| 摘要: |
| 采用不平衡巢式配对的技术,构建尼罗罗非鱼(Tilapia nilotica)半同胞家系30个,估计尼罗罗非鱼数量性状的遗传力。分别对3、4、5月龄的所有家系的家系个体的体重、全长、体长、头长、躯干长、体高、尾柄长、尾柄高及体宽共9个数量性状进行测量,运用半同胞组内相关法估计尼罗罗非鱼3、4、5月龄数量性状的遗传力。结果表明, 3月龄尼罗罗非鱼数量性状遗传力的估计值较大为0.73-0.21, 4月龄尼罗罗非鱼数量性状遗传力的估计值为0.21-0.06, 5月龄尼罗罗非鱼数量性状遗传力的估计值为0.25-0.05,尼罗罗非鱼各性状的遗传力随着月龄增长而减小,遗传力在3月龄最高, 4月龄和5月龄较低并接近。本研究结果为进一步开展尼罗罗非鱼选择育种研究奠定基础。 |
| 关键词: 尼罗罗非鱼 全同胞家系 数量性状 遗传力 |
| DOI：10.11693/hyhz20150200053 |
| 分类号: |
| 基金项目:国家现代农业产业技术体系,CARS-49号;广西八桂学者建设工程专项经费资助。 |
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| ESTIMATING QUANTITATIVE TRAIT HERITABILITY FOR TILAPIA NILOTICA OF DIFFERENT MONTHS |
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TANG Zhang-Yang1, CNEN Wen-Zhi2, LUO Yong-Ju1, LIANG Jun-Neng1, GUO Zhong-Bao1, ZHONG Huan1, TAN Yun1, GAN Xi1, HE Rong-Xing3
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1.Guangxi Institute of Fisheries, Guangxi Key Laboratory of Aquatic Genetic Breeding and Healthy Aquaculture, Nanning 530021, China;2.College of Fisheries & Life, Shanghai Ocean University, Shanghai 201306, China;3.Nanning Zoo, Nanning 530003, China
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| Abstract: |
| We established 30 half-sib families of Tilapia nilotica in a balance nest design. The quantitative traits, including body weight, total length, body length, head length, trunk length, body depth, caudal peduncle length, caudal peduncle depth, and body width of each family were measured in age of 3, 4, and 5 months, to estimate the heritability of the quantitative traits in half-sib families theory. Results show that the heritability for 3-month-old fish was 0.73-0.21 greater than those of 4-month-old for 0.21-0.06 and 5-month-old for 0.25-0.05. Therefore, the heritability decreased with the months. The results provide useful information for T. nilotica breeding. |
| Key words: Tilapia nilotica full-sibs family quantitative traits heritability |
