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Analysis of the female ratio and natural sexual reversal ratio in cultured half-smooth tongue sole families
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1. Key Laboratory for Sustainable Utilization of Marine Fisheries Resources Certified by the Ministry of Agriculture, Yellow Sea Fisheries Research Institute, Qingdao 266071, China; 2. College of Fisheries and Life Science, ShangHai Ocean University, Shan

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S917

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    Abstract:

    We detected the genetic sex and the occurrence of sex reversal in eight normal families and their male parents in the half-smooth tongue sole ( Günther) using the SSR female-specific marker scaffold 1128_343 and a gonad slice. The proportion of females in eight normal families (28, 30, 38, 39, 40, 44, 57, and 69) ranged from 37.93 to 55.00%. The genetic sex of four of the eight normal families (28, 39, 44, 57) was detected twice, and the proportion of femalesdid not exibit significant difference between two tests (>0.05). We detected both the genetic sex and physiological sex in four of the eight normal families (28, 39, 44, and 57) and in all the male parents. The proportion of physiological females ranged from 18.75%−46.88% among the four families, and was lower than the proportion of genetic females. Our results suggest there are inter-family differences in the proportion of females undergoing sex-reversal. The present study also suggests that a significant number of male parent fishes (28.42%) are neo-males. Our results suggest that sex reversal is a natural phenomenon in the half-smooth tongue sole breeding population. Furthermore, we reveal the pedigrees of different physiological spawner ratio have significant differences. Our observations provide a theoretical basis for developing methods to culturing families that have a high proportion of female larvae.

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梁卓,,陈松林,张静,宋文涛 ,杜民,刘姗姗,胡乔木. 半滑舌鰨养殖群体雌雄比例与自然性逆转率[J]. Jounal of Fishery Sciences of China, 2013,[volume_no](1):44-49

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  • Online: February 07,2013
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