Julapark Chunwongse

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A molecular map has been constructed for the rice genome comprised of 726 markers (mainly restriction fragment length polymorphisms; RFLPs). The mapping population was derived from a backcross between cultivated rice, Oryza sativa, and its wild African relative, Oryza longistaminata. The very high level of polymorphism between these species, combined with(More)
The Pto gene in tomato confers resistance to races of Pseudomonas syringae pv. tomato that carry the avirulence gene avrPto. A yeast artificial chromosome clone that spans the Pto region was identified and used to probe a leaf complementary DNA (cDNA) library. A cDNA clone was isolated that represents a gene family, at least six members of which genetically(More)
T he extraction of DNA from plant tissue is a critical and often very time-consuming step in many plant molecular biology procedures. This is especially true for studies of molecular genetics, QTLs, or molecular-marker-based breeding where hundreds or even thousands of plant samples need to be analyzed in a short period of time. Many protocols are laborious(More)
The c o m p l e t e n u c i e o t i d e sequence [155 ,844 bp) o f t o b a c c o ( N i c o t i a n a tabecum v a r . B r i g h t y e l l o w 4) c h l o r o p l a s t DNA [ S h i n o z a k i e t e l . 1986) is p r e s e n t e d . The c i r c u l a r DNA [see F ig . 1) i8 i nea r zed by c u t t i n g a t the j u n c t i o n JLA between IR A and LSC JLA is d e(More)
Leaves of tomato cultivars that contain the Pto bacterial resistance locus develop small necrotic lesions within 24 hr after exposure to fenthion, an organophosphorous insecticide. Recently, the Pto gene was isolated and shown to be a putative serine/threonine protein kinase. Pto is one member of a multigene family that is clustered within a 400-kb region(More)
Expression of the psbB gene cluster in tobacco chloroplasts has been studied. This cluster contains the genes for the 51 kDa chlorophyll a apoprotein (psbB) and the 10 kDa phosphoprotein (psbH) of photosystem II, and cytochrome b6 (petB) and subunit IV (PetD) of the cytochrome b/f complex in this order. Northern blot hybridization and reverse transcription(More)
A simple and rapid PCR-based method has been developed for determining the genotype of seeds before germination. Single half-seeds of rice (Oryza sativa L.) and wheat (Triticum aestivum L. em. Thell.) were preincubated, without grinding, in an aqueous extraction buffer. The resulting supernatants were then used in polymerase chain reaction (PCR) with(More)
We report the tagging of a powdery mildew [Leveillula taurica (Lév.) Arnaud.] resistance gene (Lv) in tomato using RAPD and RFLP markers. DNA from a resistant (cv Laurica) and a susceptible cultivar were screened with 300 random primers that were used to amplify DNA of resistant and susceptible plants. Four primers yielded fragments that were unique to the(More)
Association mapping relies on the variation and extent of linkage disequilibrium within a species to identify genes of interest; this is an alternative to linkage mapping in traditional biparental population, which exploits only the variation in the two parents of the mapping population. This study was designed to identify association between 48 SSR markers(More)
DNA sequencing has revealed a long open reading frame (ORF) in the large single-copy region of tobacco chloroplast DNA. This ORF consists of 1070 codons and its deduced amino acid sequence shows about 39% homology to that of the beta-subunit of E. coli RNA polymerase. This finding raises a possibility that some of the chloroplast RNA polymerase subunits are(More)