白鲢不同繁育群体中乳酸脱氢酶(LDH)和酯酶(EST)同工酶个体发生多态性的研究

本文叙述了白鲢两个繁殖群体的精子,成熟卵,10个不同发育阶段的胚胎和胚后期样品中乳酸脱氢酶和酯酶同工酶电泳图谱多态性研究结果。作者把本文描述的同工酶个体发生的群体差异称作“个体发生多态性”;这种多态性对白鲢的发育是非致死性的,因此,应属于一般的群体生化多态性。本文还提到了今后需进一步深入研究的有关问题及其在渔业应用方面的前景。

STUDY ON THE ONTOGENETIC POLYMORPHISM OF LACTATE DEHYDROGENASE AND ESTERASE ISOZYMES IN DIFFERENT BREEDING POPULATIONS OF SILVER CARP (HYPOPHT HALMICHTHYS MOLIT RIX)

The results of polymorphic study on the electrophoretic patterns of laotate dehydrogenase and esterase isozymes in the sperms, mature eggs, ten embryonic and postembryonic samples taken from two breeding populations of silver carp (Hypophthalmicthys molitrix) are given in this paper. On molecular biological basis of the polymorphism, we discuss the regulation of gene expression, the morphogenetic stimulus, and the mode and relative metabolic rate for establishing special cytophysiological functions. In short, the general developmental genetic rule of this fish are the same as other teleost fishes studied previously. We designate these population differences of isozymic ontogenesis as "ontogenetic polymorphism" which is not vital to the development of silver carp, so that it belongs to a kind of common biochemical polymorphism. In this essay, the related problems ought to be further studied and their prospects for fishery use are also mentioned.