Abstract
To study the permanency of response to selection for a quantitative character in finite populations and the nature of the genetic effects that contribute to this response, we have used the covariance between ancestors and descendents within populations. Effects and variances are defined for an initial equilibrium random mating monoecious population that gives rise to replicate finite populations. After a prescribed history of restricted population size, the replicate populations are expanded, and the covariance between ancestors and descendents is quantified in terms of descent measures and genetic components in the initial population as a means of determining the additive variance within populations. Several dominance components including joint dominance effects of loci contribute to the additive variance, some of which can be negative. There is always a positive contribution of additive by additive variance to the additive variance within populations, which can be large. With the new definitions of components of genetic variance within populations, selection response is formulated in the same manner as for the initial random mating population, but the components have been modified considerably by the restricted population size.
| Original language | English |
|---|---|
| Pages (from-to) | 1563-1565 |
| Number of pages | 3 |
| Journal | Proceedings of the National Academy of Sciences of the United States of America |
| Volume | 85 |
| Issue number | 5 |
| DOIs | |
| Publication status | Published - Mar 1988 |
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All Science Journal Classification (ASJC) codes
- General
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Permanency of response to selection for quantitative characters in finite populations. / Cockerham, C. C.; Tachida, H.
In: Proceedings of the National Academy of Sciences of the United States of America, Vol. 85, No. 5, 03.1988, p. 1563-1565.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Permanency of response to selection for quantitative characters in finite populations.
AU - Cockerham, C. C.
AU - Tachida, H.
PY - 1988/3
Y1 - 1988/3
N2 - To study the permanency of response to selection for a quantitative character in finite populations and the nature of the genetic effects that contribute to this response, we have used the covariance between ancestors and descendents within populations. Effects and variances are defined for an initial equilibrium random mating monoecious population that gives rise to replicate finite populations. After a prescribed history of restricted population size, the replicate populations are expanded, and the covariance between ancestors and descendents is quantified in terms of descent measures and genetic components in the initial population as a means of determining the additive variance within populations. Several dominance components including joint dominance effects of loci contribute to the additive variance, some of which can be negative. There is always a positive contribution of additive by additive variance to the additive variance within populations, which can be large. With the new definitions of components of genetic variance within populations, selection response is formulated in the same manner as for the initial random mating population, but the components have been modified considerably by the restricted population size.
AB - To study the permanency of response to selection for a quantitative character in finite populations and the nature of the genetic effects that contribute to this response, we have used the covariance between ancestors and descendents within populations. Effects and variances are defined for an initial equilibrium random mating monoecious population that gives rise to replicate finite populations. After a prescribed history of restricted population size, the replicate populations are expanded, and the covariance between ancestors and descendents is quantified in terms of descent measures and genetic components in the initial population as a means of determining the additive variance within populations. Several dominance components including joint dominance effects of loci contribute to the additive variance, some of which can be negative. There is always a positive contribution of additive by additive variance to the additive variance within populations, which can be large. With the new definitions of components of genetic variance within populations, selection response is formulated in the same manner as for the initial random mating population, but the components have been modified considerably by the restricted population size.
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U2 - 10.1073/pnas.85.5.1563
DO - 10.1073/pnas.85.5.1563
M3 - Article
C2 - 3422750
AN - SCOPUS:0023973619
VL - 85
SP - 1563
EP - 1565
JO - Proceedings of the National Academy of Sciences of the United States of America
JF - Proceedings of the National Academy of Sciences of the United States of America
SN - 0027-8424
IS - 5
ER -