It was important to select replacement bulls of 18-month-old based on their growth and development and progeny testing in bo-hai Black Cattle.
根据生长发育和后裔性能测定选择18月龄后备种牛是渤海黑牛选择的重点。
The optimum group size of progeny of sire (or poultry) was disscussedwhen the total cost of testing was limited or the genetic gain was fixed.
本文在考虑后裔测定总费用受限或者遗传进展一定时，探讨了几种情况下的公畜（禽）后裔组的最佳值。
The optimum group size of progeny of sire (or poultry) was disscussedwhen the total cost of testing was limited or the genetic gain was fixed.
本文在考虑后裔测定总费用受限或者遗传进展一定时，探讨了几种情况下的公畜（禽）后裔组的最佳值。
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