Productive Performance in Local Chicken After Five Generations of Crossing and Selection for High Live Body Weight

Abstract

ABSTRACT:This study was conducted to evaluate the effect of selection on the productive performance of local chicken line, Giza M-2 line, after 5 generations of selection for increasing 6-week live body weight (LBW). The performance of Giza M-2 and Random Bred Control (RBC) lines; LBW, LBW at sexual maturity (BWSM), egg number (EN), egg weight (EW), and first egg weight (FEW) were evaluated at the 3 rd (G3), 4 th (G4), and 5 th (G5) generations. The Random Bred Control line (RBC) was used as a control group. The results could be summarized as follow: There was significant improvement in 6-week LBW for Giza M-2 line from one generation to the next. The difference between Giza M-2 line and RBC line was 358 g after five generations of selection for increasing 6-week LBW. Also, females of Giza M-2 line had significantly higher BMSW, EN, EW, and FEW with comparison to the RBC line for all generations. In conclusion, there was positive response in LBW and egg productive performance in Giza M-2 line associated with our breeding program. Also, selection in Giza M-2 line may had large impact on frequency of genes controlling economically important traits, such as LBW and reproduction. In Giza M-2 line, future generations, to achieve proper meat production, we will focus on genetic selection of traits relevant to modern broiler breeding.

Increasing Heat Tolerance in Broiler by Using Thermal Manipulation During Embryonic Development

“…There has been a great increase in the demand, during the past years, for poultry production including meat and egg production associated with its low cost, good nutritional profile and suitability for further processing. This growing demand in poultry products has led to progressive increases in genetic selection not only for producing fast-growing birds [1,2] and increase egg production from egg type chicken [3] but also to use of poultry and chick embryos in medical research and pharmaceutical industry [4]. Therefore, it is necessary to know the environmental factors that affect poultry production efficiency and growth performance.…”

Poultry as an Experimental Animal Model in Medical Research and Pharmaceutical Industry

“…Moreover, current forecasts and projection studies have predicted that the expansion of the poultry market will continue in the future. This growing demand has led to progressive improvements in genetic selection to produce fast-growing birds [1][2][3] and increase egg production from egg type chicken [4]. On the other hand, in recent years poultry were used not only as experimental animal model in pharmaceutical and medical research but also in in the pharmaceutical industry because of its advantages such as their short breeding time, simple management, and high productivity are of interest for recombinant therapeutic production in their eggs [5].…”