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对三倍体湘云鲫和作为对照的二倍体日本白鲫的性指数进行了比较分析。三倍体湘云鲫的卵巢指数、精巢指数、脂肪型“性体”指数都分别低于日本白鲫的卵巢指数、精巢指数及两者的平均值。日本白鲫的卵巢指数是湘云鲫卵巢指数的 2 .85倍 ,日本白鲫的精巢指数是湘云鲫精巢指数的 1.94倍 ,日本白鲫卵巢和精巢的平均指数是湘云鲫脂肪型“性体”指数的 5 .6 0倍。具脂肪型“性体”的湘云鲫生长速度最快 ,其次是雌性湘云鲫 ,最后是雄性湘云鲫。根据性体指数对照 ,说明三倍体湘云鲫的性腺发育受到不同程度的抑制 ,其中脂肪型“性体”中生殖细胞的发育完全被抑制 ;卵巢发育的抑制程度大于精巢 ,其主要抑制效应表现在具有卵黄的卵母细胞的大幅度减少。无论从生殖角度还是生长角度来考虑 ,具有脂肪型“性体”的湘云鲫是最理想的不育三倍体鱼
The sex index of Triploid Japanese crucian carp (Carassius auratus) and diploid Japanese white carp (Carassius auratus) were compared. The ovarian index, testis index and fat “body” index of triploid Xiangyun crucian carp were lower than the ovarian index, testis index and the average of both of the Japanese white carp. The ovarian index of Japanese white crucian carp was 2.85 times that of the oviposition index of the Japanese crucian carp. The testicular index of Japanese white crucian carp was 1.94 times that of the testicle. The average index of ovarian and testis of Japanese white crucian carp was the fat type “ Sex ”index of 5.60 times. Xiangyun crucian carp with fat “body” grows fastest, followed by female Xiangyun crucian carp, and finally with male Xiangyun crucian carp. According to the comparison of the body index, the gonadal development of the triploid Carassius auratus gibeliola was inhibited to varying degrees, of which the development of germ cells in the fat-type “sex body” was completely inhibited; the inhibition of ovary development was greater than that of the testis and its main inhibitory effect The performance of egg-yolk oocytes significantly reduced. Whether from reproductive point of view or growth point of view, with a fat “body” of Carassius auratus is the best sterile triploid fish