Genetic and Phenotypic Analysis of lax1-6, a Mutant Allele of LAX PANICLE1 in Rice

Title
Genetic and Phenotypic Analysis of lax1-6, a Mutant Allele of LAX PANICLE1 in Rice
Author(s)
강상구누룰마틴[누룰마틴]
Keywords
MADS-BOX GENE; SPIKELET MERISTEM IDENTITY; AMINO-ACID SUBSTITUTION; GENOME-WIDE ANALYSIS; ORYZA-SATIVA L.; FLOWER DEVELOPMENT; TRANSCRIPTION FACTOR; FRIZZY-PANICLE; INFLORESCENCE ARCHITECTURE; MOLECULAR CHARACTERIZATION
Issue Date
201110
Publisher
SPRINGER HEIDELBERG
Citation
JOURNAL OF PLANT BIOLOGY, v.55, no.1, pp.50 - 63
Abstract
Proper function of the LAX1 gene is required for the development of axillary meristem in rice. Here, we report genetic and phenotypic characters of a novel recessive mutant allele of rice LAX1 gene, lax1-6, which showed abnormal panicle phenotypes with few numbers of elongated primary rachis branches. Beside typical lax mutant phenotype, abnormalities of lax1-6 mutant allele were observed with defect lemma and palea primordial in floral organs. The lax1-6 mutant locus was linked between SSR markers RM7594 and RM5389 on chromosome 1 with 1.02% and 1.0% recombination frequencies, respectively. Molecular analysis revealed that the lax1-6 mutant allele was caused by a transversion mutation of nucleotide T to G substitution that resulted in an amino acid substitution from serine (S) to alanine (A) at the 117(th) position from amino terminus of a basic helix-loop-helix protein coded by LAX1 gene. Furthermore, we found that the Oryza sativa indica type cv. IRRI347 contained 24 nucleotide deletion in the upstream sequence in the LAX1 gene, but this deletion did not influence panicle morphology, which demonstrated that the deletion is a polymorphism in rice. All together, the lax1-6 mutant is a newly identified allele of LAX1 gene displaying the abnormal axillary meristems and inflorescences in rice.
URI
http://hdl.handle.net/YU.REPOSITORY/24420http://dx.doi.org/10.1007/s12374-011-9189-0
ISSN
1226-9239
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생명공학부 > 생명공학부 > Articles
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