Judul: Studi perbandingan penilaian pejantan sapi perah dengan metode "Daughter-Dam Comparison (DDC)" dan metode "Daughter-Herdmate Comparison (DHC)"
Abstrak: Suatu penelitian telah dilakukan untuk membandingkan metode "Daughter-Dam Comparison (DDC) dan metode Daughter-Herdmate Comparison (DHC)" dalam menilai pejantan sapi perah dengan menggunakan 328 ekor sapi perah FH yang diperoleh dari tahun 1969 sampai tahun 1983 di dua perusahaan peternakan sapi perah, yaitu PT. Lembang dan PT Baru Adjak. Pendugaan produksi susu dalam satu laktasi dari setiap ekor sapi perah dilakukan dengan Metode Pencatatan Berselang (Test Interval Method) sesuai dengan tatacara DHIA, dan semuanya dibakukan ke lama laktasi 305 hari, 2 kali pemerahan dan umur setara dewasa.
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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: Lumut Terestrial dan Ganggang Asosiasinya di Kebun Raya Bogor
Abstrak: Bogor Botanical Garden is an ex-situ conservation which may serve as habitat for bryophyte. Terrestrial bryophyte usually grow on various substrates in shaded habitat or open habitat, such as roadside, along ditches, and rivers. One of the bryophytes benefit in ecosystem is to provide microhabitat for algae. This research was carried out to inventory the bryophyte species grow on terrestrial substrate, and to study their diversity and algal association. The bryophyte were collected on various terrestrial substrates (soil, root, and rock). Quadrates of 25 × 25 cm² were used to sample bryophytes along 30 m transect on three blocks which is dominated by plants with different family, i.e. Meliaceae, Myrtaceae, and Lauraceae to study the diversity. Bryophyte were also sampled used sub-quadrates of 2,5 × 2,5 cm² in the quadrate of 25 × 25 cm² to sample algae associated with bryophyte. Forty three species of terrestrial bryophytes were identified, including 33 species of mosses and 10 species of liverworts. The bryophytes diversity was significantly different when compared to different blocks (p < 0,05). The highest diversity of bryophyte was on block Meliaceae which were more intensively shaded than on any other block. The bryophytes composition was different inter block. Fissidens crassinervis var. laxus, Isopterygium bancanum, and Taxiphyllum cf. taxirameum were dominated on three blocks in Bogor Botanical Garden. These three bryophytes species are commonly grow on soil and roots. Thirteen morphospecies of algae were found in association with terrestrial bryophyte, i.e. Cyanophyta, Chrysophyta, and Chlorophyta.
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