| Dai Ping,Wang Hongxia,Xiao Guoqiang,Liu Baozhong.Combining ability and heterosis analysis over two environments in a diallel cross of three families of the clam Meretrix meretrix[J].Acta Oceanologica Sinica,2014,33(10):37-42 |
| 三个文蛤家系双列杂交设计在两种环境下的配合力及杂种优势分析 |
| Combining ability and heterosis analysis over two environments in a diallel cross of three families of the clam Meretrix meretrix |
| 投稿时间：2013-05-23 修订日期：2014-01-07 |
| DOI：10.1007/s13131-014-0539-x |
| 中文关键词: 文蛤 配合力 反交效应 杂种优势 双列杂交 |
| 英文关键词:Meretrix meretrix general and specific combining ability reciprocal effects heterosis diallel cross |
| 基金项目:The National High-Tech R & D Program of China (863 Program) under contract No. 2012AA10A410; the Key Technologies R & D Program of Jiangsu Province under contract No. BE2011372. |
| 作者 | 单位 | E-mail | | 代平 | 中国科学院海洋研究所实验海洋生物学重点实验室, 青岛266071, 中国
中国科学院大学, 北京100039, 中国 | | | 王鸿霞 | 中国科学院海洋研究所实验海洋生物学重点实验室, 青岛266071, 中国 | | | 肖国强 | 中国科学院大学, 北京100039, 中国 | | | 刘保忠 | 中国科学院海洋研究所实验海洋生物学重点实验室, 青岛266071, 中国 | bzliu@qdio.ac.cn |
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| 中文摘要: |
| 利用三个文蛤家系（P1、P2和P3）3×3完全双列杂交子代，研究室内与室外养殖环境下生长性状的配合力以及杂交优势。壳长和体重的方差分析结果表明存在极显著的组合效应、环境效应以及组合环境互作效应。不同组合间和环境间的一般配合力（GCA）和特殊配合力（SCA）差异显著。综合两个环境来看，在3个家系中，家系P2的两个性状的一般配合力最高，家系P1和P3组合的特殊配合力最高，另外，存在显著的反交效应。在单个环境下，约半数的杂交组合在壳长和体重上表现出有利的中亲杂种优势（MPH > 1%）。数据显示，非加性遗传效应和反交效应构成了壳长和体重的遗传变异的主要来源，这表明有选择的家系间的杂交可以进一步发掘杂种优势。 |
| 英文摘要: |
| A 3×3 complete diallel cross comprising three families of the clam Meretrix meretrix (P1, P2 and P3) was used to determine the combining ability of parental families and heterosis of F1 under indoor and openair environments for growth traits. Analysis of variance for shell length and whole body weight indicated highly significant cross effects, environment effects and the interaction of cross by environment. General combining ability (GCA) and specific combing ability exhibited great variation among crosses and between two environments. Pooled over environments, P2 was the top combiner among the three parental families for both traits studied. The cross of P1 and P3 had the highest SCA. Additionally, significant reciprocal effects were observed. For individual environment, about half of the crossbred combinations showed favorable Mid-parent heterosis (MPH) (>1%) for the shell length and whole body weight. Our data has shown that non-additive genetic and reciprocal effects constituted the major sources of genetic variation for both shell length and whole body weight, which indicates that crossbreeding among selective families could further explore the heterotic effects. |
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