品系 meaning in English
strain
◇品系繁育 line breeding; 品系杂交 incross; line crossing
Examples
- Red strains of delicious are being planted .
元帅的红色品系也有栽植。 - One laboratory stock of drosophila melanogaster has very reduced or vestigial wings .
果蝇的一种实验品系，翅膀缩小，称为残翅。 - Then the hybrids are allowed to self-copulate naturally, and several lines are established .
然后让杂种天然自交，这样就形成几个品系。 - Breeding of poultry on a scientific basis has created strains of uniform quality .
在科学基础上进行家禽育种，已创造了质量一致的品系。 - However, a considerable degree of caution should be taken in the use of any or all color strains .
但是，在应用某一个或全部着色品系时必需相当谨慎。