tailieunhanh - Báo cáo sinh học: "Inheritance of fertility in broiler chickens"

Tuyển tập các báo cáo nghiên cứu về sinh học được đăng trên tạp chí sinh học quốc tế đề tài: Inheritance of fertility in broiler chickens | Genetics Selection Evolution BioMed Central Research Inheritance of fertility in broiler chickens Anna Wolc 1 Ian MS White2 Victor E Olori3 and William G Hill2 Address Department of Genetics and Animal Breeding Poznan University of Life Sciences Wolynska 33 60-637 Poznan Poland institute of Evolutionary Biology University of Edinburgh West Mains Road Edinburgh EH9 3JT UK and 3Aviagen Ltd Newbridge Midlothian EH28 8SZ UK Email Anna Wolc - awolc@ Ian MS White - Victor E Olori - volori@ William G Hill - Corresponding author Open Access Published 29 October 2009 Received 9 June 2009 Genetics Selection Evolution 2009 41 47 doi 1297-9686-41 -47 Accepted 29 October 2009 This article is available from http content 41 1M7 2009 Wolc et al licensee BioMed Central Ltd. This is an Open Access article distributed under the terms of the Creative Commons Attribution License http licenses by which permits unrestricted use distribution and reproduction in any medium provided the original work is properly cited. Abstract__ Background The fertility of a chicken s egg is a trait which depends on both the hen that lays the egg and on her mate. It is also known that fertility of an individual changes over the laying period. Methods Longitudinal models including both random genetic and permanent environmental effects of both the female and her male mate were used to model the proportion of fertile eggs in a pedigree broiler population over the ages 29-54 weeks. Results Both the male and the female contribute to variation in fertility. Estimates of heritability of weekly records were typically 7 for female and 10 for male contributions to fertility. Repeatability estimates ranged from 24 to 33 respectively. The estimated genetic variance remained almost constant for both sexes over the laying period .