ÃÞ »¨ ѧ ±¨ Cotton Science 2010£¬22£¨1£©£º89- ·âÈý
Index Selection in Multi-environments Based on an Additive-dominance and Additive ¡Á Additive Model with Environment Interaction Abstract: Adaptability and stability are very important characteristics of elite cultivars. Selection upon multiple traits in various environments is a pendent item. Based on an additive, dominance and additive ¡Á additive (AA) model with environment interaction, two types of selection indices, general index and index involving in genotype by environment interaction (GE interaction index) were developed. The general selection index can be utilized for selecting cultivars with a wide adaptation potential, while the GE interaction selection index can be adopted to select lines that are adapted to specific environments. For self-fertilizing crops, two kinds of breeding values, general breeding value and breeding value related to genotype by environment interaction (GE interaction breeding value) were proposed. The first one consists of AA epistatic effects in addition to additive effect. The second is comprised of effects of additive ¡Á environment interaction and AA ¡Á environment interaction. Mixed linear model approaches were employed to estimate variance-covariance components of traits involved in the selection index. Data from a diallel cross of Gossypium hirsutum L. were analyzed as a working example for the construction of selection indices by using the newly developed methodology.
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