Breeding objectives for sheep should be customised depending on variation in pasture growth across years
نویسندگان
چکیده
منابع مشابه
Breeding objectives for Targhee sheep.
Breeding objectives were developed for Targhee sheep under rangeland production conditions. Traits considered were those for which EPD were available from the US National Sheep Improvement Program and included direct and maternal effects on 120-d weaning weight (WW and MM, respectively); yearling weight (YW); yearling fleece weight, fiber diameter, and staple length; and percent lamb crop (PLC)...
متن کاملBreeding Objectives and Desired-Gain Selection Index for Rayeni Cashmere Goat in Pasture System
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 se...
متن کاملA preference-based approach to deriving breeding objectives: applied to sheep breeding.
Using internet-based software known as 1000Minds, choice-experiment surveys were administered to experts and farmers from the Irish sheep industry to capture their preferences with respect to the relative importance - represented by part-worth utilities - of target traits in the definition of a breeding objective for sheep in Ireland. Sheep production in Ireland can be broadly separated into lo...
متن کاملExperience in Breeding Objectives for Beef Cattle , Sheep and Pigs , New Developments and Future Needs
Breeding objectives and their derivation are considered in relation to numerous changes occurring in genetics, in societal attitudes, and in the environment. We outline the experience in Australia with breeding objectives for beef cattle, sheep and pigs and discuss ramifications of the new developments for future objectives. Areas are suggested where more attention will be needed, and where the...
متن کاملBreeding objectives for beef cattle in Ireland
Breeding objectives for beef cattle in Ireland were derived and used to define selection sub-indexes. The intention of the sub-indexes was to simplify selection decisions by commercial bull and semen buyers for situations where all of the resulting progeny are slaughtered, or when some female progeny are kept as replacement breeding cows. Separate sets of economic values for calving ease and ge...
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ژورنال
عنوان ژورنال: Animal
سال: 2015
ISSN: 1751-7311
DOI: 10.1017/s1751731115000476