| Summary: | 碩士 === 國立臺灣大學 === 畜產學系 === 85 === Ten Blood protein polymorphism was analysed by means of
electrophoresis fordetecting the gene frequencies of Tf, Ptf1,
Ptf2, Alb, Pa, Hb, CA, PGD and PHI as genetic markers in four-
hundred and six blood sample of Taiwan Yellow cattle, exotic
cattle and their crossing breeds in Taiwan. Their phenotypes,
genetypes and gene frequencies were estimates in order to
analysis the genetic component, genetic variability and genetic
similarity among these 11 populations. The phenotype of
AlbBX was only found in Taiwan Yellow cattle. The gene of HbC
which was found only in Bali cattle by former workers,
has shown its existence in Taiwan Yellow cattle . The frequence
of HbC was 0.161. PGD and PHI were monopholic among these
cattles. The expected mean heterozygosity was estimated
according to the gene frequencies. It was found that the
genetic variance was higher in Taiwan Yellow cattle（0.316）,
and was lower in Hostein（0.096）. The genetic distance
between populations was estimated according to Nei(1978) method.
The cluster analysis was carried out by the group average
genetic distance. The results revealed that these 11 populations
can be divided into two groups. One is including Taiwan Yellow
cattle, Kinmen Yellow cattle, and their hybrids, Brahman,
Brahman-Yellow cattle hybrids . The other group can be further
devided into two sub-group. One sub-group is including
Hostein from National Taiwan University, Hostein from Taiwan
Livestock Research Institute and Hostein-Jersey hybrids. The
other sub-group is composed of Santa Gertrudis, Santa-Yellow
cattle hybrids, and Wagyu-Yellow cattle hybrids.
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