Breeding Objectives and Desired-Gain Selection Index for Rayeni Cashmere Goat in Pasture System
محورهای موضوعی : Camel
ن. کارگر برزی
1
,
ا. آیت‌اللهی مهرجردی
2
,
م.ع. عباسی
3
1 - Department of Animal Science, Kerman Agricultural and Natural Resources Research and Education Center, Agricultural Research Education and Extension Organization (AREEO), Kerman, Iran
2 - Department of Animal Science, Faculty of Agriculture, Shahid Bahonar University of Kerman, Kerman, Iran
3 - Animal Science Research Institute of Iran (ASRI), Agricultural Research Education and Extension Organization (AREEO), Karaj, Iran
کلید واژه: breeding objectives, desired-gain selection index, Rayeni cashmere goat,
چکیده مقاله :
The aim of this study was to define breeding goals and determine the suitable selection index in Rayeni cashmere goat using simulated data. To select animals for increased quantity of meat, milk and cashmere produced, body weight of the doe (BWD), milk weight (MW), cashmere weight (CW), weight of kids for sale (WK) and number of kids for sale per doe (NK) was used as selection criteria. Four selection indices were proposed (I1–I4) to compare genetic gain for all traits included in indices based on selection index. Maximum of genetic gain was calculated for 0.04 buck ratio with the full selection index (I1). So, the most suitable selection index for this breed is index 1 which included BWD, MW, CW, WK and NK.
هدف از این مطالعه تعریف اهداف اصلاحی و شاخص انتخاب مناسب برای بز کرکی رایینی توسط شبیه‌سازی رایانهای بود. معیار انتخاب برای افزایش تولید شیر، گوشت و کرک در این نژاد وزن بدن بز ماده (BWD)، وزن شیر تولیدی (MW)، وزن کرک تولیدی (CW)، وزن بزغاله برای فروش (WK) و تعداد بزغاله برای فروش به ازای هر بز ماده بودند. چهار شاخص انتخاب (I1–I4) جهت مقایسه پیشرفت ژنتیکی برای صفات موجود در شاخص انتخاب تشکیل گردید. بیشترین پیشرفت ژنتیک در شاخص انتخاب کامل (I1) با نسبت بز نر 4/0 برآورد گردید. بنابراین مناسب ترین شاخص انتخاب در این نژاد شاخص انتخاب 1 شامل صفات وزن بدن بز ماده، وزن شیر تولیدی، وزن کرک تولیدی، وزن بزغاله برای فروش و تعداد بزغاله برای فروش به ازای هر بز ماده میباشد.
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