Traits governed by non-additive gene action are reproductive traits (e.g.: fertility, viability, fitness trait, hatchability, calving, litter size) & they have low heritability. So if heritability of trait is low, heterosis will be-
Heterosis & specific combining ability (SCA) both are caused by-
Match the column: TABLE-I TABLE-II 1) In crossing a) Mating between unrelated animals of the same breed 2) In cross-breeding b) Mating of purebred (inbred) males with unrelated females 3) Out-crossing c) Crossing of two different inbred lines of the same breed 4) Top-crossing d) Crossing of two different inbred lines of different breeds 5) … Read more
Match the column: TABLE-I TABLE-II 1) Pleiotropy a) Increase heterozygosity 2) Linkage b) Increase homozygosity 3) Inbreeding c) Random mating 4) Out breeding d) Transient cause of genetic correlation 5) Panmixia e) Permanent cause of genetic correlation
Repeatability is generally estimated by-
“Resemblance between relatives” is the basis of estimation of:
Genetic gain per year is depend upon-
The unit of selection in family selection is-
The ratio of response to selection to the selection differential is termed as:
Which of the following is true about repeatability of a trait-