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Prolactin as a Candidate Gene Controlling Molting and Egg Production of Duck Susanti, Triana
Indonesian Bulletin of Animal and Veterinary Sciences Vol 25, No 1 (2015)
Publisher : Indonesian Animal Sciences Society

Incidence of molting is a crucial problem in the local ducks that need to be handled from many aspects including genetic aspect. Handling of molting genetically can be done quickly and accurately when the control genes have been found. The search for marker genes of molting can be conducted in poultry through broodiness naturally, because its physiological processes are related to the continuity of egg production. This paper describes the mechanism of molting, the relationship of molting with prolactin hormone and the association of prolactin gene polymorphism with molting and egg production. Molting and egg production were influenced by the prolactin hormone, that may be controlled by the prolactin gene. High concentration of prolactin hormone will inhibit the function of pituitary gland, decreasing production of gonadotrophin hormone (follicle stimulating hormone and luteinizing hormone) hence ovulation ceased. This will stop egg production and at the same time molting proccess occurred. Key words: Prolactin gene, molting, egg production, duck

Reciprocal crossing between Tegal and Mojosari ducks : I . Early gowth and early egg production L. Hardi Prasetyo; Triana Susanti
Jurnal Ilmu Ternak dan Veteriner Vol 2, No 3 (1997)
Publisher : Indonesian Center for Animal Research and Development (ICARD)

In !ndonesia, duck farming plays an important role in meeting the demand for eggs and as an alternative source of income for small farmers . However, the production efficiency of duck farming is still very low because of small ownership and low quality of breeding stock . One way of improving the quality of breeding stock is by using crossbreds from various breeds of local ducks to exploit heterosis which may arise from the crossings . In order to test the performance of Tegal and Mojosari crossbreds, 250 ducks each of Mojosari and Tegal breeds were used and crossed to produce TT (Tegal x Tegal), TM (Tegal x Mojosari), MT (Mojosari x Tegal), and MM (Mojosari x Mojosari) . In this report, observations were taken only during the early gowth and the first egg laying. Results show that crossbreds between Mojosari did and Tegal not show any superiority to the parental breeds on young drakes at early gowth, while on young female ducks, the crossbred TM even showed a smaller body weight gain up to 8 weeks, although still similar to MM. The crossbred MT approached the performance of TT which is higher than TM or MM. This indicates a strong maternal effect, which was also confirmed by the findings on the age at first laying . In this early stage of gowth, there is no significant heterosis among the crossbreds. This confirms that these duck breeds can not be expected as meat producers . Observation of heterosis on components of egg production will describe more of the production potentials of these breeds. Keywords : Duck, crossbreeding

Estimation of genetic parameters for body weight of Alabio and Mojosari ducks at starter period L. Hardi Prasetyo; Triana Susanti
Jurnal Ilmu Ternak dan Veteriner Vol 12, No 3 (2007): SEPTEMBER 2007
Publisher : Indonesian Center for Animal Research and Development (ICARD)

A selection program is one of many important tools in livestock breeding in improving the quality of breeding stock. The choice of an effective selection method requires some information on the value of genetic parameters for some economically important traits, such as heritabilities and genetic correlation coefiicients. This experiment used 25 drakes and 100 ducks of each Alabio and Mojosari ducks, mated at random 1 drake to 4 ducks. A number of ducklings were obtained from each mating in each population, and their body weights were observed from hatching to 8 weeks old. Results showed that the heritability estimation for body weight to 8 weeks old were generally low either in Alabio or in Mojosari, ranging between 0.061 to 0.227. The highest heritability estimation was obtained for 6-week body weight 0.151 for Alabio and 0.227 for Mojosari ducks. The estimates of genetic correlation among body weights varied widely but generally high. It is concluded that 6-week body weight can be considered as a selection criterion depending on the selection objective in the local Indonesian ducks. Key Words: Heritability, Genetic Correlation, Ducks

Growth regression models at two generations of selected populations Alabio ducks Triana Susanti; L Hardi Prasetyo
Jurnal Ilmu Ternak dan Veteriner Vol 12, No 4 (2007): DECEMBER 2007
Publisher : Indonesian Center for Animal Research and Development (ICARD)

A selection process to increase egg production of Alabio ducks was conducted in Balai Penelitian Ternak, Ciawi-Bogor. The selection aimed at increasing production, however observation on growth of the selected ducks was necessary since early growth stage (0-8 wks) determines the performance during laying period. This paper presents the growth models and the coefficient of determination of two generations of selected Alabio ducks. Body weight were observed weekly on 363 ducks from F1 and 356 ducks from F2, between 0-8 weeks and then fortinghly until 16 weeks. Growth curves were analysed using regression models between age and bodyweight of each population. The selection of model with the best fit was based on the large value of determination coefficient (R2), small value of MSE, and sinificant level of regression coefficient. Result showed that cubic polynomial regression was the best fit for the two populations, Y = 56.31-1.44X+0.64X2-0.005X3 for F1 and Y = 43.05 + 0.96X + 0.69X2 - 0.0056X3 for F2. The values of R2 were 0.9466 for F1 and 0.9243 for F2, and the values of MSE were 11.586 for F1 and 19.978 for F2. The growth of F1 is better during starter period, but F2 is better during grower period. Key Words: Regresion, Growth, Alabio Duck

Relationship of molting trait and egg production on crossbred Peking and Alabio ducks Triana Susanti; R.R Noor; P.S Hardjosworo; L.H Prasetyo
Jurnal Ilmu Ternak dan Veteriner Vol 17, No 2 (2012): JUNE 2012
Publisher : Indonesian Center for Animal Research and Development (ICARD)

Selection program through 6 months egg production record as criterion of selection can improve number of egg in a year. However the selected population has still showed molting which is influenced the cessation of egg production, so that its production has not optimal yet. The research has conducted to further learn about the relationship between molting and egg production. This study used 90 females AP ducks (the crossbred of Alabio ♂ and Peking ♀) and 90 females PA ducks (the crossbred of Peking ♂ and Alabio ♀). Observed variables were onset of molting, the length of molting periode and the egg production for 48 weeks. The collected data were analyzed by analysis of variance, correlation and regression. The results showed that based on the starting time of molting the ducks can be categorized into two group i.e (a) molting duck group and (b) non-molting duck group. There were 63 PA ducks characterized non-molting and 21 molting, and there were 42 non-molting and 45 molting in AP ducks. The egg production of these two groups was significantly different (P < 0.01). Since the molting was negatively correlated to the 48 weeks egg production (r = -0.896 for PA and -0.553 for AP), then this trait can be used as the selection criterion for egg production.The linear regression equation for PA of 48 weeks egg production = 80.7-0.369 molting duration, and for AP of 48 weeks egg production = 84 - 0.299 molting duration. Key Words: Molting, Egg Production, Duck

Prolactin as a Candidate Gene Controlling Molting and Egg Production of Duck Triana Susanti
WARTAZOA, Indonesian Bulletin of Animal and Veterinary Sciences Vol 25, No 1 (2015): MARCH 2015
Publisher : Indonesian Center for Animal Research and Development

Incidence of molting is a crucial problem in the local ducks that need to be handled from many aspects including genetic aspect. Handling of molting genetically can be done quickly and accurately when the control genes have been found. The search for marker genes of molting can be conducted in poultry through broodiness naturally, because its physiological processes are related to the continuity of egg production. This paper describes the mechanism of molting, the relationship of molting with prolactin hormone and the association of prolactin gene polymorphism with molting and egg production. Molting and egg production were influenced by the prolactin hormone, that may be controlled by the prolactin gene. High concentration of prolactin hormone will inhibit the function of pituitary gland, decreasing production of gonadotrophin hormone (follicle stimulating hormone and luteinizing hormone) hence ovulation ceased. This will stop egg production and at the same time molting proccess occurred. Key words: Prolactin gene, molting, egg production, duck

The Characteristic and The Use of Pelung Chicken in Indonesia Sofjan Iskandar; Triana Susanti
WARTAZOA, Indonesian Bulletin of Animal and Veterinary Sciences Vol 17, No 3 (2007): SEPTEMBER 2007
Publisher : Indonesian Center for Animal Research and Development

Pelung chicken is one of livestock genetic resources in Indonesia, which has been playing an important role for years in the villagers in West Java Province. Pelung chicken originally came from Cianjur district in West Java area. It has been raised as a singing cockerel. This singing ability of the cockerel has become the main criteria for Pelung chicken regular competition in Cianjur. A serious attention on Pelung chicken can maintain the existence of Pelung chicken. The specific character of Pelung chicken compared to other native chicken in Indonesia is the large size of its body. This character could be used to improve the growth rate up to 20% bodyweight and the feed utilization efficiency up to 10% when crossbred with Kampung chicken. The economic value of Pelung chicken is not only its beautiful voice but also as a source of local chicken meat. Further research on any genetic potential of Pelung chicken is strongly suggested. Key words: Pelung chicken, characteristic, the use of

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