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Heritable and Nonheritable Relationships and Variability of Agronomic Characters in Successive Generations of Soybean Crosses 1
Author(s) -
Bartley B. G.,
Weber C. R.
Publication year - 1952
Publication title -
agronomy journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.752
H-Index - 131
eISSN - 1435-0645
pISSN - 0002-1962
DOI - 10.2134/agronj1952.00021962004400090008x
Subject(s) - agricultural experiment station , forage , agriculture , agronomy , crop , agricultural science , wish , sociology , biology , ecology , anthropology
'RMANENT gain from selection, in the sense of resemPrbl ance betwen offspring and their parents, depends on the degree of relationship between genotype and phenotype. Total variance of an attribute in a segregating popularion is composed of a heritable portion, an environmental portion, and a portion due to genotype-environment interaction. Heritable variance is divided into: (1) additively genetic variance, (2 ) dominance variance, or the interaction of alleles, and (3) epistatic variance, or the interaction of-nonallelic genes. The correspondence between genotype and phenotype of a trait is expressed by heritability of the trait. Lush ( 4 ) defined heritability in two ways. In the broad sense, heritability refers to the ratio of heritable variance to total variance. In the narrow sense, heritability is d,efined as the ratio of additively genetic variance to total variance.