Genome-wide association study to identify genomic regions influencing spontaneous fertility in maize haploids.

ABSTRACT: Efficient production and use of doubled haploid lines can greatly accelerate genetic gains in maize breeding programs. One of the critical steps in standard doubled haploid line production is doubling the haploid genome using toxic and costly mitosis-inhibiting chemicals to achieve fertility in haploids. Alternatively, fertility may be spontaneously restored by natural chromosomal doubling, although generally at a rate too low for practical applications in most germplasm. This is the first large-scale genome-wise association study to analyze spontaneous chromosome doubling in haploids derived from tropical maize inbred lines. Induction crosses between tropicalized haploid inducers and 400 inbred lines were made, and the resulting haploid plants were assessed for haploid male fertility whic

SUBMITTER: Chaikam V 

PROVIDER: S-EPMC6647887 | biostudies-literature | 2019

REPOSITORIES: biostudies-literature