HUBUNGAN ANTARA KARAKTERISTIK MORFOLOGI DAN PERFORMANS REPRODUKSI ITIK TEGAL SEBAGAI DASAR SELEKSI [Relationship Between Morphology Characteristics and Reproduction Performance of "Tegal" Duck as Based Selection]

Abstract

ABSTRAK Penelitian ini bertujuan untuk memperoleh data morfologi tubuh atau ukuran bagian-bagian tubuh tertentu dan mengetahui hubungan antara morfologi tubuh dengan performans reproduksi itik Tegal. Materi yang digunakan adalah itik Tegal jantan sebanyak 20 ekor dan itik Tegal betina menjelang bertelur ( umur 20 minggu) sebanyak 100 ekor. Peubah yang diamati meliputi : karakteristik morfologi yaitu bobot badan, lingkar dada, lingkar perut dan lebar pubis; performans reproduksi betina meliputi:produksi telur, bobot telur dan bobot tetas; performans reproduksi jantan meliputi : volume semen, konsentrasi, motilitas dan viabilitas spermatozoa. Metode penelitian yang digunakan eksperimental dengan analisa data analisis korelasi. Hasil penelitian menunjukkan bahwa secara morfologi terdapat korelasi antara ukuran tubuh itik dengan produksi telur. Lebar pubis memiliki hubungan yang sangat erat ( r = 0,693) dibanding dengan ukuran tubuh lainnya. Pada itik jantan terdapat korelasi negatif yang relatif kecil antara bobot badan dengan volume semen ( r = -0,336). Bobot telur berkorelasi positif dengan bobot tetas dan bobot bobot badan anak itik dengan koefisien korelasi bervariasin dari 0,4688 sampai 0,7829. Kata kunci: Morfologi, korelasi, performans reproduksi, itik Tegal, seleksi ABSTRACT The research was conducted to obtain the morphological data and its correlation with the reproduction performances of "Tegal" duck. The research used 20 male and 100 female "Tegal" duck. Variable collected were morphological characteristics : body weight, chest size, abdomen size and pubis width. The reproduction performance of female was observed on egg production, egg weight and duckling weight. The reproduction performance of male duck was observed on semen volume and concentration, motility and viability of spermatozoa. A correlation analysis was used to test the correlation between morphological characteristics and reproduction performance of both male and female ducks. There was a correlation between morphology and body parameters with the egg production. The pubic width had a highest corerelations ( r = 0.693) than the others. In the male duck there was slight negative correlations between body weight with semen volume ( r = -0.336). The egg weight had positive correlations with weight day old duck and weight duckling, with correlation coefficient varied from 0.4688 to 0.7829. Keywords: Morphology, correlations, reproduction performances, "Tegal" duck, selection