Backcross breeding.
Backcross breeding.
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DOI：
10.1007/978-1-59745-494-0_14
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发表时间：
2009
影响因子：
--
通讯作者：
Karla E Vogel
中科院分区：
文献类型：
--
作者：
Karla E Vogel
回交育种使育种者能够将所需的性状（例如来自一个品种（供体亲本，DP）的转基因）转移到另一个品种（轮回亲本，RP）的有利遗传背景中。如果感兴趣的性状是由显性基因产生的，则该过程涉及七个季节内的四轮回交。如果该基因是隐性的，则该过程需要更多代的自交，因此需要九个或更多个季节。可以使用所利用的回交代数来计算植物的基因组成中DP基因被去除和RP基因被恢复的速率。随着标记技术的最新进展，这一比率急剧增加，该技术允许育种者控制感兴趣的基因并控制遗传背景。
Backcross breeding enables breeders to transfer a desired trait such as a transgene from one variety (donor parent, DP) into the favored genetic background of another (recurrent parent, RP). If the trait of interest is produced by a dominant gene, this process involves four rounds of backcrossing within seven seasons. If the gene is recessive, this process requires more generations of selfing and thus nine or more seasons are needed. The rate at which the DP genes are removed and the RP genes are recovered in the genetic makeup of the plant can be calculated using the number of backcross generations utilized. This rate is dramatically increased with the recent advances in marker technology which allow breeders to control the gene of interest and control the genetic background.