پديد آورندگان :
صادقي، ابوطالب دانشگاه زابل - دانشكده كشاورزي - گروه علوم دامي , ركوعي، محمد دانشگاه زابل - دانشكده كشاورزي - گروه علوم دامي , وفايي واله، مهدي دانشگاه زابل - دانشكده كشاورزي - گروه علوم دامي , عباسي، مختارعلي سازمان تحقيقات آموزش و ترويج كشاورزي، كرج , فرجي آروق، هادي دانشگاه زابل - پژوهشكده دام هاي خاص
چكيده لاتين :
Abstract
Background and objective: Increasing the profitability of each production unit is the most
important way to increase its competitiveness in all fields, including animal husbandry. The first
step in designing livestock breeding programs is to decide on appropriate breeding goals and the
lack of precise breeding goal determination is the most important factor behind the inadequacy
of livestock breeding programs. Therefore, the determination of the breeding objectives and
economic values of the important traits in the Adani goat, which is one of the important
livestock of the Persian Gulf coastal strip, will greatly help the breeding of this animal.
Materials and methods: In this study, a deterministic static model which assumes no variation
among animals for the important traits was used for calculation of economic values. In order to
estimate the required parameters (demographic, productive, reproductive, managerial, and
economic), for a whole year of production (from the 1st of September 2016 to the 1st of
September 2017), seven flocks of Adani goats with 920 does were directly recorded. The
economic values of the traits were calculated by generating profit equations and changing the
traits by one percent or one unit, while the mean of other traits was constant at the average of
the population. The economic weight of the traits was calculated for a genetic standard
deviation of the increase in the corresponding trait while the other traits were maintained at a
constant average. To achieve a better comparison between the economic values of the traits,
their relative importance was determined.
Results: The results of this study showed that the highest income was came from kid sales and
milk and the largest share of the cost was the management and labor contribution. The economic
weight of traits that were included in the objective goals of the Adani goat including kidding
rate, number of kidding per year, litter size, the weight of the kid sales at 12 months, conception
rate, survival of the kid to weaning, doe survival, survival from weaning to sales, milk
production, mature doe weight, and twining rate were 22.7, 17.5, 12.8, 12.1, 10.1, 9.8, 9, 4.6,
1.9, -0.7 and 0.3, respectively.
Conclusion: Reproduction, longevity, and production traits are the most important trait in
Adani goats, respectively. According to the breeding conditions of this animal, number of
kidding per year, kidding rate, litter size, the weight of the kid sales at 12 months, conception
rate, survival of the kid to weaning, doe survival, kid survival from weaning to sales and milk
production are the most important traits, respectively, and must be regarded more in breeding
programs for Adani Goats.
