A Study of Ecological and Morphological Characters on Tibet Zebu as a New Genetic Resource

<正> Arpijaza,Lekezhi and Zhangmu cattle discovered in cooled region of Tibet are Bos populations which have close blood relationship with zebu. Besides studying their distribution, nature environment and ecological conditions, the multivariate statistics analysis of three sides (i. e. , body measurement, morphology and ecology characters) were carried out on three zebu populations from cooled region of Tibet and other three reference populations. The results indicated that there were various ecology types within Tibet zebu populations. Fore two character values were selected as the principal components (occupied 88.15% of total information amount). The cluster analysis according to two principal component values of each sample displayed that three zebu populations from Tibet and two zebu populations from Yunnan emerged in clustering figure alternately, Lhasa yellow cattle was independent from the five zebu populations. The study has proved that there were zebu populations in Tibet cooled region and there wa