tailieunhanh - Báo cáo sinh học: "Genetic interaction between sire and population of mates in Drosophila melanogaster"

Tuyển tập các báo cáo nghiên cứu về sinh học được đăng trên tạp chí sinh học Journal of Biology đề tài: Genetic interaction between sire and population of mates in Drosophila melanogaster | Genet Sei Evol 1994 26 253-261 Elsevier INRA 253 Original article Genetic interaction between sire and population of mates in Drosophila melanogaster CM Wade JW James University of New South Wales Department of Wool and Animal Science PO Box 1 Kensington NSW 2033 Australia Received 8 May 1992 accepted 3 January 1994 Summary - A model experiment was set up to examine the level of genotype-environment interaction existing between a sire and the population from which its mates were drawn. The character considered was left sternopleural bristle number in Drosophila melanogaster. A total of 128 males scored for the trait were mated to females of the same and another strain. The characteristic was then measured in both the pure and crossbred progeny and the heritabilities for the trait in each group were determined. The genetic correlation between pure and crossbred performance standard error estimated from covariances was found to be significantly different from one indicating the presence of genetic interaction. The heritability of purebred performance by regression analysis was found to be and the heritability of crossbred performance . The corresponding average values from sib analysis were and respectively. A comparison of responses from different selection methods incorporating the estimated parameters found that selection on the basis of sire s own performance led to the largest improvement in the performance of crossbred progeny. The implications of the results are discussed. genotype environment interaction genetic correlation between purebred and crossbred performance sternopleural bristles Drosophila melanogaster Resume - Interaction génétique entre géniteur et population des partenaires chez Drosophila melanogaster. Une experience modèle a été menée pour examiner I importance de I interaction entre le géniteur et la population dont ses partenaires sont issus. Le caractère utilise est le nombre de soies sternopleurales sur le côté