Judul: Identifikasi Keragaman Gen Insulin-Like Growth Factor- I Receptor (IGF-IR|AluI) pada Ayam Lokal dengan Metode PCR-RFLP.
Abstrak: Gen Insulin-Like Growth Factor-I Receptor (IGF-IR) adalah gen yang berperan penting dalam pertumbuhan, sifat karkas, dan kualitas daging terutama pada ayam. Penelitian ini bertujuan untuk mengidentifikasi keragaman gen IGFIR dengan menggunakan enzim retriksi AluI melalui metode PCR-RFLP pada beberapa ayam lokal indonesia. Sampel yang digunakan pada penelitian ini sebanyak 198 ekor ayam lokal indonesia, yang terdiri atas 69 ekor ayam kampung ciawi, 56 ekor ayam kampung sukabumi, 25 ekor ayam merawang, 23 ekor ayam pelung, dan 25 ekor ayam sentul. Panjang produk hasil PCR adalah 351 bp. Hasil genotyping menghasilkan 2 genotipe, yaitu AG (351 pb, 92 pb, dan 259 pb), dan GG (92 pb dan 259 pb). Frekuensi genotip AG (0.556) memiliki nilai yang paling tinggi dibandingkan dengan genotip GG (0.444). Sehingga frekuensi alel G (0.72) lebih tinggi dibandingkan frekuensi alel A (0.28). Populasi ayam kampung sukabumi dan ayam kampung ciawi berada pada keadaan keseimbangan Hardy- Weinberg. Nilai heterozigositas pengamatannya lebih tinggi dari pada nilai heterozigositas harapan (Ho>He). Disimpulkan bahwa gen IGF-IR pada ayam lokal Indonesia bersifat polimorfik.
Keyword: ayam lokal Indonesia, Gen IGF-IR, PCR-RFLP, polimorfik

Judul: Identifikasi Keragaman Gen Insulin-Like Growth Factor I (IGF-1) Pada Ayam Lokal Dan Ras Pedaging Dengan Metode PCR-RFLP.
Abstrak: Identification of gene diversity is closely related on production levels. One of the genes that suspected to have an influence on the nature of growth is the insulin-like growth Factor I (IGF-1). Restriction fragment length polymorphisms and polymerase chain reaction allows the identification of genetic diversity directly at the DNA level. This study aims to identify the diversity of IGF-1 and find out the variation of genes at several native chicken and broiler. Total number of samples were 100 heads from are native chicken and broiler chicken. Native chicken that consists of four types : 15 kampoeng chickens, 16 kedu chickens, 15 sentul chickens and 15 pelung chickens, 23 arab chickens, and 16 broiler chickens. Using PCR-RFLP method by Pst1 restriction enzyme. Genotyping the IGF-1 gene resulted in two alleles, namely A and B, with three genotypes, namely AA, AB dan BB. The average frequency of the A allele followed by native chickens and broiler chickens was higher (0.68) than the B allele (0.32). AA genotype had the highedt average frequency (0.56) than the AB genotype (0.40) and the BB genotype (0.04). Chi-Square analysis showed that kampoeng chickens, kedu chickens, sentul chickens, pelung chickens, and broiler chickens were in Hardy-weinberg (HW) equilibrium (X2 < X2(0.05)), contrast to arab chickens (X2 > X2(0.05)). The sixth type of chicken has a low heterozygosity values. The closest kinship exists between populations kedu chicken and chicken Sentul at 0.395, and the farthest are the populations of broiler chickens and that is equal to 0.979.
Keyword: genetic polymorphism, IGF-I, broiler chicken, native chickens

Judul: Numerical modeling of the hydrodynamics of standing wave and scouring in front of impermeable breakwater with different steepnesses
Abstrak: The aim of this paper is to numerically study the effects of breakwater steepness on the hydrodynamics of standing wave and scouring process in front of impermeable breakwaters. A two-dimensional hydrodynamics model based on the Reynolds Averaged Navier–Stokes (RANS) equations and the Volume of Fluid (VOF) method was developed and then combined with an empirical sediment transport model. Comparisons with an analytical solution and experimental data showed the present model is very accurate in predicting the near bottom velocity and capable of simulating the scour/deposition patterns consistent with experimental data. It was found that the additional terms of bottom shear stress in the momentum equations are necessary to produce a physical scouring pattern. Different breakwater steepnesses produce different characteristics of standing wave, the steady streaming system, and scouring pattern in front of the breakwaters, which also affects the correlations between them. An additional analysis of the turbulence field parameters and the sediment transport rate was also performed. All these important information will be presented in details in this paper and can be worthwhile for designing the breakwater in coastal areas.
Keyword: The RANS–VOF model Standingwave Steadystreamingsystem Scouring pattern Breakwatersteepness