从第四世代起执行这个选择方案，经过第四、第五、第六世代三个世代的选择，使90公斤左右育肥猪的瘦肉率从55.46%提高到56.71%。

Percentage of lean meat of finishers with the weight of 90 kg or so raises from 55.46 to 56.71% through selection for the fourth fifth and sixth generation.

youdao

从第四世代起执行这个选择方案，经过第四、第五、第六世代三个世代的选择，使90公斤左右育肥猪的瘦肉率从55.46%提高到56.71%。

Percentage of lean meat of finishers with the weight of 90 kg or so raises from 55.46 to 56.71% through selection for the fourth fifth and sixth generation.

youdao