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采用完全双列杂交配组方法和加性-显性遗传模型,在水泥池和网箱两种不同放养密度的养殖环境中,对尼罗罗非鱼(Oreochromis niloticus)、奥利亚罗非鱼(O.aureus)及这两种罗非鱼的正、反杂交后代,从与生长相关的体重、全长、体长、体高、体宽及肥满系数共6项性状,分析基因型×环境互作遗传效应,并进行性状间的相关分析。结果表明:(1)4种罗非鱼的体重性状主要受加性遗传效应控制;全长、体长、体宽三个性状主要受显性基因效应控制,通过杂交可发挥这些性状的育种潜力,早代选择可获得较好的育种效果。(2)奥利亚罗非鱼在两种环境中各性状的显性×环境互作效应都表现为负向,尼罗罗非鱼生长性状的基因型×环境互作效应较为复杂,尼奥杂交鱼需要在合适的环境中才能得到更好的生长表现。(3)除肥满系数与其它各性状间相关关系较小之外,体重、全长、体长、体高、体宽5个性状相互之间的表型相关在0.893~0.981,而遗传相关在0.904~0.993之间,表明这5个性状相互极显著正相关。
Using complete diallel cross matching method and additive-dominance genetic model, the effects of Oreochromis niloticus, Oreochromis niloticus (O.aureus) and their offsprings were used to analyze the genotype × environment from 6 traits related to growth, such as body weight, length, body length, body width and fatness coefficient Interaction between the genetic effects, and correlation analysis of traits. The results showed that: (1) The body weight traits of four species of tilapia were mainly controlled by additive genetic effect. The three traits of full length, body length and body width were mainly controlled by dominant gene effect. The potential of breeding of these traits , Early selection can get better breeding results. (2) The dominant × environmental interaction effects of all the traits of Oreochromis niloticus showed negative in both environments. The genotype × environment interaction of growth traits of Nile tilapia was more complicated. Hybrid fish need to get better growth performance in the right environment. (3) In addition to the correlation coefficient between the plumpness coefficient and other traits was small, the phenotypes of the five traits such as body weight, length, body length, body height and body width were 0.893 ~ 0.981, while the genetic correlation was 0.904 ~ 0.993, indicating that these five traits were significantly and positively correlated with each other.