标题:
乌苏里拟鲿与黄颡鱼杂交效果的研究Study on the Heterosis between Pseudobagrus ussuriensis and Pelteobagrus fulvidraco
作者:
史文竞, 陈弈帆, 朱传坤, 余祥胜, 王辉
关键字:
乌苏里拟鲿, 黄颡鱼, 平均杂交优势, 超亲杂交优势, 双列杂交, 遗传分析模Pseudobagrus ussuriensis, Pelteobagrus fulvidraco, Average Heterosis, Super Parent Heterosis, Diallel Cross, Genetic Analysis Model
期刊名称:
《Open Journal of Fisheries Research》, Vol.3 No.4, 2016-12-15
摘要:
本文以乌苏里拟鲿(Pseudobagrus ussuriensis)与黄颡鱼(Pelteobagrus fulvidraco)为亲本，采用完全双列杂交方法建立了乌苏里拟鲿、黄颡鱼种内互交组合、乌苏里拟鲿♂ × 黄颡鱼♀、黄颡鱼♂ × 乌苏里拟鲿♀四个试验组合，以考察是否存在杂种优势。基于加–显性遗传分析模型分别计算了60 d、400 d、700 d时存活率、体重、特定生长率以及肥满度的正交及反交杂种优势率。结果表明，两个种间的杂交不同性状在不同时间存在程度不同的杂种优势率，其中乌♂ × 黄♀存活率的平均优势率、超亲优势率均为最高，分别为17.03 (±2.21)%和10.85 (±2.11)%；在体重方面，黄♂ × 乌♀组合的平均优势率最高为24.11 (±2.01)%，乌♂ × 黄♀体重的超亲优势率最高为18.36 (±2.15)%； 肥满度的平均优势率与超亲优势率变化不显著；平均优势率与超亲优势率都随时间逐渐降低。本研究结果可为养殖生长提供参考。
To examine the presence of heterosis between Pseudobagrus ussuriensis and Pelteobagrus fulvidraco, four mating combinations were established using complete diallel cross: P. Ussuriensis × P. ussuriensis, P. fulvidraco × P. fulvidraco, P. ussuriensis ♂ × P. fulvidraco ♀ and P. fulvidraco ♂ × P. ussuriensis ♀. The heterosis of forward and backward crosses for survival, body weight, specific growth rate and condition factor at 60 d, 400 d and 700 d was analyzed based upon the additive- dominance genetic model. Results showed that there existed heterosis to a varying degree for the traits examined at different temporal points. The average heterosis and over-better-parent heterosis of survival for the combination P. ussuriensis ♂ × P. fulvidraco ♀ were highest, 17.03 (2.21)% and 10.85 (2.11)%, respectively; the heterosis of body weight for the combination P. fulvidraco♂ × P. ussuriensis ♀ was highest, 24.11 (2.01)% and the over-better-parent heterosis of body weight for the combination P. ussuriensis ♂ × P. fulvidraco ♀ was highest, 18.36 (2.15)%; the heterosis of condition factor did not vary significantly; both average heterosis and over-better- parent heterosis gradually decreased over time. Results of our study can be favorably relevant to the aquaculture of these species.