Mature wild-type yellow catfish( Pelteobagrus fulvidraco Richardson) individuals with excellent traits have been screened from the Yangtze River as broodstock to establish the germplasm bank of pure-line yellow catfis...Mature wild-type yellow catfish( Pelteobagrus fulvidraco Richardson) individuals with excellent traits have been screened from the Yangtze River as broodstock to establish the germplasm bank of pure-line yellow catfish by artificial gynogenesis technique and hormonal sex reversal method. Based on pure lines of yellow catfish,super-males and physiological females of yellow catfish were selected by GMT technique,hormonal sex reversal method and test-crossing to establish the germplasm bank of YY physiological females( YY♀). The propagation system of male yellow catfish( XY♂) was established based on the combination of super-males( YY♂) and pure-line female( XX♀) for large-scale production of pure-line yellow catfish males,which effectively overcome the disadvantages in the production of common fingerlings and male fingerlings using low-grade fish with slow growth and small size at the bottom of the fish grader as broodfish,such as progeny germplasm degeneration,loss of growth vigor and reduction of breeding benefits. The technical route of breeding pure-line YY physiological females( YY♀) and YY super-males( YY♂) laid the foundation for large-scale production of environmentally friendly yellow catfish males with pure germplasm and strong stress resistance,and provided an efficient,stable,healthy,environmentally friendly,energy-saving and income-increasing approach for sustainable development of yellow catfish breeding industry.展开更多
采用LRH-A2+HCG+DOM混合催产剂对乌苏里拟鲿及瓦氏黄颡鱼进行催产.采取半干法受精的方式进行乌苏里拟鲿、瓦氏黄颡自交及乌苏里拟鲿(♀)×瓦氏黄颡鱼(♂)组合的人工授精,孵化水温为24℃～27℃,在解剖镜下进行胚胎发育观察,描述胚胎...采用LRH-A2+HCG+DOM混合催产剂对乌苏里拟鲿及瓦氏黄颡鱼进行催产.采取半干法受精的方式进行乌苏里拟鲿、瓦氏黄颡自交及乌苏里拟鲿(♀)×瓦氏黄颡鱼(♂)组合的人工授精,孵化水温为24℃～27℃,在解剖镜下进行胚胎发育观察,描述胚胎发育时序和形态特征.结果获得了23个时期的胚胎发育照片;乌苏里拟鲿、瓦氏黄颡鱼自交受精卵分别经过50 h 9 min、46 h 50 min孵化出膜;杂交鲿受精后28 min胚盘形成,受精后1 h进入卵裂期,4 h 23 min进入囊胚期,11 h 3 min进入原肠胚阶段,受精后16 h 56 min胚孔封闭,当受精38h 53 min后心脏开始出现搏动,受精后49 h 37 min仔鱼开始孵出.杂交鲿F1的胚胎发育时间介于两亲本之间,杂交苗全长偏向母本乌苏里拟鲿.展开更多
基金Supported by Implementation Plan of Subsidy Project for the Reform and Construction of Grassroots Agricultural Technology Extension System
文摘Mature wild-type yellow catfish( Pelteobagrus fulvidraco Richardson) individuals with excellent traits have been screened from the Yangtze River as broodstock to establish the germplasm bank of pure-line yellow catfish by artificial gynogenesis technique and hormonal sex reversal method. Based on pure lines of yellow catfish,super-males and physiological females of yellow catfish were selected by GMT technique,hormonal sex reversal method and test-crossing to establish the germplasm bank of YY physiological females( YY♀). The propagation system of male yellow catfish( XY♂) was established based on the combination of super-males( YY♂) and pure-line female( XX♀) for large-scale production of pure-line yellow catfish males,which effectively overcome the disadvantages in the production of common fingerlings and male fingerlings using low-grade fish with slow growth and small size at the bottom of the fish grader as broodfish,such as progeny germplasm degeneration,loss of growth vigor and reduction of breeding benefits. The technical route of breeding pure-line YY physiological females( YY♀) and YY super-males( YY♂) laid the foundation for large-scale production of environmentally friendly yellow catfish males with pure germplasm and strong stress resistance,and provided an efficient,stable,healthy,environmentally friendly,energy-saving and income-increasing approach for sustainable development of yellow catfish breeding industry.
文摘采用LRH-A2+HCG+DOM混合催产剂对乌苏里拟鲿及瓦氏黄颡鱼进行催产.采取半干法受精的方式进行乌苏里拟鲿、瓦氏黄颡自交及乌苏里拟鲿(♀)×瓦氏黄颡鱼(♂)组合的人工授精,孵化水温为24℃～27℃,在解剖镜下进行胚胎发育观察,描述胚胎发育时序和形态特征.结果获得了23个时期的胚胎发育照片;乌苏里拟鲿、瓦氏黄颡鱼自交受精卵分别经过50 h 9 min、46 h 50 min孵化出膜;杂交鲿受精后28 min胚盘形成,受精后1 h进入卵裂期,4 h 23 min进入囊胚期,11 h 3 min进入原肠胚阶段,受精后16 h 56 min胚孔封闭,当受精38h 53 min后心脏开始出现搏动,受精后49 h 37 min仔鱼开始孵出.杂交鲿F1的胚胎发育时间介于两亲本之间,杂交苗全长偏向母本乌苏里拟鲿.
