Although sexual selection can provide benefits to both sexes, it also can be costly because of expanded opportunities for intersexual conflict. We evaluated the role of sexual selection in a naturally promiscuous species, Drosophila melanogaster. In two replicate populations, sexual selection was removed through enforced monogamous mating with random mate assignment or retained in promiscuous c...

A combination of divergent natural and sexual selection is a powerful cause of speciation. This conjunction of evolutionary forces may often occur when divergence is initiated by ecological differences between populations because local adaptation to new resources can lead to changes in sexual selection. The hypothesis that differences in resource use contribute to the evolution of reproductive ...

This article examines the history of silkworm breeding, role breeding in national economy Republic Uzbekistan and development industry. is because interrelationship traits economic value great importance selection work. The experiments were conducted 2015-2017 at Silk Research Institute Uzbekistan. life expectancy experimental butterflies was 10.9-12.8 days variability 33.9-56.6%. coefficient i...