| NIM | D1A022206 |
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| Namamhs | KAUTSAR ABIYYUZEIN RAHMANDITA |
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| Judul Artikel | PENAKSIRAN HERITABILITAS (h2) MORFOMETRIK DOMBA GARUT BETINA DENGAN LINEAR MIXED MODELS MELALUI SAUDARA TIRI SEBAPAK DI UPTD BPPTDK MARGAWATI GARUT |
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| Abstrak (Bhs. Indonesia) | Penelitian ini bertujuan untuk menaksir nilai heritabilitas (h²) karakteristik morfometrik domba Garut betina di UPTD BPPTDK Margawati Garut. Data sekunder berasal dari recording domba betina pascasapih umur 4-21 bulan dengan struktur kekerabatan saudara tiri sebapak. Dataset akhir yang dianalisis memuat 186 catatan keturunan dari 19 pejantan, dengan jumlah anak 5-16 ekor per pejantan. Karakteristik yang dianalisis meliputi tinggi pundak (TP), panjang badan (PB), lingkar dada (LD), dan bobot badan (BB). Tipe kelahiran, musim kelahiran, dan paritas induk dimasukkan sebagai pengaruh tetap, identitas pejantan sebagai pengaruh acak, serta umur sebagai kovariat pada seluruh model. Bobot badan digunakan sebagai kovariat pada model penaksiran h2 TP dan PB. Komponen ragam diestimasi menggunakan Linear Mixed Models dengan metode Restricted Maximum Likelihood. Hasil penelitian diperoleh rataan dan simpang baku TP, PB, LD, dan BB berturut-turut adalah 64,43 ± 3,31 cm; 54,67 ± 3,49 cm; 73,27 ± 4,77 cm; dan 26,62 ± 4,98 kg. Koefisien keragaman (KK) tertinggi diperoleh BB (18,70%), sedangkan karakteristik lainnya berkisar 5,14–6,51%. Estimasi h² BB (0,67 ± 0,31) termasuk kategori tinggi, TP (0,19 ± 0,26) termasuk sedang, sedangkan LD (0,05 ± 0,18) dan PB (0,02 ± 0,17) termasuk rendah. Nilai tersebut menunjukkan potensi BB sebagai kriteria seleksi, dengan interpretasi yang tetap mempertimbangkan ket elitian pendugaannya. |
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| Abtrak (Bhs. Inggris) | This study aimed to estimate the heritability (h²) of morphometric traits in female Garut sheep at UPTD BPPTDK Margawati Garut. Secondary data were obtained from recordings of post-weaning female sheep aged 4–21 months with a paternal half-sib family structure. The final dataset analyzed comprised 186 offspring records from 19 sires, with 5–16 offspring per sire. The traits analyzed were withers height (TP), body length (PB), chest girth (LD), and body weight (BB). Birth type, birth season, and dam parity were included as fixed effects, sire identity as a random effect, and age as a covariate in all models. Body weight was used as a covariate in the h² estimation models for TP and PB. Variance components were estimated using Linear Mixed Models with the Restricted Maximum Likelihood method. The results showed mean values and standard deviations of TP, PB, LD, and BB of 64.43 ± 3.31 cm, 54.67 ± 3.49 cm, 73.27 ± 4.77 cm, and 26.62 ± 4.98 kg, respectively. The highest coefficient of variation (CV) was obtained for BB (18.70%), while the other traits ranged from 5.14–6.51%. The h² estimate for BB (0.67 ± 0.31) was categorized as high, TP (0.19 ± 0.26) as moderate, while LD (0.05 ± 0.18) and PB (0.02 ± 0.17) were categorized as low. These values indicate the potential of BB as a selection criterion, with the interpretation still considering the precision of the estimates. |
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| Kata kunci | bobot badan, domba Garut, heritabilitas, Linear Mixed Models, paternal half-sib |
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| Pembimbing 1 | Prof. Dr. Ir. Hj. Dattadewi Purwantini, M.S., IPU., ASEAN Eng. |
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| Pembimbing 2 | Dr. Ir. Setya Agus Santosa, S.Pt., M.P., IPM. |
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| Pembimbing 3 | |
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| Tahun | 2026 |
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| Jumlah Halaman | 9 |
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| Tgl. Entri | 2026-08-12 10:51:15.545732 |
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