Effect of selection on mix-spawned F1 progeny of Argopecten irradians concentricus
会议名称：《中国工程院第77场工程科技论坛·2008水产科技论坛——渔业现代化与可持续发展》
会议日期：2009年
学科分类：090801[农学-水产养殖] 0908[农学-水产] 09[农学]
基 金：supported by grants from the Guangdong provincial science and technology bureau(No.2006B20201055) the state science and technology ministry(No.2007GB2E000183) Guangdong provincial oceanic and fishery administration(No.A200608C01)
关 键 词：Argopecten irradians concentricus selection mixed spawning first filial generation(F1) growth survival response to selection realized heritability
摘 要：One hundred and twenty randomly selected adult individuals from the same *** concentricus cultured population were divided into 3 groups according to shell length:large group(shell length 4.91-6.02 cm,5.40±0.28,n=33),middle group(shell length 4.21-4.88 cm,4.50±0.18,n=49)and small group(3.31-4.18 cm,3.93±0.19,n=38),then mixed spawning was carried *** mix-spawned F progeny of these 3 groups were cultured under the same condition. The effect of parental selection on the growth performance of mix-spawned progeny was examined between three size groups through comparisons of egg number,fertilization rate,hatching rate,juvenile survival rate,survival rates over the nursing,grow-out and reproductive periods,daily growth of shell length and shell height and body weight,aiming at assaying the effect of parental selection on the reproductive, growth and survival performances of mix-spawned F progeny,and in turn providing some scientific reference for the selective breeding of the *** showed that for fertilization rate there were no significant difference between three groups(P0.05).In terms of other indices as above, F progeny of large-size parents were larger than middle ones(P0.05);those of middle-size parents were superior to small-size ones(P0.05).Responses to selection of shell height,shell length and wet weight were 2.0 ram,2.3 mm and 2.36 g respectively for progeny of large-size parents;-1.4 cm,-0.9 cm and -1.82 g respectively for progeny of middle-size parents,and -3.6 cm,-3.3 cm and -4.19 g respectively for progeny of small-size *** heritabilities of shell height,shell length and body weight were 0.253,0.274 and 0.202 respectively for F population of large-size *** directional parental selection for *** concentricus improved the growth and anti-adversity performance of mix-spawned progeny,showing that higher genetic variation was embraced in present cultured populations of *** concentricus in Beibu bay