Estimation of Breeding Values and Selection for Average Daily Weight Gain of Stress Negative Piétrain Boars

Abstract

    This study was conducted to estimate breeding values (BV) of average daily weight gain BLUPs method of stress negative Piétrain pigs raised at Dong Hiep livestock farm, Hai Phong province and Animal farm of Vietnam National University of Agriculture. The data of 373 individuals were used to estimate breeding values. In addition, BV estimates of 20 sires and average daily gain of 504 stress negative Piétrain pigs (245 boars and 259 gilts) born from these 20 sires were used to estimate relationship between breeding values of sires and average daily weight gain of progenies. The results showed that there was a positive association between breeding values of sires and average daily gain of progenies. Average daily gain of progenies from the top 5% sires according to BV estimate was 551.20 g/day. These values decreased to 546.07, 536.94 and 530.50 g/day when selection intensity decreased to 10%, 15% and 20%, respectively. Based on estimates of breeding value by BLUP for the stress negative Piétrain boars the the productivity performance of progenies was improved: the selected boar proportions 5, 10, 15, 20% improved 13.25; 12.20; 10.32; and 9%, respectively, of the average daily gain of progenies.