The sheep populations were studied with Q-type Hierarchical Clustering Method, and characters of the populations were used to construct the principal component, then, the principal component values were analyzed with ...The sheep populations were studied with Q-type Hierarchical Clustering Method, and characters of the populations were used to construct the principal component, then, the principal component values were analyzed with R-type Hierarchical Clustering Method, which might display the genetic differentiation among populations and conform to the result of the known sheep phylogenetic system in China. Characters of the populations were studied with Q-type Hierarchical Clustering Method. The elevation and average annual rainfall were found to be important characters. The ecology factor is also an important character for the breed classification.展开更多
The milk protein polymorphisms were typed by polyacrylamide gel electrophoresis (PAGE)from 109 Maiwa and 100 Jiulong yaks, and the relationships among milk protein polymorphisms,milking traits and milk protein composi...The milk protein polymorphisms were typed by polyacrylamide gel electrophoresis (PAGE)from 109 Maiwa and 100 Jiulong yaks, and the relationships among milk protein polymorphisms,milking traits and milk protein compositions were studied. The results showed thatβ-CN,κ-CN andα-La were monomorphic,αs1-CN andβ-Lg were polymorphic, the dominantgenes were αs1-CN D and β-Lg E,respectively. The frequencies of αs1-CN D were 0.8073and 0.6000 and β-Lg E were 0.9770 and 0.9700 in two populations respectively.The meanheterozygosities were 0.1021 and 0.1867 in two populations. No significant effects onmilking traits and milk protein compositions were observed except for αs1-CN locus onfat percentage in Jiulong yak.展开更多
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 condit...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 was a possibility of blood relationship between the zebu populations from Tibet and Yunnan.展开更多
基金supported by International Cooperative Item of the Nationa1 Natura1 Science Foundation of China(30310103007).
文摘The sheep populations were studied with Q-type Hierarchical Clustering Method, and characters of the populations were used to construct the principal component, then, the principal component values were analyzed with R-type Hierarchical Clustering Method, which might display the genetic differentiation among populations and conform to the result of the known sheep phylogenetic system in China. Characters of the populations were studied with Q-type Hierarchical Clustering Method. The elevation and average annual rainfall were found to be important characters. The ecology factor is also an important character for the breed classification.
基金supported by the Nationa1 Natura1 Science Foundation of China(39870607).
文摘The milk protein polymorphisms were typed by polyacrylamide gel electrophoresis (PAGE)from 109 Maiwa and 100 Jiulong yaks, and the relationships among milk protein polymorphisms,milking traits and milk protein compositions were studied. The results showed thatβ-CN,κ-CN andα-La were monomorphic,αs1-CN andβ-Lg were polymorphic, the dominantgenes were αs1-CN D and β-Lg E,respectively. The frequencies of αs1-CN D were 0.8073and 0.6000 and β-Lg E were 0.9770 and 0.9700 in two populations respectively.The meanheterozygosities were 0.1021 and 0.1867 in two populations. No significant effects onmilking traits and milk protein compositions were observed except for αs1-CN locus onfat percentage in Jiulong yak.
基金This study was supported by the National Natural Science Foundation of China(39670530)the Key Program of Agricultural Department of China.
文摘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 was a possibility of blood relationship between the zebu populations from Tibet and Yunnan.
