Reinventing the tetraploid potato into a seed-propagated,diploid,hybrid potato would significantly accelerate potato breeding.In this regard,the development of highly homozygous inbred lines is a prerequisite for bree...Reinventing the tetraploid potato into a seed-propagated,diploid,hybrid potato would significantly accelerate potato breeding.In this regard,the development of highly homozygous inbred lines is a prerequisite for breeding hybrid potatoes,but self-incompatibility and inbreeding depression present challenges for developing pure inbred lines.To resolve this impediment,we developed a doubled haploid(DH)technology,based on mutagenesis of the potato DOMAIN OF UNKNOWN FUNCTION 679 membrane protein(StDMP)gene.Here,we show that a deficiency in StDMP allows the generation of maternal haploids for generating diploid potato lines.An exercisable protocol,involving hybridization,fluorescent marker screening,molecular and flow cytometric identification,and doubling with colchicine generates nearly 100%homozygous diploid potato lines.This dmp-triggered haploid induction(HI)system greatly shortens the breeding process and offers a robust method for generating diploid potato inbred lines with high purity.展开更多
基金supported by the Guangdong Major Project of Basic and Applied Basic Research(2021B0301030004)the National Natural Science Foundation of China(Grant No.31991185,31902027)supported by the Agricultural Science and Technology Innovation Program of Chinese Academy of Agricultural Science.Author information。
文摘Reinventing the tetraploid potato into a seed-propagated,diploid,hybrid potato would significantly accelerate potato breeding.In this regard,the development of highly homozygous inbred lines is a prerequisite for breeding hybrid potatoes,but self-incompatibility and inbreeding depression present challenges for developing pure inbred lines.To resolve this impediment,we developed a doubled haploid(DH)technology,based on mutagenesis of the potato DOMAIN OF UNKNOWN FUNCTION 679 membrane protein(StDMP)gene.Here,we show that a deficiency in StDMP allows the generation of maternal haploids for generating diploid potato lines.An exercisable protocol,involving hybridization,fluorescent marker screening,molecular and flow cytometric identification,and doubling with colchicine generates nearly 100%homozygous diploid potato lines.This dmp-triggered haploid induction(HI)system greatly shortens the breeding process and offers a robust method for generating diploid potato inbred lines with high purity.
