo
additive × environment and dominance × environment and endosperm dominance × environment) were also observed for αAA and malt
N content. Diastatic power was related positively to βAA. Malt N content was associated positively with DP, largely because
of the relationship between malt N and βAA. No obvious phenotype association between DP and αAA was found. General narrow-sense
heritabilities of αAA and malt N content were 26.1% and 27.8%, respectively.
This revised version was published online in July 2006 with corrections to the Cover Date. |
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Keywords: | α - and beta-amylase barley diastatic power embryo and endosperm genetic effects malt N |
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