SASHAYDIALL: A SAS Program for Hayman’s Diallel Analysis

Crop Science

Alvarado, Gregorio^2¹  Makumbi, Dan^1² 

[1] Biometrics and Statistics Unit, International Maize and Wheat Improvement Center (CIMMYT), Apdo. Postal 6-641, 06600, Mexico DF, Mexico^2;International Maize and Wheat Improvement Center (CIMMYT), PO Box 1041-00621, Nairobi, Kenya^1

关键词: a;    additive genetic effects;    b;    dominant genetic effects;    c;    average maternal effects of each parental line;    d;    variation in the reciprocal differences not attributed to c;    D;    component of variation due to additive effect of genes;    DTA;    days to anthesis;    F;    relative frequency of dominant and recessive alleles in the parents;    GCA;    general combining ability;    H 1;    component of variation due to dominance effects of genes;    H 2;    dominance component indicating asymmetry of positive and negative effects of genes;    h 2;    overall mean dominance effect of heterozygous loci;    H 2;    broad-sense heritability;    h 2;    narrow-sense heritability;    LSI15;    leaf shape index of the 15th wrapper leaf;    SCA;    specific combining ability;    V r;    the variance among family (F 1 + reciprocal) means within an array;    V ri;    expected variance;    W r;    covariance between families within the i th array and their nonrecurrent parent;    W ri;    parent–offspring covariance;    W15;    width of the 15th wrapper leaf;    Y r;    mean parental value;   

DOI  :  10.2135/cropsci2018.01.0047

学科分类：农业科学（综合）

来源: Crop Science

【 摘 要 】

Different methods of diallel crossing are commonly used in plant breeding. The diallel cross analysis method proposed by Hayman is particularly useful because it provides information, among others, on additive and dominance effects of genes, average degree of dominance, proportion of dominance, direction of dominance, distribution of genes, maternal and reciprocal effects, number of groups of genes that control a trait and exhibit dominance, ratio of dominant to recessive alleles in all the parents, and broad-sense and narrow-sense heritability. In this paper, we fully describe a SAS-based software SASHAYDIALL for performing a complete diallel cross analysis based on Hayman’s model with or without reciprocals. We demonstrate the use of SASHAYDIALL with two data sets; one is a published diallel cross data set with reciprocals in cabbage (Brassica oleracea L.), and the second is a data set from a multilocation diallel cross trial in maize (Zea mays L.) without reciprocals. With SASHAYDIALL, diallel experiments conducted in single sites can be analyzed to estimate various genetic parameters, and this analysis is extended over locations or environments to assess genetic effect × environment interaction. SASHAYDIALL is user-friendly software that provides detailed genetic information from diallel crosses involving any number of parents and locations.

【 授权许可】

CC BY