Chromosome Number Manipulation as Part of Potato Pre-breeding Programs

• 作 者: Kear Philip J
• 机 构: College of Agronomy Northeast Agricultural University,Harbin,Heilongjiang 150030,China,
• 出 处: 中国马铃薯
• 发表日期: 2008年01期
• 关键词: breeding potato chromosome Solanum cultivated tetraploid Chromosome utilized inc

The cultivated potato(Solanum tuberosum L.) is a tetraploid(2n=4x=48) and can be improved with the incorporation of desirable traits from other Solanum species.Often the transfer of these traits is hindered by complex genetics and breeding barriers within potato.Parthenogenesis and microsporogenesis are used in chromosome number manipulation allowing breeders to reduce the potato’s chromosome number to dihaploid(2n=2x=24)[diploid] or monohaploid(2n=x=12) from which a predictable transfer of traits can be made,in accordance with the endosperm balance number theory(EBN).Furthermore,the reproductive processes of first division restitution(FDR) and second division restitution(SDR) are utilized in order to increase the chromosome number for incorporation into the cultivated potato.

The cultivated potato (Solanum tuberosum L.) is a tetraploid (2n = 4x = 48) and can be improved with the incorporation of desirable traits from other Solanum species. Often the transfer of these traits is hindered by complex genetics and breeding barriers within potato . Parthenogenesis and microsporogenesis are used in chromosome number manipulation allowing breeders to reduce the potato’s chromosome number to dihaploid (2n = 2x = 24) [diploid] or monohaploid (2n = x = 12) from which a predictable transfer of traits can be made, in accordance with the endosperm balance number theory (EBN) .Furthermore, the reproductive processes of first division restitution (FDR) and second division restitution (SDR) are utilized in order to increase the chromosome number for incorporation into the cultivated potato.