RFLP Linkage Map included the Information of Segregation Distortion in a Wide-Cross Population between Indica and Japonica Rice : Oryza sativa L.
スポンサーリンク
概要
- 論文の詳細を見る
A new rice (Oryza sativa L.) linkage map of DNA markers was developed using 119 restriction fragment length polymorphism (RFLP) markers in 202 F_2 progeny derived from a cross between a Korean variety, Milyang 23, and a Japanese variety, Akihikari which belonged to cv.gr.Indica and cv.gr.Japonica, respectively. The F_2 linkage map covered a total distance of 1335 cM on the 12 rice chromosomes. Non-polymorphic markers were recognized continuously on the distal region of the short arm of chromosome 5 at a length of 30 cM, which was not covered by RFLP analysis. The orientation, chromosome number of these 12 linkage groups and positions of centromere were determined and assigned to their respective chromosomes, as described by Harushima et at.(1998). In the F_2 population, segregation distortions were detected in a total of 16 chromosome regions except for chromosomes 1 and 4. Among them, ten and four chromosome regions showed an increased number of progeny with genotypes of Indica and Japonica homozygotic alleles, respectively. Two other regions showed an increase in Indica/Japonica heterozygotes. Skew in favor of Indica alleles was recognized on chromosomes 2 and 3 (two regions); 5, 6, 9 and 11 (two regions); and 12 (two regions), and that of Japonica on chromosomes 7, 8 and 10 (two regions). An increase of heterozygote was detected on chromosomes 2 and 9. Such segregation distortions may be due to reproductive barriers, i.e., hybrid sterility, gametophyte genes and hybrid weakness. Such information on segregation distortions is valuable for in wide hybridization breeding between Indica and Japonica varieties. The F_2 population, RFLP segregation data and the linkage map including the information of distortion should be useful for genetic analysis of agricultural traits related to the yield component and for planning breeding programs considering the segregation distortions. This study will be a starting point for the QTL analysis for agronomic traits and molecular breeding for high yield using DNA markers.
- 日本育種学会の論文
著者
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Fukuta Yoshimichi
Japan International Research Center for Agricultural Sciences
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Fukuta Yoshimichi
Hokuriku National Agricultural Experiment Station:international Rice Research Institute Mcpo
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Fukuta Yoshimichi
国際イネ研究所:国際農林業研究センター
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Fukuta Yoshimichi
Hokuriku National Agricultural Experiment Station Maff
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Tamura Katsunori
Hokuriku National Agricultural Experiment Station
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Sasahara Hideki
Faculty of Agriculture, Niigata University
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Fukuyama Toshinori
Faculty of Agriculture, Niigata University
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Sasahara Hideki
Faculty Of Agriculture Niigata University
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Fukuyama Toshinori
Faculty Of Agriculture Niigata University
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Fukuta Yoshimich
Hokuriku National Agricultural Experiment Station
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Fukuta Yoshimichi
Hokuriku National Agricultural Experiment Station
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- Application of AFLP Technique That Uses Non-radioactive Fluorescent Primers to the Detection of Genetic Diversity in Japanese Rice Cultivars and Cloning of DNA Sequences Derived from an Indica Genome
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- RFLP Linkage Map included the Information of Segregation Distortion in a Wide-Cross Population between Indica and Japonica Rice : Oryza sativa L.
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