Understanding Genetic Load in Potato for Hybrid Diploid Breeding
作者机构：Plant Breeding Wageningen University and Research Wageningen the Netherlands Solynta Wageningen the Netherlands
出 版 物：《Molecular Plant》 (分子植物（英文版）)
年 卷 期：2019年第12卷第7期
页 面：896-898页
核心收录：
学科分类：0710[理学-生物学] 07[理学] 09[农学]
主 题：Genetic Load Potato Hybrid Diploid Breeding
摘 要：Recently, Zhang et al.(2019) have managed to provide abundant evidence to support long-held theories regarding mechanisms of inbreeding depression and potential effects of heterosis that are likely to have a considerable impact on potato breeding in the future (Figure 1). Despite its large genetic variation regarding yield, harvest index, and water use efficiency, potato breeding has attained only negligible advances in the most important breeding goals such as yield, tuber quality, and abiotic stress tolerance, and only modest progress in pathogen resistance. This low level of improvement is clearly due to the complexity of breeding a heterozygous tetraploid outbreeder rather than to the lack of genetic potential available in wild and cultivated material. In contrast, breeding at the diploid level, in particular in combination with self-compatibility, will allow the fixation of beneficial alleles to homozygosity.
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