Several studies were conducted on evaluation of heterosis, maternal and reciprocal-effects for different chicken breeds. However, there is a limited information the reciprocal-effect crossbreed Fayoumi White Leghorn. Therefore; this study was designed to evaluate reciprocal effects traits Leghorn from day-old age at first egg. A total six hundred chicks selected,150 each genotype evaluated simu...

Among life history traits, offspring size has one of the most direct impacts on fitness, influencing growth, recruitment and survival individual, therefore affecting population, ultimately macroevolutionary outcomes. Despite its ecological evolutionary importance, little is known about how varies in lineages over timescales, especially for colonial organisms. Here, we use cheilostome bryozoan g...

As the eye changes focus, the resulting changes in cone contrast are associated with changes in color and luminance. Color fluctuations should simulate the eye being hyperopic and make the eye grow in the myopic direction, while luminance fluctuations should simulate myopia and make the eye grow in the hyperopic direction. Chicks without lenses were exposed daily (9 a.m. to 5 p.m.) for three da...

In domains with multiple competing goals, people face a basic challenge: How to make their strategy use flexible enough to deal with shifting circumstances without losing track of their overall objectives. This article examines how young children meet this challenge in one such domoin, tic-tot-toe. Experiment 1 provides an overview of development in the area: it indicates that children’s tic-ta...

This study was conducted to determine the effect of hen production cycle (HPC) and the effect of egg weight (EW) at the same egg production level on egg quality, egg composition, hatchability, duckling quality, and first-week BW in Pekin ducks. For HPC, hatching eggs were obtained from different Pekin-duck breeder flocks, aged 31 wk for the first production cycle (HPC1) and 78 wk for the second...

literatures have reported that a lot of drought related genes were cloned and individual gene showed positive effects under controlled stress experiments, but were not much effective in the field. although, the progresses by conventional breeding approaches were achievable as some drought varieties have been released to the farmers in the recent years but this is not adequate to cope up with th...