Diallel Analysis for Bodyweight Involving Three Genotypes of Nigerian Indigenous Chickens

Abstract

To evaluate heterosis, reciprocal effect, general and specific combining abilities for bodyweight, a diallel crossing experiment was conducted using three genotypes of Nigerian indigenous chickens: normal (N), frizzle (F) and naked-neck (Na). A total of 601 chicks was hatched from all possible matings between the three genotypes. The chicks used in this study were hatched from a foundation stock of 90 chickens comprising 25 hens and 5 cocks for each of the three genotypes. A mating ratio of 1 male : 5 females was employed. Furthermore, data on bodyweight were scrutinized with complete diallel analysis after they had been corrected for significant effects of hatch of birds using least squares constants. The results revealed that bodyweight (BWT) was significantly influenced by genetic groups with the frizzle-naked (FNa) having the best performance at all ages (4 -20 weeks) except at hatch, with a mean final BWT of 1173 g at 20 weeks old. The next best performing was its reciprocal, the naked-frizzle (NaF), with a mean final BWT of 1162 g. Furthermore, the FNa gave the best estimates for heterosis and specific combining ability, while the F and NNa gave the best estimates for general combining ability and reciprocal effect, respectively. Therefore, the F genotype as sire and the Na as dam provided the most suitable combination for improved BWT. Furthermore, the use of the Na genotype as dam was more suitable owing to the significant reciprocal effect. ______________________________________________________________________________________

Combining Abilities and Heterosis of Body Weight in a Diallel Cross From Three South African Indigenous Chicken Genotypes

“…Our results based on cross for heterosis, the effects for body weights were mostly positive and ranged from -14.11 to 30.07% during different age intervals up to 10 weeks of age. However, Musa et al (2015) reported that heterosis for body weight ranged from -9.44 to 13.48% after crossing three genotypes of Nigerian indigenous chickens. Results of the current study revealed that the P x V cross had encouraging heterosis at all different ages of measurement except at 10 weeks of age when compared to its reciprocal V x P, that had positive heterosis at all ages and highest 10 weeks of age.…”

“…These findings indicate that Potchefstroom Koekoek sires and Ovambo dams as well as Venda and Venda sires gave the highest heterosis for growth traits. Furthermost reviewed studies showed that body weights of crossbred chickens at different ages were related with negative and positive heterosis effects for growth traits (Sutherland et al, 2018;Musa et al, 2015;Siwendu et al, 2012). However, Nwenya et al (2017) reported a positive heterosis for body weight after crossing Naked neck and Frizzled feather chickens.…”

“…The aims of the study were to discover and underline the general combining abilities, heterotic effects and specific combining abilities for body weight in a three-way cross between Potchefstroom Koekoek, Ovambo and Venda chicken genotypes. According to Musa et al (2015), crossing indigenous chicken genotypes has led to the improvement in growth rates and body weight. This study will help chicken farmers to determine the perfect combination of indigenous chicken genotypes during breeding program to improve body weight.…”

Estimation of Combining Ability of Production Traits from Diallel Crosses of Korean Native Chicken Strains

“…지금까지 대표적인 닭의 결합능력 추정에 대한 연구로서 난용종의 계통 간 교배를 이용한 생산능력에 대한 결합능력이나 White Leghorn(WL) 과 Rhode Island Red(RIR)간의 교배와 같이 품종 간 교잡자 손의 산란능력에 대한 결합능력이 보고된 바 있다 (Hill and Nordskog, 1958;Goto and Nordskog, 1959;Wearden et al, 1965Wearden et al, , 1967Ohh et al, 1980Ohh et al, , 1986. 또한 육용계통과 겸용계 통 간의 교배조합이나 국내 토종닭의 계통 간 교배 및 외래 품종 간의 교배조합을 이용한 산육성을 중심으로 한 생산능 력에 대한 결합능력도 보고되었다 (Cheong et al, 1985;Choi, 2002;Mohammed et al, 2005;Saadey et al, 2008;Adebambo et al, 2010Adebambo et al, , 2011Razuki and Al-Shaheen, 2011;Musa et al, 2015). 결합능력 추정 결과들에서 유전력이 높은 체중과 같 은 체 형질의 경우는 상가적 유전효과인 일반결합능력이 주 된 요인으로 작용한 반면, 산란능력과 같은 유전력이 낮은 형질에서는 비상가적 유전효과인 특정결합능력이 상대적으 로 크게 영향을 미치는 것으로 보고하였다.…”

“…이러한 결과 는 WL의 계통 간 교배에서 보고한 산란율의 일반결합능력 -8.17∼9.39 및 -9.96∼7.11과 거의 유사한 결과이다 (Ohh et al, 1980(Ohh et al, , 1986. (Ohh et al, 1980(Ohh et al, , 1986, KNC의 계통 간 교잡에서는 -7.31∼14.25로 추정하 et al, 1985;Razuki and Al-Shaheen, 2011;Musa et al, 2015). Table 6은 조합별 시산일령, Table 7은 조합별 난중, Table Table 6.…”