摘要
为探讨三角鲂、翘嘴鲌及其杂交子代的生长性能与形态差异,本研究开展了广东东江三角鲂(MT)与长江水系翘嘴鲌(CA)远缘杂交实验,获得了三角鲂♀×翘嘴鲌♂新型鲂鲌杂交F1优良组合。以团头鲂(MA)♀×翘嘴鲌♂杂交F1、三角鲂、翘嘴鲌、团头鲂自交子代4个群体为对照,比较分析了MT♀×CA♂杂交F1的生长性能及形态差异。结果显示,(1)土池同池生长性能在1龄时,MT♀×CA♂、MA♀×CA♂表现出显著的超父本CA杂种优势;2龄时,MT♀×CA♂、MA♀×CA♂表现出显著的超双亲生长优势;3龄时,MT♀×CA♂不仅具显著的超双亲生长优势,且体质量也显著高于MA♀×CA♂。(2)MT♀×CA♂的可数和可量性状多数表现为中间型。可数性状的分析结果显示,MT♀×CA♂臀鳍等多个性状介于父母本之间,平均杂种指数为65.00,接近中间值,略偏向于父本CA。可量性状表明MT♀×CA♂有7个性状分别与父母本有显著性差异,平均杂种指数为51.61,接近理想的中间值。(3)聚类分析显示鲂鲌杂种MT♀×CA♂和MA♀×CA♂聚为一支,MT和MA聚为一支,然后这两支汇聚后与CA聚为一支。主成分分析得到累计贡献率达56.02%的3个主成分,反映了鱼体高、躯干、头部和尾部的形态变异;通过构建5个群体的判别函数进行判别分析,判别准确率为87.1%~100.0%。研究表明,三角鲂(♀)×翘嘴鲌(♂)F1杂种表现出生长快、形态优等优良性状,有望进一步培育成为优良鲂鲌杂交新品种。
In the present study,a hybrid F1 of Megalobrama terminalis(♀)×Culter alburnus(♂)(MT♀×CA♂)was obtained by intergeneric crossing,based on M.terminalis,from Dongjiang River,and C.alburnus,from Dianshan Lake.Growth performance and morphological characteristics of MT♀×CA♂were compared and analysed further,with M.terminalis(MT),C.alburnus(CA),M.amblycephala(♀)×C.alburnus(♂)F1(MA♀×CA♂)and M.amblycephala(MA)as controls.The results are as follows:(1)at 1-year-old stage,both MT♀×CA♂and MA♀×CA♂grew significantly faster than CA,suggesting a remarkable growth advantage of over-male-parent.At 2-year-old stage,MT♀×CA♂was similar to MA♀×CA♂in growth rate,which grew faster than their parents.At 3-year-old stage,the hybrid MT♀×CA♂had not only marked growth advantage of overdual-parent,but also its body weight exceeded MA♀×CA♂value.(2)Most numeric traits of MT♀×CA♂presented to be medium.Among countable traits,the numbers of soft ray of anal fin and other traits are within the range of its parents,the average hybrid index is calculated to be 65.00,which shows that the countable traits approach the middle values between MT and CA,while slightly incline to its male parent CA.Of measurable traits,seven traits are significantly different from its parents,the average hybrid index is calculated to be 51.61,which indicates the measurable traits are also close to the middle values.(3)The results of cluster analysis revealed that MT♀×CA♂and MA♀×CA♂were much closer,the same to the MT and MA,joined CA again after the two groups clustered.Three principal components with accumulative variance percentage 56.02%were summarized in principal component analysis,reflecting the morphological variations of frame,head and caudal peduncle.Discriminant accuracy was 87.1%–100.0%by established discriminant function of the populations.In summary,the hybrid F1 of MT♀×CA♂showed advantageous characteristics such as fast growth and excellent morphology,and it is expected to further culti
作者
郭洪洪
郑国栋
吴成宾
陈杰
蒋霞云
邹曙明
GUO Honghong;ZHENG Guodong;WU Chengbin;CHEN Jie;JIANG Xiayun;ZOU Shuming(Genetics and Breeding Center for Blunt Snout Bream,Key Laboratory of Freshwater Aquatic Genetic Resources,Ministry of Agriculture,Shanghai Ocean University,Shanghai 201306,China)
出处
《水产学报》
CAS
CSCD
北大核心
2018年第10期1572-1581,共10页
Journal of Fisheries of China
基金
国家自然科学基金(31272633,31201760)
上海高校知识服务平台(ZF1206)
关键词
三角鲂
团头鲂
翘嘴鲌
属间杂交
生长差异
形态特征
Megalobrama terminalis
Culter alburnus
intergeneric crossing
growth advantage
morphological character
