QTL mapping of chromosomal regions conferring reproductive frost tolerance in barley (Hordeum vulgare L.)

Spring radiation frost is a major abiotic stress in southern Australia, reducing yield potential and grain quality of barley by damaging sensitive reproductive organs in the latter stages of development. Field-based screening methods were developed, and genetic variation for reproductive frost toler...

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Bibliographic Details
Published in:	Theoretical and applied genetics Vol. 109; no. 6; pp. 1267 - 1274
Main Authors:	Reinheimer, J.L, Barr, A.R, Eglinton, J.K
Format:	Journal Article
Language:	English
Published:	Heidelberg Springer 01-10-2004 Berlin Springer Nature B.V
Subjects:	Acclimatization Barley Biological and medical sciences Chromosome Mapping Chromosomes Chromosomes, Plant - genetics Classical genetics, quantitative genetics, hybrids Cold Climate frost injury frost resistance Fundamental and applied biological sciences. Psychology Genetic Markers Genetic Variation Genetics of eukaryotes. Biological and molecular evolution Geography Hordeum - genetics Hordeum - growth & development Hordeum vulgare Ice inflorescences Legumes Methods, theories and miscellaneous Phenotype plant fertility Pteridophyta, spermatophyta Quantitative genetics Quantitative Trait Loci Reproduction Reproductive organs Vegetals Australia Japan Israel Genetic mapping Monocotyledones Hordeum vulgare Gramineae Quantitative character Angiospermae Genetics Spermatophyta Agriculture
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Summary:	Spring radiation frost is a major abiotic stress in southern Australia, reducing yield potential and grain quality of barley by damaging sensitive reproductive organs in the latter stages of development. Field-based screening methods were developed, and genetic variation for reproductive frost tolerance was identified. Mapping populations that were segregating for reproductive frost tolerance were screened and significant QTL identified. QTL on chromosome 2HL were identified for frost-induced floret sterility in two different populations at the same genomic location. This QTL was not associated with previously reported developmental or stress-response loci. QTL on chromosome 5HL were identified for frost-induced floret sterility and frost-induced grain damage in all three of the populations studied. The locations of QTL were coincident with previously reported vegetative frost tolerance loci close to the vrn-H1 locus. This locus on chromosome 5HL has now been associated with response to cold stress at both vegetative and reproductive developmental stages in barley. This study will allow reproductive frost tolerance to be seriously pursued as a breeding objective by facilitating a change from difficult phenotypic selection to high-throughput genotypic selection.
Bibliography:	ObjectType-Article-2 SourceType-Scholarly Journals-1 ObjectType-Feature-1 content type line 23 ObjectType-Article-1 ObjectType-Feature-2
ISSN:	0040-5752 1432-2242
DOI:	10.1007/s00122-004-1736-3