中国水产科学2016，Vol.23Issue(4)：871-881,11.DOI:10.3724/SP.J.1118.2016.15462
星突江鲽和石鲽正反杂交种的形态变异分析
Morphological variations analysis of reciprocal hybrids from Platich-thys stellatus andKareius bicoloratus
摘要
Abstract
Morphological variations inPlatichthys stellatus,Kareius bicoloratus, and their reciprocal hybrids were measured and analyzed. The results showed that the ratios of left eye type in the obverse hybrid (P. stellatus♀×K. bicoloratus♂) and inverse hybrid (K. bicoloratus♀×P. stellatus♂) were 66.9% and 57.3%, respectively, which was between that ofP. stellatus(84.7%) and K. bicoloratus(0). The scales on the reciprocal hybrids were distributed similarly to those onP. stellatusand on the equivalent body positions where bony plates occurred onK. bicolora-tus. The reciprocal hybrids had dorsal, anal, and caudal finstripes similar to those ofP. stellatus, but they were smaller and more lightly colored. The lateral lines of the obverse hybrid andP. stellatusbent at the end of the pectoral fin, whereas the lateral lines of the inverse hybrid andK. bicoloratus were approximately linear. The av-erage hybrid meristic character index values of the two hybrids were 20.73 and 20.76, indicating that their meristic characters tended to be more similar to those of their female parents, as shown by the chi-square analysis. Among 11 metric character ratios, most of the metric characters were not different (P>0.05) between the hybrids and their female parents, and the average hybrid index values of the two hybrids were 27.16 and 26.47, indicating that their metric characters tended to be more similar to those of their female parents, as shown by the cluster analysis. Four discriminant functions were established in the discriminatory analysis. Average discriminant accuracy was 97.50%, indicating that the discriminant effect was ideal. Four principal components were constructed by factor loadings in the principal component analysis, and the cumulative contributing proportion was 82.562%. Scatter plots showed that the morphological differences between the two hybrids were independent of P. stellatus and K. bicoloratus. Therefore, a multivariate analysis of meristic and metric characters could be useful to identify and distinguish the morphological variations among P. stellatus, K. bicoloratus, and their reciprocal hybrids. These results indicate that the reciprocal hybrids between P. stellatus and K. bicoloratus resembled P. stellatus in eye position and scale and fin morphological characteristics and resembled their female parents in the lateral line and meristic and metric characters. The results will help discriminate the morphological characters and determine the genetic relationships between P. stellatus, K. bicoloratus, and their reciprocal hybrids and allow for breeding excellent hybrids.关键词
星突江鲽/石鲽/杂交种/形态变异Key words
Platichthys stellatus/Kareius bicoloratus/hybrid/morphological variation分类
农业科技引用本文复制引用
曹栋正,陈四清,严俊丽,刘长琳,王志军,燕敬平..星突江鲽和石鲽正反杂交种的形态变异分析[J].中国水产科学,2016,23(4):871-881,11.基金项目
山东省自主创新成果转化专项(2013ZHZX2A0803) （2013ZHZX2A0803）
鳌山科技创新计划(2015ASKJ02-03) （2015ASKJ02-03）
