中系长毛兔与西德长毛兔杂交的杂种优势分析

ANALYSIA OF HYBRID VIGOUR OF THE CROSS OF CHINA ANGORA RABBIT AND GERMAN ANGORA RABBIT

以中系长毛兔为母本,西德长毛兔为父本,进行级进杂交试验,两批F_1代母兔的年累计平均产毛量分别为401.85克、486.97克,比我省原来中系毛兔年产毛量180克左右,分别提高了1.23倍和1.70倍,杂种优势率分别为19.64％和20.01％。F_1代母兔在70日龄、100日龄、180日龄和成年时,体重增长的杂种优势率分别为32.57％、27.58％,11.70％和0.62％,随日龄增长而减弱。

The grading cross-experiment was carried out with the China Angora Rabbit as the female parent and the German Angora Rabbit as the male parent. The result proves that: the average amount of the mulative fur production of two batches of the female rabbits of F_1 generation is respectively 401.85g and 486.97g, which has repectively increased by 123% and 170% compared with the annual fur output of about 180g of the former China Angora Rabbits in Sichuan province. The frequency of the hybrid vigour is respectively 19.638% and 20.01%, and the frequency of the heterosis of the gain of the body weight of the female rabbits of F_1 generation at the age of 70 days,of 100 days,of 180 days and in the adult period is respectively32.57%, 27.58%, 11.70% and 0.62%, and also the frequency gradually weakens as the age increases.