| Abstrakt: |
Genetic improvement through selection requires the estimation of the heritability parameter of the desired trait to estimate the breeding value of parents for the next mating. Heritability values of milk yields were estimated in Saanen goat kept under intensive management in Sukabumi District, West Java. Data of various 30-d partial cumulative milk yields (30-d PCMYs) from 277 records of the female offsprings of 12 Saanen bucks were used to estimate heritability values (h2) by paternal half-sibs method. General linear model (GLM) was fitted by considering each of the 30-d PCMYs (from 30 to 180 days) as independent variables. Whereas dependent variables were considered as fixed variables for the buck, lactation period (1-≥7), calving season (1-3, 4-6, 7-9, and 10-12 months), and kidding years (2004-2014). Averages of the 30-d PCMYs at 30-d, 60-d, 90-d, 120-d, 150-d, and 180-d lactations were consecutively 51±14 lt, 103±30 lt, 152±43 lt, 198±59 lt, 237±70 lt, and 272±82 lt. Estimated heritability values (h2) of the respective 30-d PCMYs were successively h2=0.228±0.103, 0.220±0.182, 0.192±0.183, 0.177±0.183, 0.158±0.184, dan 0.169±0.184. Milk yields of the observed Saanen goats were moderately influenced by the genetic diversity of the bucks. The reason might be a random mating by using the available Saanen bucks and does in mating activity still allowing sufficient genetic diversity of milk production in this population. [ABSTRACT FROM AUTHOR] |
