Genetic parameters for cold tolerance and body weight of Chinese fleshy prawn, Fenneropenaeus chinensis
Genetic parameters for cold tolerance and body weight of Chinese fleshy prawn, Fenneropenaeus chinensis
复制标题
中国明对虾耐寒性和体重遗传参数
DOI：
10.1007/s13131-016-0845-6
复制
发表时间：
2016-06-01
影响因子：
1.4
通讯作者：
Kong Jie
中科院分区：
文献类型：
--
作者：
Li Wenjia;Luan Sheng;Kong Jie
中国明对虾（Fenneropenaeus chinensis）不能耐受低温是温带气候下的主要经济问题，因为它减少了它们的生长季节并导致越冬死亡。本研究测定了低温生长条件下体重的遗传力和耐寒性。首次对中国对虾的88个全同胞家系进行了调查和估计，为中国对虾的育种提供了重要信息。在适宜温度和低温条件下，对体重的遗传力进行了分析.中华绒螯蟹的体重变异系数为0.1580 ± 0.3075和0.1320 ± 0.0269，变异系数较大（约为21%），遗传力中等，具有较大的选育潜力。耐冷性的遗传力较低（0.0192 ± 0.0235），与0差异不显著（P0.05）。本研究还估计了耐寒性与体重之间的弱遗传相关，也显示从零开始没有显著差异（P0.05）。因此，需要进一步研究更准确的耐冷性遗传力和性状间的遗传相关。以进一步提高育种目标的实现。
The inability of Fenneropenaeus chinensis to tolerate low temperatures is of major economic concern in temperate climates, as it reduces their growing season and leads to over-winter mortality. In this study, the heritability of body weight under low grow-out temperature and cold tolerance in F. chinensis were first investigated and estimated using 88 ful-sib families, which might provide crucial information in Chinese fleshy prawn breeding programs. The heritability for body weight under suitable and low temperature of F. chinensis were both moderate (0.158 0±0.307 5 and 0.132 0±0.026 9 respectively); the large coefficient of variation (approximately 21%) and moderate estimate of heritability for body weight indicated substantial potential for selective breeding. The heritability estimate for cold tolerance was low (0.019 2±0.023 5), and showed no significant differences from zero (P>0.05). A weak genetic correlation between cold tolerance and body weight was also estimated in the present study, also showing no significant differences from zero (P>0.05). Thus, more research needs to be conducted on the more accurate heritability estimate of cold tolerance and genetic correlations between traits in F. chinensis to further improve the achievement of breeding goals.