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.
The objective of this research was to obtain quantitative growth hormone gene polymorphism association between growth hormone gene genotype with quantitative characteristics of the thin-tail sheep in the highlands and lowlands of Jambi Province. Two phases of research were done on the field and in the laboratory. Field research which was conducted to obtain the quantitative characteristics data includes; withers height (WH), body length (BL), chest grid (ChG), chest depth (ChD), chest width (ChW), body weight (BW) and body weight gain (BWG). Laboratory research included: DNA isolation, amplification and gel purification, characterization and identification using PCR-RFLP with the MspI, and AluI. Quantitative characteristics data was collected from 240 heads of thin-tailed sheep. Blood samples were collected from 160 of them and all were between the ages of 1 and 2 years (I1 = pair of permanent teeth). Field research was conducted in the Kerinci District and Sungai Penuh City (Highlands) and Muara Jambi Districts and Batanghari Districts (lowlands). The purposive sampling technique used in this research revealed that: 1) quantitative characteristics (BW, BWG, BL, ChG, ChD, and ChW) of thin-tailed sheep both male and female in highland were better than in the lowlands; 2) studied locus was polymorphic on the highlands and lowlands; 3) the highest of genotype and allele frequencies of both highlands and lowlands were related to the genotype (+/+) and allele (+), respectively; 4) the highest quantitative characteristic (BW BW, BWG, BL, ChG, ChD, and ChW) of thintailed sheep was genotype (+/+); and 5) the diversity of GH genes MspI and AluI were associated with BW, BWG, BL, ChG, ChD, and ChW of thin-tailed sheep both on the highlands and lowlands of Jambi Province.
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