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All Journal Animal Production : Indonesian Journal of Animal Production
ATA Sudewo, ATA
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Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Environmental Science Veterinary

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Inbreeding and Genetic Trend of Dairy Cattle in Baturraden Dairy Cattle Breeding Centre: A Short Communication Susanto, A; Santosa, SA; Sudewo, ATA
ANIMAL PRODUCTION Vol 12, No 3 (2010): September
Publisher : Universitas Jenderal Soedirman, Faculty of Animal Science, Purwokerto-Indonesia

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Abstract

The success (or failure) of a breeding centre can be assessed through the genetic trend of trait(s) included in the breeding objective and the inbreeding trend.  Through continuous genetic evaluation and structured mating program, positive genetic trend while maintaining inbreeding on the reasonable level will be achieved.  Inbreeding level of a population is an important aspect in animal breeding as this may lead to a deteriorating phenomenon called inbreeding depression.  This information will guide the animal breeder on how the mating system of their animals will be designed.  Inbreeding level of a dairy cow population generally is maintained to be less than 10%.  The trend of additive genetic (breeding value) and inbreeding of dairy cattle population in Baturraden Dairy Cattle Breeding Centre (Balai Besar Pembibitan Ternak Unggul Sapi Perah, BBPTU) was examined.  The pedigree data consisted of 450 animals and 861 records were analyzed.  The study included two traits namely milk yield (MY) and calving interval (CI).  The pedigree data were collected from 1977 to 1990. The breeding value (EBV) of animals was estimated using DMU computer package applying repeatability animal model and the coefficient of inbreeding was computed with SECATEURS.  The study showed zero inbreeding level of the population based on the pedigree available without any single inbred animal.  The population showed no genetic progress over years during the period of 1977-1990 based on linear regression of EBVs on the year of birth.  This indicated that during the period of 1977 and 1990 the genetic improvement program in BBPTU was unsuccessful.  The inbreeding level of zero could mean that the designed mating system was successful.  However, no genetic progress and no inbreeding trend could mean that no selection program has been introduced in the breeding centre. (Animal Production 12(3): 144-149 (2010)Key Words: genetic trend, inbreeding trend, BBPTU Baturraden, dairy cattle
Increasing Productivity of Egg Production through Individual Selection on Tegal Ducks (Anas javanicus) Ismoyowati, Ismoyowati; Suswoyo, I; Sudewo, ATA; Santosa, SA
ANIMAL PRODUCTION Vol 11, No 3 (2009): September
Publisher : Universitas Jenderal Soedirman, Faculty of Animal Science, Purwokerto-Indonesia

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The purpose of this research was to study the effect of egg production selection characteristic on productivity of Tegal duck.  Materials used were 112 of six month old Tegal ducks consisted of 16 males and 96 females.  Selection for females was applied on 12 duck groups based on egg production phenotipic: parent stock duck (G1) which was offspring of their ancestor (G0) having egg production above average production (not less than 78 eggs in 120 days); while the males were selected based on egg production of their mother, and 4 groups were  use as control.  Production and reproduction data were analysed descriptively compared to initial population using T test.  Egg production was analysed based on Nested Classification to estimate haritability value (h2).  The results indicated that egg production increased from 78.00±19.00 (G0) to 88.12±11.57 (G1).  Heritability estimation on egg production and genetic progress were 0.35 and 5.95 respectively.  On the male, the selection increased body weight and semen quality.  It was concluded that selection of egg production characteristics increased productivity of  Tegal duck. (Animal Production 11(3): 183-188 (2009) Key Words : selection, heritability, body statistic, egg production, Tegal duck
Response, Effectiveness and Accuracy of Different Selection Methods and Intensities In Dairy Cattle Santosa, SA; Sudewo, ATA; Susanto, A; Iswoyo, Iswoyo
ANIMAL PRODUCTION Vol 11, No 1 (2009): January
Publisher : Universitas Jenderal Soedirman, Faculty of Animal Science, Purwokerto-Indonesia

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A data set of dairy cattle production and reproduction taken from Baturraden Dairy Cattle Breeding Centre (Balai Besar Pembibitan Ternak Unggul; BBPTU) was used in the study.  The data included were 180 records of milk production collected from first, second and third lactation.  The  objectives of the study were : (1) to estimate heritability and repeatability of the milk production, (2) to compute accuracy, response and effectiveness of individual selection on different selection methods and intensities, (3) to study the best lactation period for selection in dairy cattle. Some conclusion can be drawn: (1) the estimated repeatability of milk production was considered low, the opposite was true for heritability estimate, (2) the selection response and its effectiveness increased when the number of animals maintained in the population decreased, (3) the selection accuracy increased along with the increased of number of record included, (4) the highest selection accuracy was obtained from individual selection with three records whilst the family selection resulted in the lowest selection accuracy.  It was also concluded that selection in dairy cattle can be done as early as the first lactation and the accuracy will be increased if combined with the information from relatives. (Animal Production 11(1): 66-70 (2009) Key Words:  dairy cattle, effectiveness selection method
Reproductive Performance and Preweaning Mortality of Peranakan Etawah Goat under a Production System of Goat Farming Group in Gumelar Banyumas Sodiq, A; Sudewo, ATA
ANIMAL PRODUCTION Vol 10, No 2 (2008): May
Publisher : Universitas Jenderal Soedirman, Faculty of Animal Science, Purwokerto-Indonesia

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Abstract

Program pengembangan dan perbaikan sistim produksi peternakan dapat diawali dengan penilaian terhadap potensi suatu bangsa ternak melalui serangkaian proses pencatatan, evaluasi on-farm, dan monitoring. Tujuan kajian ini adalah (1) mengetahui penampilan reproduksi dan kematian cempe prasapih Kambing Peranakan Etawah pada sistim produksi di kelompok tani ternak kambing Gumelar Banyumas, dan (2) mengetahui faktor-faktor non-genetik yang berpengaruh terhadap penampilan reproduksi dan kematian cempe prasapih.  Digunakan kompilasi data penampilan reproduksi dan kematian cempe prasapih hasil penelitian lapang melibatkan 562 cempe dan 344 ekor induk kambing. Uji Chi-Square dan prosedur General Linear Model (GLM) diterapkan untuk menguji faktor-fator non-genetik (jenis kelamin, tipe kelahiran, paritas) yang berpengaruh  terhadap jumlah anak sekelahiran, kematian cempe prasapih, dan jarak beranak. Hasil penelitian menunjukkan rataan kematian cempe prasapih sebesar 5,9%. Kematian cempe prasapih betina (6,3%) nyata lebih tinggi  daripada jantan (5,4%). Kejadian kematian cempe prasapih paling sering dijumpai pada kelahiran kembar tiga (16,7%), sedangkan pada kelahiran kembar dua dan tunggal masing-masing sebesar 5,6% dan  2,9%.  Kematian cempe prasapih dipengaruhi oleh paritas induk, dan kecenderungan menurun dengan peningkatan paritas.  Rataan jumlah anak sekelahiran sebesar 1,64 ekor, dan dipengaruhi sangat nyata oleh paritas induk. Induk pada paritas 1, 2, 3, 4, 5, 6, dan 7 menghasilkan jumlah anak sekelahiran berturut-turut 1,45; 1,71; 1,73; 1.95; 1,76; 1,83; dan 2,13 ekor.  Rataan jarak beranak 285 hari dan nyata dipengaruhi oleh faktor paritas induk dan tipe kelahiran.  Jarak beranak nyata lebih pendek dengan peningkatan paritas induk (1-7) berturut-turut adalah 319, 271, 261, 234, 236, 230, dan 228 hari. Jarak beranak nyata dipengaruhi oleh tipe kelahiran,  pada kelahiran tunggal rataan jarak beranak (308 hari) nyata lebih pendek dibandingkan pada kelahiran kembar dua (272 hari) dan kembar tiga (245 hari).  (Animal Production 10(2): 67-72 (2008) Kata Kunci: Kambing Peranakan Etawah, jumlah anak sekelahiran, mortalitas cempe prasapih, jarak beranak,sistem produksi peternakan
Co-Authors A Sodiq A Susanto I Suswoyo, I Ismoyowati Iswoyo Iswoyo SA Santosa, SA