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

dc.creatorChaikam, V.
dc.creatorGowda, M.
dc.creatorNair, S.K.
dc.creatorMelchinger, A.E.
dc.creatorPrasanna, B.M.
dc.date2019-08-26T21:32:27Z
dc.date2019-08-26T21:32:27Z
dc.date2019
dc.date.accessioned2023-07-17T20:04:20Z
dc.date.available2023-07-17T20:04:20Z
dc.identifier0014-2336
dc.identifierhttps://hdl.handle.net/10883/20217
dc.identifier10.1007/s10681-019-2459-5
dc.identifier.urihttps://repositorioslatinoamericanos.uchile.cl/handle/2250/7512035
dc.descriptionEfficient 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 which refers to pollen production and haploid fertility which refers to seed production upon self-fertilization. A small number of genotypes were highly fertile and these fertility traits were highly heritable. Agronomic traits like plant height, ear height and tassel branch number were positively correlated with fertility traits. In contrast, haploid induction rate of the source germplasm and plant aspect were not correlated to fertility traits. Several genomic regions and candidate genes were identified that may control spontaneous fertility restoration. Overall, the study revealed the presence of large variation for both haploid male fertility and haploid fertility which can be potentially exploited for improving the efficiency of doubled haploid derivation in tropical maize germplasm.
dc.formatPDF
dc.languageEnglish
dc.publisherSpringer
dc.relationhttp://hdl.handle.net/11529/10431
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dc.rightsOpen Access
dc.source8; art. 138
dc.source215
dc.sourceEuphytica
dc.subjectAGRICULTURAL SCIENCES AND BIOTECHNOLOGY
dc.subjectDoubled Haploid
dc.subjectHaploid Male Fertility (HMF)
dc.subjectHaploid Female Fertility (HFF)
dc.subjectHaploid Fertility (HF)
dc.subjectGenome-Wide Association Study
dc.subjectGenomic Prediction
dc.subjectGWAS
dc.subjectDIHAPLOIDY
dc.subjectGENOMES
dc.subjectFERTILITY
dc.subjectMAIZE
dc.titleGenome-wide association study to identify genomic regions influencing spontaneous fertility in maize haploids
dc.typeArticle
dc.typePublished Version
dc.coverageNetherlands


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