Penelitian ini bertujuan untuk mengidentifikasi produktivitas sapi potong di Kabupaten Pesisir Selatan Provinsi Sumatera Barat dalam menghasilkan bibit sapi potong dan kelayakan daerah tersebut sebagai sumber sapi potong di Provinsi Sumatera Barat. Penelitian ini dilakukan dengan cara sensus dengan alat bantu kuesioner dengan metode Quota sampling digunakan untuk memilih tiga kecamatan yang memiliki populasi tinggi, sedang, dan rendah. Variabel yang diamati dalam penelitian ini adalah identitas peternak dan ternak. Data sekunder dari instansi terkait juga digunakan sebagai pendukung dalam penelitian ini. Perkembangan populasi ternak dianalisis dengan pendekatan teori pemuliabiakan ternak. Rata-rata kenaikan populasi ternak dianalisis menggunakan analisis time series (analisis runtut waktu). Hasil penelitian ini menunjukkan nilai efisiensi reproduksi (ER) sebesar 89,95% dan nilai natural increase (NI) sebesar 29,46% yang menunjukkan bahwa pertambahan populasi sapi tergolong sedang. Hasil penelitian ini juga menunjukkan bahwa secara umum populasi sapi potong di Kabupaten Pesisir Selatan masih cukup memenuhi kebutuhan daerah tersebut namun kekurangan ternak pejantan sebesar 12,32% dan populasi ternak betina melebihi kebutuhan sebesar 21,03% dengan nilai net replacement rate (NRR) jantan sebesar 87,68% dan NRR betina sebesar 121,03%. Secara rata-rata output sapi potong pada semua bangsa untuk sapi afkir jantan adalah sebesar 5,93%, betina sebesar 11,12% , sapi muda jantan sebesar 2,19%, dan sapi muda betina sebesar 1,01% dari total populasi sapi.

Tujuan penelitian ini adalah untuk mengidentifikasi potensi sapi potong di Kecamatan Bayang Kabupaten Pesisir Selatan demi mewujudkan produksi bibit sapi potong unggul. Materi dalam penelitian ini adalah 361 orang peternak sapi potong sebagai responden. Metode yang digunakan adalah sensus dan Stratified Random Sampling. Peubah yang diukur adalah komposisi dan struktur populasi, penampilan reproduksi, natural increase (NI), net replacement rate (NRR) dan Dinamika/Estimasi populasi ternak sapi potong. Analisis data dilakukan dengan pendekatan teori pemuliabiakan ternak dan analisis time series. Hasil yang didapatkan menunjukkan komposisi ternak sapi potong di Kecamatan Bayang Kabupaten Pesisir Selatan terdiri dari sapi Pesisir (50,15%), sapi SimPes (25,80%), Bali (17,06%), sapi SimPO (3,75%), dan Brahman Cross (2,18%). Persentase sapi potong yang keluar yaitu 6,12%, lebih banyak dibandingkan dengan persentase ternak sapi potong yang masuk yaitu 5,10%. Nilai natural increase (NI) ternak sapi mendapatkan presentase sebesar 17,64% yang melihatkan pertambahan populasi sapi potong termasuk kategori sedang. Nilai net replacement rate (NRR) ternak sapi jantan (1311,42 %) dan sapi betina (674,34%). Estimasi populasi sapi potong pada tahun 2017 sebanyak 2093,40 ekor dan tahun 2021 kekurangan sapi potong sebanyak 258,60 ekor dimana rataan terjadinya penurunan populasi pertahun sebanyak 783,92 ekor atau 25,83%. Kesimpulan dari penelitian ini menyatakan bahwa Kecamatan Bayang Kabupaten Pesisir Selatan Provinsi Sumatera Barat dinyatakan layak untuk menjadi daerah pembibitan sapi potong.

. Blood samples were collected from 66 individuals consist of 15 Pesisir cattle, 15 SimPes cattle, 15 SimPO cattle, 15 Bali cattle and 6 PO cattle. DNA was extracted from each blood samples after SDS-proteinase K digestion, and used for PCR-amplification for a region of growth hormone gene (211 bp), and then the PCR products were analyzed for restriction fragment length polymorphism (RFLP) using AluI restriction enzyme. The results showed that GH gene of Pesisir, PO and Bali cattle are monomorphic, which frequencies of L allele was 1.00 and V allele was 0.000 while these LL genotype was 1.000. Frequency of L and V alleles in SimPO and SimPes cattle were 0.634, 0.366 and 0.700, 0.300, respectively. SimPO and SimPes cattle were polymorphic, LL and LV of SimPO cattle was 0.733 and 0.267 as well as SimPes cattle which LL and LV was 0.600 and 0.400, respectively. The correlation between genotype and the performance (body weight and body size) was not significant. The present study indicates that polymorphism of growth hormone gene in AluI site could not yet be used as a molecular marker for body weight and body size of beef cattle.

This study aimed to determine the potential of buffaloes in Ulakan Tapakis sub-district to produce calves and its viability as a source buffaloes. Casus and questionnaire are used in this study in which three sub-district characterized by high, medium and low buffalo population are chosen quota sampling. The observed variables in this study are the identity of the breeder and the buffalo. The development of buffalo population was analyzed using breeding theory approach. The average increase of the population was analyzed using a time series analysis. The results showed that Net Replacement Rate (NRR) value in male and female of 157.31% and 191.27% and the natural increase (NI) value of 23.66% indicating a moderate increase of the population. This study also shows that the population of buffaloes in the region is sufficient to cover its need. Male and female seed potencial of 4.55% and 5.33% of the population. On average the increase population of buffalo from 2011 to 2015 annual of as much as 172.75 head or 16.53%. Estimated population of buffaloes in 2016 and 2020 as in 1675 head and 2183 head eith average increase population as much as 63 head or 3.40%.

This study aims to determine the polymorphism of Prolactin (PRL | XbaI and PRL | DraI) genes in Bayang ducks using the PCR-RFLP (Polymerase Chain Reaction-Restriction Fragment Length Polymorphism) technique and its association with weight of ducks aged 1-10 weeks. This study used 200 Bayang duck blood samples consisting of 102 male ducks (♂) and 98 female ducks (♀). DNA from blood samples was isolated using the Genomic DNA Purifification Kit (Promega) using protocol from the manucfacture. The DNA was then amplified using two primers with F: 5′-AAA TTC CCT CTC ACA GTT ACA-3′ and R: 5′-GAT GCA GAG ACA AGT TTC ACC-3′ and F: 5′-GAATAGAACACTTGACCCTG-3′ and R: 5′-TAGAGGAGGCAAGCATAG-3′ which produces fragments with a length of 416 bp and 566 bp. Restriction with XbaI enzymes that recognized the binding site (5-TT CTAGA-3′) resulted 3 genotypes: homozygote (+/+), heterozygote (+/−) and homozygote (−/−) with frequencies 0.455, 0.495 and 0.050 respectively and with frequency allel (+) 0.702 and frequency allel (−) 0.297. While the results of the restriction with enzyme DraI found three types of genotypes, namely (+/+), (+/−) and (−/−) with frequencies of 0.64, 0.35 and 0.01 respectively with frequency allel (+) 0.82 and allele frequencies (−) 0.18. From the results of the analysis, it was found that there was no relationship between these two diversity and weight ducks of duck.