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Any genuine scholar of animal breeding will know how to distinguish between records and objectives, and how to optimally use them.
Some people tend to confuse recording (and the resultant prediction of genetic merit) with breeding objectives, and even mating plans. Figure 1 illustrates the differences among breeding objectives, selection based on genetic merit and mating plans.
Selection has no purpose unless a proper breeding objective is formulated and pursued. Such an objective must be built on the individual relative economic contributions of each of the measurable traits and properties considered for measurement and recording.
Market forces and price structures should play a major role, but other profit drivers, such as biological efficiency and expected correlated responses of selection, should also be considered. This should then result in the drafting of selection indices and other selection criteria to consider selection candidates (to be the parents of the next generation).
There is no compromise for accurate and thorough measurement, assessment and recording of the traits contributing towards the breeding objective. All proper genetic merit predictions rely on proper recording.
The next very important step in attaining the objectives is to rank all selection candidates on their genetic merit for the selection indices stemming from the objective, and to cull those not fitting to be parents for the next generation.
This step also involves the scanning of the wider population (breed), especially for males that can accelerate the pace to achieve the objective.
هذه القصة مأخوذة من طبعة October 27, 2023 من Farmer's Weekly.
ابدأ النسخة التجريبية المجانية من Magzter GOLD لمدة 7 أيام للوصول إلى آلاف القصص المتميزة المنسقة وأكثر من 9,000 مجلة وصحيفة.
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هذه القصة مأخوذة من طبعة October 27, 2023 من Farmer's Weekly.
ابدأ النسخة التجريبية المجانية من Magzter GOLD لمدة 7 أيام للوصول إلى آلاف القصص المتميزة المنسقة وأكثر من 9,000 مجلة وصحيفة.
بالفعل مشترك? تسجيل الدخول
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More funding needed to flood-proof Olifants River
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Expanded market brings avocado season success
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Kruger's memory lingers in his Boekenhoutfontein farmhouses
Lucille Davie visits Kedar Heritage Lodge in North West to see the farmhouses Paul Kruger owned.
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From street art to feats of engineering, Bristol has it all
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Managing broodmares and foals profitably and safely
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Double cab's leisure features find favour
The GWM P500 2.0T HEV 4x4 Super Luxury AT has launched in South Africa, and the bakkie takes aim at the more premium, leisure-focused offerings from rival brands. Car Magazine's Marius Boonzaier writes.
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More fungal diseases that can infect beans
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Keeping invasive insects at bay
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