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All Journal Jurnal Ilmu Ternak Jurnal Ilmu Ternak dan Veteriner JITRO (Jurnal Ilmiah dan Teknologi Peternakan Tropis) Innovation in Research of Informatics (INNOVATICS) Agrivet : Jurnal Ilmu-Ilmu Pertanian dan Peternakan (Journal of Agricultural Sciences and Veteriner) Jurnal Produksi Ternak Terapan (JPTT)
Asep Anang
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Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Computer Science & IT Control & Systems Engineering Electrical & Electronics Engineering Engineering Environmental Science Immunology & microbiology Veterinary

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Journal : Jurnal Ilmu Ternak dan Veteriner

 1 
Fixed Regression Test Day Model as a solution in predicting the genetic value of dairy cattle Indrijani, Heni; Anang, Asep
Indonesian Journal of Animal and Veterinary Sciences Vol 14, No 3 (2009)
Publisher : Indonesian Animal Sciences Society

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (161.973 KB) | DOI: 10.14334/jitv.v14i3.343

Abstract

Genetic evaluation on milk yield production basically based on breeding value. This research was addressed to study milk production curve, for the most appropriate genetic evaluation, and the best methods in estimating genetic parameter and predicting breeding values. Data were collected from PT. Taurus Dairy Farm, consisting of 581 cows having 305 days records in first lactation (P305) and 542 cows having 305 days records in second lactation. Records used for Test Day (TD) evaluation were 5,373 for first lactation, and 4,925 for second lactation. Total records used for Test Day were 10,298. The results indicated that the most suitable curve, being able to be used for genetic evaluation was Ali-Schaeffer with the coefficient of correlation of 0.999, and the most appropriate model for estimation of genetic parameters and prediction of breeding values was fixed regression model with the regression of Ali-Schaeffer by taking account to the covariates. The genetic evaluation can therefore be conducted simultaneously by ignoring lactation levels. Key Words: Test Day, Milk Production Curve, Breeding Value, Dairy Cattle
Analyses of fixed effects for genetic evaluation of dairy cattle using test day records in Indonesia Anang, Asep; Indrijani, Heni; Tasripin, Didin
Indonesian Journal of Animal and Veterinary Sciences Vol 15, No 2 (2010)
Publisher : Indonesian Animal Sciences Society

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (441.933 KB) | DOI: 10.14334/jitv.v15i2.652

Abstract

Season, rainfall, day of rain, temperature, humidity, year and farm are fixed effects, which have been reported to influence milk yield. Those factors are often linked together to contribute to the variation of milk production. This research is addressed to study the fixed effect factors, including lactation curve, which should be considered for genetic evaluation of milk yield based on test day records of dairy cattle. The data were taken from four different farms, which were PT. Taurus Dairy Farm, BPPT Cikole, Bandang Dairy Farm, and BBPTU Baturraden. In total of 16806 test day records were evaluated, consisting of 9,302 at first and 7,504 at second lactation, respectively. The results indicated that fixed effects were very specific and the influences had different patterns for each farm. Consequently, in a genetic evaluation, these factors such as lactation, temperature, year, day of rain, and humidity need to be evaluated first.  Ali-Schaeffer curve represented the most appropriate curve to use in the genetic evaluation of dairy cattle in Indonesia. Key words: Fixed Effects, Milk Production Curve, Test Day, Dairy Cattle
Fixed Regression Test Day Model as a solution in predicting the genetic value of dairy cattle Heni Indrijani; Asep Anang
Jurnal Ilmu Ternak dan Veteriner Vol 14, No 3 (2009): SEPTEMBER 2009
Publisher : Indonesian Center for Animal Research and Development (ICARD)

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (161.973 KB) | DOI: 10.14334/jitv.v14i3.343

Abstract

Genetic evaluation on milk yield production basically based on breeding value. This research was addressed to study milk production curve, for the most appropriate genetic evaluation, and the best methods in estimating genetic parameter and predicting breeding values. Data were collected from PT. Taurus Dairy Farm, consisting of 581 cows having 305 days records in first lactation (P305) and 542 cows having 305 days records in second lactation. Records used for Test Day (TD) evaluation were 5,373 for first lactation, and 4,925 for second lactation. Total records used for Test Day were 10,298. The results indicated that the most suitable curve, being able to be used for genetic evaluation was Ali-Schaeffer with the coefficient of correlation of 0.999, and the most appropriate model for estimation of genetic parameters and prediction of breeding values was fixed regression model with the regression of Ali-Schaeffer by taking account to the covariates. The genetic evaluation can therefore be conducted simultaneously by ignoring lactation levels. Key Words: Test Day, Milk Production Curve, Breeding Value, Dairy Cattle
Analyses of fixed effects for genetic evaluation of dairy cattle using test day records in Indonesia Asep Anang; Heni Indrijani; Didin Tasripin
Jurnal Ilmu Ternak dan Veteriner Vol 15, No 2 (2010): JUNE 2010
Publisher : Indonesian Center for Animal Research and Development (ICARD)

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (441.933 KB) | DOI: 10.14334/jitv.v15i2.652

Abstract

Season, rainfall, day of rain, temperature, humidity, year and farm are fixed effects, which have been reported to influence milk yield. Those factors are often linked together to contribute to the variation of milk production. This research is addressed to study the fixed effect factors, including lactation curve, which should be considered for genetic evaluation of milk yield based on test day records of dairy cattle. The data were taken from four different farms, which were PT. Taurus Dairy Farm, BPPT Cikole, Bandang Dairy Farm, and BBPTU Baturraden. In total of 16806 test day records were evaluated, consisting of 9,302 at first and 7,504 at second lactation, respectively. The results indicated that fixed effects were very specific and the influences had different patterns for each farm. Consequently, in a genetic evaluation, these factors such as lactation, temperature, year, day of rain, and humidity need to be evaluated first.  Ali-Schaeffer curve represented the most appropriate curve to use in the genetic evaluation of dairy cattle in Indonesia. Key words: Fixed Effects, Milk Production Curve, Test Day, Dairy Cattle
Co-Authors Acep Irham G Andre R. Daud Cece Sumantri Didin Tasripin Dudi Syadili Endang Yuni Setyowati HARIMURTI MARTOJO Heni Indrijani Iwan Setiawan Johar Arifin Rija Sudirja Sri Bandiati Komar Sulasmi - Tuti Widjastuti Unang Yunasaf WIDIANINGRUM, DINI