文献类型：期刊文献

英文题名：Realized Heritability and Genetic Gain Estimates of Larval Shell Length in the Chinese Pearl Oyster Pinctada martensii at Three Different Salinities

作者：Deng, Yuewen[1];Fu, Shao[1];Du, Xiaodong[1];Wang, Qingheng[1]

机构：[1]Guangdong Ocean Univ, Coll Fisheries, Zhanjiang 524025, Peoples R China

年份：2009

卷号：71

期号：4

起止页码：302

外文期刊名：NORTH AMERICAN JOURNAL OF AQUACULTURE

收录：SCI-EXPANDED(收录号：WOS:000272025100002)、、Scopus(收录号：2-s2.0-79954522563)、WOS

基金：This study was supported by grants from the National Key Technology Research and Development Program in the 11th Five Year Plan of China (2007BAD29B01-2) and the Guangdong Marine and Fishery Bureau (A200708C01). We thank the reviewers for their valuable comments on the manuscript.

语种：英文

外文摘要：The second-generation selected (SS) and control (SC) lines of the Chinese pearl oyster Pinctada martensii were established by selecting the 10% of breeders with the largest and mean sizes, respectively, from the first-generation selected group. Larval offspring of the SS and SC lines were reared at 30, 24, and 18 parts per thousand. Heritability and genetic gains of larval shell length were estimated on the basis of data measured at days 8, 14, and 21. At days 8 and 14, there were no significant differences in mean shell length between the SS and SC lines at 30, 24, and 18 parts per thousand (P > 0.05). On day 2 1, however, the SS line displayed significantly larger mean shell length than the SC line at 30 parts per thousand and 24 parts per thousand (P < 0.05), Heritability estimates and genetic gains for larval shell length ranged front 0.22 to 0.64 and from 3.69% to 14.93%, respectively. The results from this study indicate that considerable genetic variability exists in the base population and that mass selection for the second generation is still effective.