Experimental evaluation of heterobeltiosis and heterosis between two populations of Pacific abalone Haliotis discus hannai Ino

被引:0
|
作者
Deng Yuewen [1 ,2 ]
Liu Xiao [1 ]
Wu Fucun [1 ]
Zhang Guofan [1 ]
机构
[1] Chinese Acad Sci, Inst Oceanol, Qingdao 266071, Peoples R China
[2] Guangdong Ocean Univ, Coll Fisheries, Zhanjiang 524025, Peoples R China
基金
中国国家自然科学基金;
关键词
Haliotis discus hannai Ino; population mating; heterobeltiosis; heterosis;
D O I
暂无
中图分类号
P7 [海洋学];
学科分类号
0707 ;
摘要
A2 x 2 factorial cross between two populations of Pacific abalone Haliotis discus hannai Ino, collected separately from Dalian (D) in China and Miyagi (M) in Japan, was conducted to compare performances in fertilization rate, hatching rate, metamorphosis rate and growth at days 20, 43, 160 and 330 between purebreds (DD and MM) and crossbreds (DM and MD) and investigate the magnitude of heterobeltiosis (better parent) and heterosis (mid-parent). Heterobeltiosis and heterosis for all the traits analyzed were evidently different between crossbreds DM and MD. Heterobeltiosis in the crossbred DM varied among traits, with values of 2.5% for the fertilization rate, 2.2% for the hatching rate, -1.9% for the metamorphosis rate and 7.4% for the growth at the (lay 330. The crossbred DM displayed positive heterotic values for fertilization rate (5.4%), hatching rate (7.4%), metamorphosis rate (7.6%) and growth (12.0%) at the day 330. However, both heterobeltiosis and heterosis for all the traits in the crossbred MD were negative except those for the growth at days 20 and 43. The results indicate the importance of selecting superior hybrid varieties if the exploitation of hybrid vigor is considered in the Pacific abalone breeding program.
引用
收藏
页码:112 / 119
页数:8
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