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Reciprocal crossing between Tegal and Mojosari ducks : I . Early gowth and early egg production Prasetyo, L. Hardi; Susanti, Triana
Indonesian Journal of Animal and Veterinary Sciences Vol 2, No 3 (1997)
Publisher : Indonesian Animal Sciences Society

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. Â Keywords : Duck, crossbreeding

Estimation of genetic parameters for body weight of Alabio and Mojosari ducks at starter period Prasetyo, L. Hardi; Susanti, Triana
Indonesian Journal of Animal and Veterinary Sciences Vol 12, No 3 (2007)
Publisher : Indonesian Animal Sciences Society

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

Heterosis of the crossbred between Tegal and Mojosari ducks under sub-optimal condition Prasetyo, L. Hardi
Indonesian Journal of Animal and Veterinary Sciences Vol 12, No 1 (2007)
Publisher : Indonesian Animal Sciences Society

Crossbreeding between two different strains or breeds is often done in a livestock production system to take advantage of the heterosis (hybrid vigour) which may resulted from the crossing. The level of heterosis largely depend on the genetic distance betweeen the two parental groups, and is also affected by the environmental condition in which the heterosis would be more significant under less optimal condition. The aim was to evaluate the heterosis level of the crosses between Tegal and Mojosari ducks under stressful environment of low nutritional content (14% protein) in the diet. The experiment was conducted in the animal facilities of the Indonesian Research Institute for Animal production, using 40 Tegal (TT) ducks, 44 Mojosari ducks (MM), 46 crossbreds between Tegal drakes and Mojosari ducks (TM), and 42 crossbreds between Mojosari drakes and Tegal ducks (MT). Results showed that heterosis was not significant for the average age at first laying (AFL) and weight of first egg (WFE), in which AFL of TT (171.8 d) was not significantly different from that of MT (163.4 d) and both were shorter than the AFL of MM (182.3 d) or that of TM (182.8 d). Heterosis also did not exist on egg production to 68 weeks old (EP-68), in which the EP-68 of TT was 141.3 eggs and that of MT was 122.6 eggs, and both were lower than EP-68 of MM (156.8 eggs)Â or of TM (154.0 eggs). For egg qualities, heterosis also did not show any significant level and difference between genotypes only existed for the Haugh Unit values. It seems that even under stressful environment heterosis did not exist among crosses between Tegal and Mojosari ducks, and therefore it can be concluded that the crosses between these two breeds will not produce any beneficial effects in a production system under any condition. Key Words: Heterosis, Ducks, Low Protein Diet

Effect of genotypes and aflatoxin levels in the diets on early laying characteristics of local ducks Prasetyo, L. Hardi; Susanti, T
Indonesian Journal of Animal and Veterinary Sciences Vol 15, No 3 (2010)
Publisher : Indonesian Animal Sciences Society

Layer ducks are known for their sensitivity to aflatoxin contamination in their diets, and this has been causing problem in egg productivity of local ducks due to feeding system practiced by traditional farmers. This study was aimed at exploring the level of sensitivity of Mojosari and Tegal ducks to different aflatoxin levels in their diets, especially on characteristics during early laying period. Three hundreds and nine female Mojosari ducks and 260 female Tegal ducks were used in this study. Two levels of aflatoxin in the diets, 0 and 150 ppb, were given to 4 week-old ducklings for 4 weeks. Observations were taken on age at first laying, body weight at first laying, and egg qualities as early indications of the egg production potentials. The results showed that different levels of aflatoxin in the diets only affected live weight at first laying, and not age at first laying. The two genotypes differed significantly in egg weight, yolk weight, and shell weight. It is concluded that aflatoxin contamination in the diets during early growth did not really affect characteristics of early laying of Mojosari and Tegal ducks. Key Words: Local Ducks, Aflatoxin

Growth and carcass production responses of EPMp broiler ducks to various levels of crude fiber and protein in the diet Purba, Maijon; Prasetyo, L. Hardi
Indonesian Journal of Animal and Veterinary Sciences Vol 19, No 3 (2014)
Publisher : Indonesian Animal Sciences Society

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14334/jitv.v19i3.1085

Inclusion of crude fiber in diet is important for duck growth, but there is a limit in its use in order for the ducks to grow normally. The purpose of this study was to evaluate growth and carcass production responses of EPMp broiler ducks under different levels of crude fiber and protein in diets. Four hundreds and twenty day old ducklings were allocated into 7 treatments with 6 replications and each replication consisted of 10 ducks. The treatments were the factorial combinations of crude fiber content of 6 or 9% and protein content of 19, 21, or 23%; and BR-1 (starter diet) as positive control. The variables observed were: feed intake, weekly body weight, and percentage of carcass production. The results showed that all variables observed were not significantly affected by CF content, but highly significantly affected by crude protein levels in diet. Protein content of 19 or 21% in diet resulted in a better performance for EPMp ducks. The inclusion of high CF in diet did not affect carcass percentage, except for reduced abdominal fat. The study implies that administration of high CF (6 or 9%) with a protein content of 19 or 21% in the diet are still acceptable to EPMp ducks at 12 weeks. Key Words: EPMp Broiler Ducks, Crude Fiber, Performance, Carcass

Effect of genotypes and aflatoxin levels in the diets on early laying characteristics of local ducks L. Hardi Prasetyo; T Susanti
Jurnal Ilmu Ternak dan Veteriner Vol 15, No 3 (2010): SEPTEMBER 2010
Publisher : Indonesian Center for Animal Research and Development (ICARD)

Layer ducks are known for their sensitivity to aflatoxin contamination in their diets, and this has been causing problem in egg productivity of local ducks due to feeding system practiced by traditional farmers. This study was aimed at exploring the level of sensitivity of Mojosari and Tegal ducks to different aflatoxin levels in their diets, especially on characteristics during early laying period. Three hundreds and nine female Mojosari ducks and 260 female Tegal ducks were used in this study. Two levels of aflatoxin in the diets, 0 and 150 ppb, were given to 4 week-old ducklings for 4 weeks. Observations were taken on age at first laying, body weight at first laying, and egg qualities as early indications of the egg production potentials. The results showed that different levels of aflatoxin in the diets only affected live weight at first laying, and not age at first laying. The two genotypes differed significantly in egg weight, yolk weight, and shell weight. It is concluded that aflatoxin contamination in the diets during early growth did not really affect characteristics of early laying of Mojosari and Tegal ducks. Key Words: Local Ducks, Aflatoxin

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

Heterosis of the crossbred between Tegal and Mojosari ducks under sub-optimal condition L. Hardi Prasetyo
Jurnal Ilmu Ternak dan Veteriner Vol 12, No 1 (2007): MARCH 2007
Publisher : Indonesian Center for Animal Research and Development (ICARD)

Crossbreeding between two different strains or breeds is often done in a livestock production system to take advantage of the heterosis (hybrid vigour) which may resulted from the crossing. The level of heterosis largely depend on the genetic distance betweeen the two parental groups, and is also affected by the environmental condition in which the heterosis would be more significant under less optimal condition. The aim was to evaluate the heterosis level of the crosses between Tegal and Mojosari ducks under stressful environment of low nutritional content (14% protein) in the diet. The experiment was conducted in the animal facilities of the Indonesian Research Institute for Animal production, using 40 Tegal (TT) ducks, 44 Mojosari ducks (MM), 46 crossbreds between Tegal drakes and Mojosari ducks (TM), and 42 crossbreds between Mojosari drakes and Tegal ducks (MT). Results showed that heterosis was not significant for the average age at first laying (AFL) and weight of first egg (WFE), in which AFL of TT (171.8 d) was not significantly different from that of MT (163.4 d) and both were shorter than the AFL of MM (182.3 d) or that of TM (182.8 d). Heterosis also did not exist on egg production to 68 weeks old (EP-68), in which the EP-68 of TT was 141.3 eggs and that of MT was 122.6 eggs, and both were lower than EP-68 of MM (156.8 eggs) or of TM (154.0 eggs). For egg qualities, heterosis also did not show any significant level and difference between genotypes only existed for the Haugh Unit values. It seems that even under stressful environment heterosis did not exist among crosses between Tegal and Mojosari ducks, and therefore it can be concluded that the crosses between these two breeds will not produce any beneficial effects in a production system under any condition. Key Words: Heterosis, Ducks, Low Protein Diet

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 and carcass production responses of EPMp broiler ducks to various levels of crude fiber and protein in the diet Maijon Purba; L. Hardi Prasetyo
Jurnal Ilmu Ternak dan Veteriner Vol 19, No 3 (2014): SEPTEMBER 2014
Publisher : Indonesian Center for Animal Research and Development (ICARD)

Inclusion of crude fiber in diet is important for duck growth, but there is a limit in its use in order for the ducks to grow normally. The purpose of this study was to evaluate growth and carcass production responses of EPMp broiler ducks under different levels of crude fiber and protein in diets. Four hundreds and twenty day old ducklings were allocated into 7 treatments with 6 replications and each replication consisted of 10 ducks. The treatments were the factorial combinations of crude fiber content of 6 or 9% and protein content of 19, 21, or 23%; and BR-1 (starter diet) as positive control. The variables observed were: feed intake, weekly body weight, and percentage of carcass production. The results showed that all variables observed were not significantly affected by CF content, but highly significantly affected by crude protein levels in diet. Protein content of 19 or 21% in diet resulted in a better performance for EPMp ducks. The inclusion of high CF in diet did not affect carcass percentage, except for reduced abdominal fat. The study implies that administration of high CF (6 or 9%) with a protein content of 19 or 21% in the diet are still acceptable to EPMp ducks at 12 weeks

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