Indirect Selection


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Indirect Selection

 

in biology, a factor in the evolution of characters indirectly connected with those characters that undergo natural selection. For example, an increase in fertility is an indirect result of more intensive selection, which is as a rule accompanied by intensified elimination. Indirect selection also refers to those cases in which characters change that are correlatively associated with characters that yield an advantage in selection. Thus, in sexual selection among vertebrates, the reactive thresholds of the tissues of the more active males to the effects of the male sex hormones are lowered, leading to the more intensive development of the sex characters in those animals.

References in periodicals archive ?
Indirect selection via ED and PD will only be efficient in increasing FF if concomitant indirect effects via NS are taken into consideration.
Magnitudes of genotypic correlations were higher than phenotypic ones for most analyzed traits, demonstrating greater importance of genotypic component than environment component for traits expression indicating the possibility of success in indirect selection for a desired characteristic.
The indirect selection response of the target traits by selecting indicator traits (correlated response per generation) was compared to the direct selection responses of the target traits after one generation by selecting the target traits (expected genetic gain per generation).
In the frame of the main purpose to develop shorter statue of the common wheat cultivars for rainfed conditions to cope with drought effects, determination of heritability for some yield parameters, genetic correlations and relative effect of indirect selection comparing to direct selection were the aims of this study.
The strength of indirect selection on female mating preferences.
There will thus be less of a likelihood that fixation of such mutations will be opposed by indirect selection imposed by natural enemies or other environmental factors.
In addition, the divergence of CL flowering date between FP and HL populations is strengthened by indirect selection on correlated traits (Bennington 1994).
The indirect selection, both on 42 DAI and on AUDPCI, promoted satisfactory indirect gains in AUDPCS, being superior compared to direct gains, which could be observed in both environments (Tables 2 and 3).
Thus, the objective of this research was to identify feijoa fruits traits for indirect selection of pulp weight.
Positive associations of such traits indicated especially that such variables can be applied for direct and indirect selection in yield breeding programmes.
Indirect selection in early generations through traits correlated with seed yield is one of the most important strategies in plant breeding.
Thus, early evaluation or indirect selection using correlated traits are of great interest in plant improvement under abiotic stress because they accelerate the process of selection by immediately discarding less promising genotypes, thus concentrating on potentially accessible resources.