| DENG Yuewen,LIU Xiao,WU Fucun,ZHANG Guofan. 2008. Experimental evaluation of heterobeltiosis and heterosis between two populations of Pacific abalone Haliotis discus hannai Ino. Acta Oceanologica Sinica, (4):112－119 |
| Experimental evaluation of heterobeltiosis and heterosis between two populations of Pacific abalone Haliotis discus hannai Ino |
| Experimental evaluation of heterobeltiosis and heterosis between two populations of Pacific abalone Haliotis discus hannai Ino |
| Received:January 28, 2007 Revised:February 26, 2008 |
| DOI： |
| Key words:Haliotis discus hannai Ino population mating heterobeltiosis heterosis |
| 中文关键词: Haliotis discus hannai Ino population mating heterobeltiosis heterosis |
| 基金项目:The National High-Technology Research and Development Plan under contract No. 2006AA10A407 and the National Natural Science Foundation of China under contract No. 30371117. |
| Author Name | Affiliation | E-mail | | DENG Yuewen | Institute of Oceanology, Chinese Academy of Sciences, Qingdao 266071, China
Fisheries College, Guangdong Ocean University, Zhanjiang 524025, China | | | LIU Xiao | Institute of Oceanology, Chinese Academy of Sciences, Qingdao 266071, China | liuxiao@ms.qdio.ac.cn | | WU Fucun | Institute of Oceanology, Chinese Academy of Sciences, Qingdao 266071, China | | | ZHANG Guofan | Institute of Oceanology, Chinese Academy of Sciences, Qingdao 266071, China | |
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| Abstract: |
| A2×2 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 day 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. |
| 中文摘要: |
| A2×2 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 day 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. |
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