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。
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.
讨论从这些杂交后代得到的品系中选育适于北京地区的草坪型高羊茅品种的可能性。
The possibility to develop, from the hybrid lines obtained, new turf-type tall fescue cultivars suitable for Beijing region was also discussed.
种质资源是杂优猪选育的基础，育种部分是杂优猪选育的核心，完成专门化品系的选育、配合力测定和最优杂交模式的筛选以及专门化品系的纯繁扩群；
The genetic resource is the base of the breeding of hybrid swine, breeding section is the core, in which completes the breeding of special strains, combining ability testing .
W025是通过化学诱变和杂交选育而成的水稻新品系，具有巨胚特征，遗传分析表明巨胚基因受单隐性基因控制。
W025 is a new rice strain developed from chemical inducement and cross breeding. It has a giant embryo that is controlled by a single recessive gene.
GS豫豆8号是用系谱法从郑74046品系与尖叶桥梁亲本自然杂交株的杂种后代中选育成的窄叶型大豆新品种。
GS Yudou 8 is a narrow-leafed soybean variety derived from the natural hybrid of Zheng 74046 line and a tip soybean parent material (paternal) with a pedigree selection method.
辽盐39是经过杂交选育的水稻新品系。
Liaoyan-39 is the new rice variety which is finished by hybridization breeding.
搜集典型籼粳品种、广亲和品种、偏籼或偏粳品系及恢复系并进行杂交。
Typical indica and japonica cultivars, cultivars with wide compatibility, indicaclinous and japonicaclinous strains and restoring lines were collected and crossed in this study.
首先把一个赖氨酸含量高的品系与一个具有丰产特性的品系相杂交。
First a strain with high lysine content is crossed with one having good yield characteristic.
通过杂交培育出优良品系，再返植到森林，以保证山葡萄生产所需及山葡萄酒质量。
Such quality breed was then planted in forest to ensure grape quality for wild grape wine production.
“华两优106”是以早熟早籼型温敏核不育系“M103S”为母本，与早稻新品系“T1005”配组而成的两系法杂交早稻新组合。
"Hualiangyou 106" was bred by crossing between early-maturing early indica temperature-sensitive genetic male sterile line "M103S"(mother parent) and new early rice line "T1005".
韦奇是在1850年从安特卫普一位称斯克威克schwyck先生处获得得赛鸽的，早于尤伦斯从维克·曼斯vekemans处引进鸽子进行杂交后形成品系的。
For Wegge received his first racing pigeons from a Mr Schwyck of Antwerp in about 1850 which preceded the Ulens cross via the Vekemans into his family.
韦奇是在1850年从安特卫普一位称斯克威克schwyck先生处获得得赛鸽的，早于尤伦斯从维克·曼斯vekemans处引进鸽子进行杂交后形成品系的。
For Wegge received his first racing pigeons from a Mr Schwyck of Antwerp in about 1850 which preceded the Ulens cross via the Vekemans into his family.
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