Judul: Pendugaan Nilai Nilai Pemuliaan Sifat Produksi Susu pada Pejantan Sapi Friesian Holstein Di BBPTU Sapi Perah Baturraden Purwokerto.
Abstrak: A bull can not produce milk, therefore it was necessary to estimate its milk genetic ability. Progent test can be done to evaluate milk transmitting ability of bulls on the base of milk yields of their daughters. Contemporary Comparison (CC) method is one method that can be used to estimate breeding values of sires in the progeny test. This research was aimed to estimate breeding values of milk transmitting ability of Holstein Friesian (HF) Sires based on the progeny test in BBPTU-SP Baturraden, Purwokerto. A total number of 176 records of first (1st) lactation milk yields from the daughthers of 83 sires were collected in during a period of 2005-2010. Data of milk yield per lactation was calculated by summing daily milk yield during a certain lactation period. Those that were standardized to 305 days of lactation and to mature eqivalent by Dairy Herd Improvement Association-United State Department of America (DHIA-USDA) in order to estimate heritability (h2) and breeding values of milk yield. Heritability value was estimated by paternal half sib correlation method, while breeding values of sires were estimated by the CC method. The average of 1st lactation milk yields was 3.922 kg/lactation. The averages of th 1st milk yields by the years from 2006 to 2011 were succesively 4,595, 3,765, 3,760, 2,928, 3,266, and 2.527 kg/lactation. The h2 value for the 1st lactation milk yields was 0.30±0.40. The results of estimating breeding values of milk of sires showed that from the 83 heads of sires evaluated resulted positive breeding values by 97,59% and negative breeding values by 2,41%. By considering the sires at the best 5% ranks were those with the breeding values of 164.24-219.86.
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Judul: Potensi Genetik Produksi Susu Sapi Friesian Holstein Betina di BBPTU-Sapi Perah Baturraden, Purwokerto
Abstrak: Genetic ability improvement effort of dairy cattle’s milk production can be done by selection of the cow. Friesian Holstein is the most popular dairy cow to be used. Inheritance ability and estimation of production traits can be evaluated according to the milk yield record. The objectives of this research were to estimated the genetic ability of the dairy cow in BBPTU-SP Baturraden by using two methods and to test rank of genetic superiority. Daily milk production collected 537 records of 213 dairy cows. Data collected from 2006 to 2011 which originated from BBPTU-SP Baturraden, Purwokerto. The daily milk production was rearranged into milk yield per lactation. The real milk yield was standardized to 305 days and mature equivalent based on DHIA-USDA’s correction factors. Repeatibility estimation was done by one way classification with unequal numbers of measurements per individual (unbalanced design). Meanwhile heritability estimation was done by using anysis of variance the interclass correlation between paternal halfsib. The methods were used to estimated the genetic ability, namely Most Probable Producing Ability (MPPA) and Predicted Breeding Value (PBV). Repeatibility and heritability value of milk production are recorded as 0.84±0.02 and 0,40±0,36. Based on the evaluation on 213 heads of HF cows, it was obtained that the average value of MPPA was 5,443±895 kg (3151-7701 kg) and that for PBV was 5,462±425 kg (4375-6533 kg). The best cow was identified for the ID 125 having the MPPA value by 7,701 kg and the PBV value by 6,533 kg.
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Judul: Closed Knight’s Tour pada Papan Catur Berbentuk Persegi Panjang dengan Ukuran Maksimal 8 × 8
Abstrak: Closed Knight’s Tour merupakan langkah kuda yang mengunjungi setiap kotak pada papan catur tepat satu kali dengan langkah kuda berawal dan berakhir pada kotak yang sama. Graf yang terbentuk dari closed knight’s tour dinotasikan sebagai graf G(m,n), dengan m adalah banyaknya baris dan n adalah banyaknya kolom. Graf tersebut memuat Hamiltonian cycle. Sebuah graf terhubung G adalah graf bipartite jika dan hanya jika graf tersebut tidak memiliki cycle dengan panjang ganjil. Papan catur yang memenuhi syarat cukup untuk memiliki closed knight’s tour adalah papan catur berukuran 5 × 6, 5 × 8, 6 × 6, 6 × 7, 6 × 8, 7 × 8, dan 8 × 8.
Keyword: bipartite, closed knight’s tour, hamiltonian cycle, knight’s tour, teori graf