Characteristics of diploid and triploid hybrids derived from female Megalobrama amblycephala Yih x male Xenocypris davidi Bleeker
Characteristics of diploid and triploid hybrids derived from female Megalobrama amblycephala Yih x male Xenocypris davidi Bleeker
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DOI：
10.1016/j.aquaculture.2012.08.025
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发表时间：
2012-10-05
期刊：
影响因子：
4.5
通讯作者：
Liu, Yun
中科院分区：
文献类型：
--
作者：
Hu, Jie;Liu, Shaojun;Liu, Yun
对团头巨蟹(Megalobrama amblycephala Ih(BSB)雌性)与大白鲨(Xencypris Davidi Bleeker(YT))(雄性)杂交后代的DNA含量、染色体数目、形态特征、养殖性能和性腺发育进行了分析。在杂交后代中发现了48条染色体的二倍体杂种(2nBY，2n=48)和72条染色体的三倍体杂种(3nBY，3n=72)，分别占88%和12%。两种杂交种表现出BSB和YF的表型分化和杂种优势。杂交种通过出现的肛鳍射线的数量来鉴定。两个杂交种的体高，尤其是3nBY的体高显著高于YT(P
DNA content, chromosomal number, morphological characters, aquaculture performance, and gonad development of Megalobrama amblycephala Yih (BSB) (female) x Xenocypris davidi Bleeker (YT) (male) hybrids were analyzed. Diploid hybrids with 48 chromosomes (2nBY, 2n = 48) and triploid hybrids with 72 chromosomes (3nBY, 3n = 72) were found in the hybrid progeny, accounting for 88% and 12%, respectively. The two kinds of hybrids exhibited phenotypic divergence and hybrid heterosis from BSB and YF. Hybrids were identified by the number of anal fin rays present. Body height of the two hybrids, especially that of 3nBY, was significantly greater than that of YT (P