The Effect Analysis On Original Variety Selective Breeding Of Tibetan Cashmere Goats

The cashmere wool has being known as “soft Gold”, and Cashmere goat has being treated as aprecious breed. Cashmere goat widely distributed in the area of north-west Tibet, and the woolparticularly from Ritor and Niyma counties presented better wool productive ability along with thesuperior quality which was demonstrated by the average fiber diameter of14micron. However, thethicker fiber diameter and decreasing in wool quality were indicated recently as the result of somefactors. Therefore, the aim of this study is to preserve this superior local breed, dig out the producingpotential as well as improve the entire wool quality by comparing the methods of homogeneous andheterogeneous selective breeding.The result of this study showed that there were significant improvements in reproductiveperformance, body size, liveweight, and wool yield and quality for the offspring of selective breeding ascompared to the previous generation. The result shown:1. Using the artificial insemination technology did significantly improve the reproductiveperformance of Cashmere goat at the high altitude area. In addition, within the same breed but differentherd and gender, the birth weight and weaning weight of the core group were greater than the generalgroup, and which were also greater for male lamb as compared to the female.2. The introducing of ram with better reproductive performance improved the body size andliveweight of the offspring relatively.3. At Niyma, the cashmere wool yield were202.33g,182.81g for the yearly ram and ewe; were289.25g,232.85g for the mature ram and ewe. At Ritor, the cashmere wool yield were244.59g,215.44gfor the yearly ram and ewe, were291.96g、273.26g for the mature ram and ewe. The wool yield ofyearly and mature ram and ewe were increased by18.00%,12.78%,17.47%and11.88%, respectivelyin Ritor. The wool yield of yearly and mature ram and ewe were increased by17.34%、13.59%、15.47%、15.06%, respectively in Niyma. These results indicated that introducing the high performanceram into the group would significantly improve the wool production of the individual offspring.4. The cashmere wool of offspring is maintaining the finest quality since the breed selection, andthe average fiber diameter was less than14micron. The parameters like pure color, fiber diameter,natural length and strength were all completely reached the international standard for the ideal woolproduct.