| 引用本文: | 张跃环,王昭萍,喻子牛,闫喜武.香港牡蛎(Crassostrea hongkongensis)与长牡蛎(Crassostrea gigas)种间杂种遗传力评估.海洋与湖沼,2014,45(6):1367-1373. |
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| 香港牡蛎(Crassostrea hongkongensis)与长牡蛎(Crassostrea gigas)种间杂种遗传力评估 |
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张跃环,王昭萍②,闫喜武,喻子牛
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中国科学院南海海洋研究所热带海洋生物资源与生态重点实验室,中国科学院南海海洋研究所热带海洋生物资源与生态重点实验室;中国海洋大学水产学院教育部重点实验室;大连海洋大学水产与生命学院,大连海洋大学水产与生命学院,中国科学院南海海洋研究所热带海洋生物资源与生态重点实验室
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| 摘要: |
| 以平衡巢式设计(1长牡蛎♂: 3香港牡蛎♀)构建的45个香港牡蛎(Crassostrea hongkongensis)×长牡蛎(Crassostrea gigas)种间杂交家系为材料, 对其生长、存活及产量性状狭义遗传力进行了评估, 并对其两两对应性状表型相关及遗传相关进行了分析。结果表明: (1) 生长性状的遗传力大小为0.6207—0.8785, 以父系半同胞组内相关法估计的幼虫15日龄、稚贝180日龄、幼贝360日龄壳高遗传力分别为0.6355、0.4828、0.5787, 其360日龄鲜重遗传力为0.7740; (2) 存活性状的遗传力大小为0.2748—0.3957, 以父系半同胞组内相关法估计的幼虫15日龄、稚贝180日龄、幼贝360日龄存活率遗传力分别为0.1900、0.2939、0.4064; (3) 产量是生长与存活的共同作用结果, 360日龄产量的遗传力及以父系半同胞组内相关法估计的遗传力分别为0.6706、0.5018。从其生长相关性上看, 幼虫期与稚贝期出现了微弱负向相关; 除了幼虫期与幼贝期的壳高及产量, 及其稚贝期与幼贝产量间无相关性以外; 其它的两两生长性状间均为显著正相关。从存活与产量的相关性上看, 无论是表型性状, 还是遗传性状均出现了积极的正相关, 以遗传相关为主。本研究为建立远缘杂交育种方法和策略提供必要的理论依据。 |
| 关键词: 香港牡蛎 长牡蛎 表型性状 杂种遗传力 |
| DOI：10.11693/hyhz20131100179 |
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| 基金项目:国家自然科学基金项目资助, 31402299 号, 31172403 号; 国家重点基础研究发展规划项目资助, 2010CB126406 号; 现代农业产业技术体系建设专项资助, CARS-48 号 |
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| EVALUATION ON CROSS-HERITABILITY OF INTERSPECIFIC HYBRIDS BETWEEN FEMALE CRASSOSTREA HONGONGENSIS AND MALE CRASSOSTREA GIGAS |
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ZHANG Yuehuan,WANG Zhaoping②,YAN Xiwu and YU Ziniu
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Key Laboratory of tropical marine biological resources and ecology,South China Sea Institute of Oceanology,SChinese Academy of Sciences,Key Laboratory of tropical marine biological resources and ecology,South China Sea Institute of Oceanology,SChinese Academy of Sciences;Key Laboratory of Mariculture Ministry of Education,Fisheries College,Ocean University of China;Engineering Research Center of Shellfish Culture and Breeding of Liaoning Province,College of Fisheries and Life Science,Dalian Ocean University;China,Engineering Research Center of Shellfish Culture and Breeding of Liaoning Province,College of Fisheries and Life Science,Dalian Ocean University,Key Laboratory of tropical marine biological resources and ecology,South China Sea Institute of Oceanology,SChinese Academy of Sciences
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| Abstract: |
| We estimated the heritability and genetic correlations of interspecific hybrids between female Crassostrea hongongensis and male Crassostrea gigas by nest 45 hybrid families (3 ♀: 1 ♂). The results are followed. (1) The growth heritability of paternal half-sibs, maternal-sibs, and full sibs were 0.6355, 1.1215, 0.8785 for larvae, 0.4828, 0.7586, and 0.6207 for spat, 0.5787, 0.8681, and 0.7234 for adult shell height, and 0.6706, 0.8774, and 0.7740 for adult living weight, respectively. (2) The survival heritability of paternal half-sibs, maternal-sibs and full-sibs were 0.1900, 0.5520, and 0.3710 for larvae, 0.2939, 0.2556, and 0.2748 for spat, 0.4064, 0.3850, and 0.3957 for adult, respectively. (3) The yield heritability of paternal half-sibs, maternal-sibs, and full sibs were 0.5018, 0.8413, and 0.6715 for adult on day 360. In growth genetic correlations, no correlation was found between larvae height and adult yield and between spat height and adult yield. However, weak negative correlation was found between larvae and spat, and strong positive correlation between a pair of growth traits. Positive correlation was observed between survival and yield in both genetic and phenotypic aspects. This study may offer a guide for establishing a distant hybridization breeding strategy in the aquacultural practice. |
| Key words: Crassostrea hongkongensis Crassostrea gigas phenotypic traits cross-heritability |
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