DUA DEKADE SAPI LIMOUSIN DI INDONESIA: PERKEMBANGAN ESTIMASI NILAI PEMULIAAN PEJANTAN DAN INFORMASI GENOTIP TERKINI PEJANTAN SAPI LIMOUSIN DI BBIB SINGOSARI

Koko Wisnu Prihatin

Koko Wisnu Prihatin Balai Besar Inseminasi Buatan Singosari, Malang, Indonesia

Keywords: Limousin, EBV, Mstn F94L

Abstract

Limousin merupakan rumpun sapi unggul yang diintroduksi pada tahun 2001 untuk produksi semen beku dan inseminasi buatan di Indonesia. Semen beku limousin telah diinseminasikan selama dua dekade, sehingga perlu dilakukan evaluasi terhadap kualitas genetik pejantan untuk memastikan respon seleksi yang cukup baik. Evaluasi genetik dilakukan melalui Estimasi Nilai Pemuliaan (EBV) per pejantan yang diimpor pada periode 2001-2002 (31 ekor), 2009-2010 (56 ekor), dan 2017-2018 (43 ekor). Analisis statistik dilakukan melalui Sidik Ragam Satu Arah dengan koreksi Brown-Forsythe terhadap EBV sifat berat Lahir (BL), berat umur 200 hari (BS), berat umur 400 hari (BT1), berat umur 600 hari (BT2) serta berat karkas (BK) pejantan-pejantan pada pengadaan tahun 2001-2002 (P0), 2009-2010 (P1), dan 2017-2018 (P2) yang dilanjutkan dengan uji Games-Howell jika terdapat perbedaan nyata nilai EBV antar periode. Selain itu hasil genotyping mutasi Myostatin (Mstn) F94L juga disampaikan pada kajian ini. Hasil analisis menunjukkan terdapat peningkatan yang sangat nyata (P<0,01) pada parameter sifat berat umur 200 hari (BS), berat umur 400 hari (BT1), berat umur 600 hari (BT2) dan berat karkas (BK) pejantan sapi limousin periode 2017-2018 terhadap periode 2001-2002 dan 2009-2010. Namun, tidak terdapat perbedaan pada sifat berat lahir (BL) antar periode. Hasil genotyping pada pejantan sapi limousin BBIB Singosari menunjukkan komposisi kelompok genotipe homozigot mutasi Mstn F94L (AA) sebesar 90,28 % (65 ekor) berbanding 9,72% (7 ekor) kelompok genotipe heterozigot mutasi Mstn F94L (AC) dan 0 % (0 ekor) kelompok genotipe wild type (CC). Kajian ini menunjukkan BBIB Singosari sebagai penyedia semen beku telah menjalankan peran yang cukup baik dalam usaha meningkatkan produktifitas ternak potong di Indonesia.

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