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- Title
Variation ofWxmicrosatellite allele, waxy allele distribution and differentiation of chloroplast DNA in a collection of Thai rice (Oryza sativaL.).
- Authors
Prathepha, Preecha; Baimai, Visut
- Abstract
Eighty-two varieties of rice from different regions in Thailand were selected to explore theWaxy(Wx)gene diversity andindica-japonicadifferentiation of chloroplast DNA. A comparison of the 5’ splice site in the first intron was made between glutinous and nonglutinous rice. It revealed that non-glutinous with low-amylose content and glutinous rice were characterized as theWx b allele based on the G-to-T base substitution, whereas non-glutinous rice with intermediate and high amylose carried theWx a allele. FourWxmicrosatellite alleles, (CT) n repeat, (n = 16,17,18 and 19) were found in glutinous rice. In contrast, non-glutinous rice showed five Wx microsatellite alleles (n = 11, 16, 17, 18 and 19). The (CT)17 allele was prominent allele in Thai population, while the (CT)11 allele was found only in intermediate and high amylose rice varieties from southern Thailand. Almost all of upland rice grown by various ethnic groups in northern Thailand were characterized asjaponicatype based on their having thePstI-12fragment in their cpDNA, whereas most of rainfed lowland varieties from other regions of Thailand wereindica. This exploration of DNA-based genetic markers is important, as it enhances our ability to describe and manipulate sources of genetic variation for rice breeding programs.
- Subjects
THAILAND; RICE; MICROSATELLITE repeats; CHLOROPLAST DNA; PLANT genetics; INTRONS
- Publication
Euphytica, 2005, Vol 140, Issue 3, p231
- ISSN
0014-2336
- Publication type
Article
- DOI
10.1007/s10681-004-3783-x