Growth performance of the clam, Meretrix meretrix, breeding-selection populations cultured in different conditions

作     者：WANG Chao CHAI Xueliang WANG Hongxia TANG Baojun LIU Baozhong 

作者机构：Institute of OceanologyChinese Academy of Sciences Zhejiang Mariculture Research Institute East China Sea Fisheries Research InstituteChinese Academy of Fisheries Sciences 

出 版 物：《Acta Oceanologica Sinica》 (海洋学报（英文版）)

年 卷 期：2013年第32卷第10期

页      面：82-87页

核心收录：

学科分类：090801[农学-水产养殖] 0908[农学-水产] 09[农学] 

基　　金：The National High Technology Research and Development Program of China (863 Program) under contract No.2012AA10A410 National S&T Support Program under contract No.2011BAD13B09 the Key Technologies R&D Program of Jiangsu under contract No.BE2011372 

主　　题：Meretrix meretrix mass selection shell color patterns growth analysis 

摘      要：A breeding-selection program for the clam, Meretrix meretrix, was conducted since 2004. Two of the selec- tion populations were generated with the shell color pattern as an additional selection criterion and named as SP （purple stripes） population and SB （black dots） population. The third-generation SP and SB popula- tions （08G3SP and 08G3SB, respectively） were cultured at two commercial clam farms and a nursery pond and their shell lengths were compared. 08G3SB clams had significantly larger sizes than 08G3SP clams at commercial clam farms （p 〈 0.05）, yet 08G3SB individuals were significantly smaller than 08G3SP individ- uals at the nursery pond （p 〈 0.05）. Then, we examined the growth of the fourth-generation SP and SB populations （10G4SP and 10G4SB, respectively） at a commercial farm, and found that the shell lengths of the 10G4SB clams increased at a significantly higher growth rate than the 10G4SP clams （p 〈 0.05） from May to September, when the water temperature was between 24.2-27.5℃, while 10G4SB lost the growth advantage in the other months. These results indicated that SP and SB populations responded differently to environmental factors, so it is beneficial for the clam farmers to select a suitable population according to the culture environment. Furthermore, a diallel mating of the SB and SP populations was designed to investigate whether their hybrid population would show heterosis. However, the heterosis was not shown in this study, which might result from the slight genetic divergence between SB and SP populations.