| 摘要: |
| 对菲律宾蛤仔中的斑马蛤、黑斑马、白斑马三品系进行混合选择, 测量了各实验组的壳长, 计算了不同品系斑马蛤的选择反应和现实遗传力。结果表明: 3个品系的上选组壳长均大于对照组, 说明单向上选是行之有效的遗传改良方法。在不同的生长发育阶段, 斑马蛤品系的选择反应(R)和现实遗传力(2Rh )出现阶段性变化, 从平均水平上看, R在幼虫期为0.688±0.184, 稚贝期为0.605±0.214, 养成期为0.670±0.120; 2Rh 在幼虫期为0.392±0.081, 稚贝期为0.344±088, 养成期为
0.380±0.058。从一周年的生长情况来看, 三个品系总的R为0.654±0.179, 斑马蛤、黑斑马蛤和白斑马蛤品系的R分别为0.655±0.155、0.525±0.116、0.782±0.170; 三个品系总的2Rh 为0.373±0.070, 斑马蛤、黑斑马蛤和白斑马蛤品系的2Rh 分别为0.372±0.042、0.300±0.028、0.445±0.031。不同品系间R和2Rh 次序为白斑马>斑马蛤>黑斑马, 说明各斑马蛤品系的选择效果是不同的, 品系间存在着一
定程度的遗传差异。 |
| 关键词: 菲律宾蛤仔 斑马蛤 品系 选择反应 现实遗传力 |
| DOI：10.11693/hyhz20121214001 |
| 分类号: |
| 基金项目:现代农业产业技术体系建设专项, CARS-48 号; 十二五863项目“主要养殖双壳贝类良种培育”, 2012AA10A400 号。 |
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| RESPONSES TO SELECTION AND REALIZEDHERITABILITY IN DIFFERENT ZEBRA STRAINS OF MANILA CLAM RUDITAPES PHILIPPINARUM |
|
Zhang Yuehuan and Yan xiwu
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Dalian Ocean University,Dalian Ocean University
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| Abstract: |
| Three different zebra strains (Z: Zebra population; AbZ: Black zebra population; and WZ: white zebra population) of Manila clam Ruditapes philippinarumwere used to test growth trait by mass selection. The shell length of progenies were measured under microscope with vernier caliper. The response to selection and realized heritability were calculated. The results show that the shell length of all selective groups were significantly higher than that of the control (P<0.05) except for the AbZ. RS and RH of Manila clam varied in different development stages. The order of the response to selection and realized heritability among different zebra strains are as follow: WZ>Z>AbZ, which may be derived from the different genetic variation among three zebra clam strains. |
| Key words: Ruditapes philippinarum zebra strain strain response to selection realized heritability |
