The estimation of genetic distance and discriminant variables on breed of Indonesian sheep by morphological analysis

The morphological discriminant and canonical analyses were carried out to determine the genetic distance and discriminant variables between Indonesian breeds of thin tail sheep from Deli Serdang (North Sumatra), Ciamis and Garut (West Java) and fat tail sheep from Garahan and Pamekasan (East Java)....

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Bibliographic Details
Published inJurnal Ilmu Ternak dan Veteriner Vol. 4; no. 2
Main Authors Suparyanto, A. (Balai Penelitian Ternak, Bogor (Indonesia)), Purwadaria, T, Subandriyo
Format Journal Article
LanguageEnglish
Published 1999
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Summary:The morphological discriminant and canonical analyses were carried out to determine the genetic distance and discriminant variables between Indonesian breeds of thin tail sheep from Deli Serdang (North Sumatra), Ciamis and Garut (West Java) and fat tail sheep from Garahan and Pamekasan (East Java). The number of sheep randomly collected farmers was 665 heads, while that from breeding station was 183 heads. Zoometrical variables studied were body weight, body length, wither height, chest depth, chest circumference, hip height, hip depth, hip circumference, tail length, tail width and tail thickness. SAS package program was used to analyze the data. Results from distribution mapping produced by canonical analysis and Mahalanobis distance (phenogram tree) showed that breeds are divided into two groups. The first group is thin tail sheep which consists of Ciamis, Garut and Sumatra, and the other is fat tail sheep which consists of Garahan and Pamekasan. The groups of Ciamis and Garut were mixed by Garahan with 1.01 and 1.20 percent, respectively but were not contaminated by Pamekasan (0.00 percent). The highest similarity between individual inside the group was obtained from Sumatra (84.27 percent) due to the isolated flock. It was mixed more by Ciamis (7.87 percent) and Garut (5.62 percent) than Garahan (1.69 percent) and Pamekasan (0.50 percent). Results from canonical analysis also showed that body length, chest circumference, hip circumference, and body weight was less discriminant variables to determine the differences between breeds, while the most discriminant variables were obtained by tail length, tail width and tail thickness Analisis morfologi dengan pendekatan teknik diskriminan dan canonical digunakan untuk menduga jarak genetik dan peubah pembeda antar bangsa dan kelompok domba di Indonesia yaitu Domba Ekor Tipis (DET) yang berasal dari Deli Serdang (Sumatera Utara), Ciamis, Garut (Jawa Barat), dan Domba Ekor Gemuk (DEG) yang berasal dari Garahan dan Pamekasan (Jawa Timur). Jumlah sampel domba yang diamati sebanyak 665 ekor yang diambil dari ternak rakyat dan 183 ekor dari stasiun pembibitan. Peubah ukuran tubuh yang diamati meliputi bobot badan, panjang badan, tinggi pundak, dalam dada, lingkar dada, tinggi pinggul, dalam pinggul, lingkar pinggul, panjang ekor, lebar ekor dan tebal ekor. Data dianalisis dengan menggunakan analisis diskriminan sederhana dengan menggunakan paket program SAS. Hasil yang didapat dari uji jarak Mahalanobis dan peta penyebaran menunjukkan bahwa kelompok domba terdiri atas dua bangsa yang terpisah jelas. Di lain pihak adalah kelompok domba Pamekasan dan Garahan. Kelompok domba Ciamis dan Garut dilihat dari fenotipiknya dipengaruhi oleh adanya campuran dengan kelompok domba Garahan sebesar 1,01 persen dan 1,20 persen, tetapi tidak tercampuri oleh kelompok domba Pamekasan (0,00 persen). Kesamaan ukuran fenotipik terbesar antar individu dalam kelompok terdapat pada domba Sumatera (84,27 persen) yang merupakan kelompok terisolasi. Kelompok ini lebih besar dicampuri oleh domba Ciamis (7,87 persen) dan Garut (5,62 persen) dibandingkan dengan kelompok Garahan (1,69 persen) dan Pamekasan (0,5 persen). Hasil analisis canonical menunjukkan bahwa ukuran fenotipik panjang badan, lingkar dada, lingkar pinggul dan bobot badan kurang dapat digunakan sebagai peubah pembeda bangsa, sedangkan ukuran ekor (panjang, lebar dan tebal) sebagai peubah kuat dalam pembeda kelompok bangsa
Bibliography:L40
L10
2001000149
ISSN:0853-7380