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LiteratureArticle Details
PMID: 19706531
Published · ppublish
English
Journal Article
Research Support, Non-U.S. Gov't
Research Support, U.S. Gov't, Non-P.H.S.
The origin and evolution of fragrance in rice (Oryza sativa L.).
Proceedings of the National Academy of Sciences of the United States of America
·Vol. 106
·No. 34
·2009-08-25
·Pages 14444-9
Abstract
Fragrance in the grain is one of the most highly valued grain quality traits in rice, yet the origin and evolution of the betaine aldehyde dehydrogenase gene (BADH2) underlying this trait remains unclear. In this study, we identify eight putatively nonfunctional alleles of the BADH2 gene and show that these alleles have distinct geographic and genetic origins. Despite multiple origins of the fragrance trait, a single allele, badh2.1, is the predominant allele in virtually all fragrant rice varieties today, including the widely recognized Basmati and Jasmine types. Haplotype analysis allowed us to establish a single origin of the badh2.1 allele within the Japonica varietal group and demonstrate the introgression of this allele from Japonica to Indica. Basmati-like accessions were nearly identical to the ancestral Japonica haplotype across a 5.3-Mb region flanking BADH2 regardless of their fragrance phenotype, demonstrating a close evolutionary relationship between Basmati varieties and the Japonica gene pool. These results clarify the relationships among fragrant rice varieties and challenge the traditional assumption that the fragrance trait arose in the Indica varietal group.
MeSH Terms
Alleles
Base Sequence
Betaine-Aldehyde Dehydrogenase/genetics,metabolism
Evolution, Molecular
Gene Frequency
Genetic Variation
Geography
Haplotypes
Molecular Sequence Data
Mutation
Odorants
Oryza/classification,enzymology,genetics
Phylogeny
Plant Proteins/genetics,metabolism
Sequence Homology, Nucleic Acid
Chemicals
Plant Proteins
Betaine-Aldehyde Dehydrogenase
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Article Info
Journal
Proceedings of the National Academy of Sciences of the United States of America
Abbr.
Proc Natl Acad Sci U S A
ISSN
1091-6490
Published
2009-08-25
Epub
2009-00-17
Pages
14444-9
Language
English
Region
United States
NLM ID
7505876
PMCID
PMC2732888
Subset
IM
Databases
GENBANK
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