Heterosis and combining ability evaluation for growth traits of blunt snout bream (Megalobrama amblycephala) when crossbreeding three strains
Heterosis and combining ability evaluation for growth traits of blunt snout bream (Megalobrama amblycephala) when crossbreeding three strains
复制标题
团头鲂三品系杂交生长性状的杂种优势及配合力评价
DOI：
10.1007/s11434-014-0115-y
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发表时间：
2014-01
影响因子：
--
通讯作者：
Gao ZX
中科院分区：
文献类型：
--
作者：
Luo W, Zeng C, Yi S, Robinson N, Wang WM;Gao ZX
The blunt snout bream (Megalobrama amblycephala) is a major aquaculture species in the Chinese freshwater polyculture system. In this study, complete diallel crossing of three strains (i.e., Liangzi [LZ], Poyang [PY] and Yuni [YN]) was used to evaluate the combining ability and heterosis effect of intraspecific crossbreeding on the growth performance (i.e., body weight, total length, body length, body height, and Fulton’s coefficient of condition). The offspring produced from the three strains were reared in a communal pond for 20 months, and nine microsatellites were used to assess their pedigree. Of the 749 offspring, 708 (94.53 %) could be assigned directly to a single parental pair. Significant differences were observed in body weight (BW) among the different combinations, indicating that the combining ability of BW from each strain was significantly different. The general combining ability (GCA) of BW from the sire was much higher than that from the dam. The GCA for the dam and sire of the LZ and YN were the largest and the smallest, respectively. The special combining ability of YN♀ × PY♂ was the largest, and YN♀ × PY♂ showed significantly positive heterosis effects on all F1growth traits, except for Fulton’s condition coefficient (K) (P< 0.05). In addition, significant positive linear correlations were found between the mean BW of corresponding progeny and theHEof the parental generation (y= 600.7x− 29.472,r= 0.8651,P= 0.0026),HO(y= 1206.9x− 518.14,r= 0.7436,P= 0.0216), and the polymorphism information content (y= 1021.3x− 331.31,r= 0.8245,P= 0.0063) as determined by a correlative test. The findings obtained from the study will be important for future considerations ofM. amblycephalastock improvement programs.
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使用基于微卫星的谱系估计钝口鳊（团头鲂）生长相关性状的遗传参数
影响因子：
2
作者：
Luo, Wei;Zeng, Cong;Gao, Zexia
通讯作者：
Gao, Zexia
影响因子：
6.9
作者：
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通讯作者：
R. Yadav;D. Sehgal;V. Vadez
DOI：
--
发表时间：
1975
期刊：
Acta Hydrobiologica Sinica
影响因子：
--
作者：
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通讯作者：
H. Ko
影响因子：
2.4
作者：
A. Mallet;L. E. Haley
通讯作者：
A. Mallet;L. E. Haley
影响因子：
2
作者：
K. Overturf
通讯作者：
K. Overturf