Social selection offers an alternative to sexual selection by reversing its logic. Social selection starts with offspring production and works back to mating, and starts with behavioural dynamics and works up to gene pool dynamics. In social selection, courtship can potentially be deduced as a negotiation, leading to an optimal allocation of tasks during offspring rearing. Ornaments facilitate ...

The article discusses the presence in middle reaches of Seversky Donets River Khazar burials carried out by rite cremation, which are known upstream river, within forest-steppe. Previously, only such burial ground this, steppe, territory was considered "burial 2" archaeological complex Mayaki. In recent years, discovery three more necropolises steppe zone has been announced. mapping complexes n...

Introduction Sweetpotato is a vegetatively propagated, highly heterozygous and outcrossing crop. Genetic improvement of sweetpotato complicated because the hexaploid nature The objective this study was to assess genetic compatibility between accessions collected from Niger Nigeria select best parents for next hybridisation block develop new farmer varieties. Materials Methods experiment conduct...

Upland cotton (Gossypium hirstum L.), which produces more than 95% of the world natural cotton fibers, has a narrow genetic base which hinders progress in cotton breeding. Introducing germplasm from exotic sources especially from another cultivated tetraploid G. barbadense L. can broaden the genetic base of Upland cotton. However, the breeding potential of introgression lines (ILs) in Upland co...

Abstract The complete diallel cross is the only mating design that provides estimates of variance components general combining (GCA), specific ability (SCA), maternal and reciprocal effects, in addition to heritabilities genetic correlations. To obtain such estimates, diallels were made among 10 trees each three natural Norway spruce populations from altitude 300 500 m southern Norway. Seedling...

According to the RGB law display, polymorphism of giant clam mantle color pattern is through four iridocytes. The boring ( Tridacna crocea ) exhibits diverse colors, including blue, green, purple, gold, and orange. In order evaluate genetic laws driving these patterns, a complete diallel cross between two strains [blue strain (only blue iridocyte) yellow-green (yellow green iridocytes)] was per...

The effect of light on the sexual competence of a light-sensitive mating type minus strain (mt(-)) of Chlamydomonas eugametos obtained by crossing a light-sensitive mating type plus strain (mt(+)) with a light-insensitive mt(-) strain is described. As previously demonstrated for the mt(+) parent, this study of one of the mt(-) offspring shows that (a) a light-sensitive mechanism affects flagell...