fine-wool breeding line 优质毛品系
male breeding line 雄系 ; 父系
line breeding [农学] 品系繁育 ; [农学] 系统育种 ; 系群繁育
pure line breeding [农学] 纯系育种 ; 纯育
true-breeding line 纯育品系
commercial breeding line 商业育种品系
tetraploid breeding line 四倍体品系
diploid inbreeding and breeding line 二倍体品系和自交系
The first breeding line is expected to be released next year for use by private seed companies and public soybean breeders.
第一繁育系预计在明年发布，仅供私人种子公司和公共大豆种植者使用。
The team is now doing field tests. The first breeding line is expected to be released next year for use by private seed companies and public soybean breeders.
干旱小组目前正在做田间试验。第一繁育系预期在明年发布，仅为私人种子公司和公共大豆育种者使用。
Various approaches have been used to improve the performance of adapted indigenous stock, including cross-breeding and upgrading through back-crossing with improved breeds, and within-line selection.
已有多种方法被用于提高地方良种的性能，包括杂交育种，以及通过与良种的回交和品系内选育进行的品种改良。
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