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학술연구/단체지원/교육 등 연구자 활동을 지속하도록 DBpia가 지원하고 있어요.
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연구자들이 자신의 연구와 전문성을 널리 알리고, 새로운 협력의 기회를 만들 수 있는 네트워킹 공간이에요.
초록· 키워드
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In the previous study, 141 BC3F2 lines from a cross between the Oryza sativa cv. Milyang 23 and O. glaberrima were used to identify favorable wild QTL alleles for yield component traits. In this study, we carried out QTL analysis of four grain morphology as well as four yield component traits using 141 BC3F5 lines from the same cross and compared QTLs detected in two different generations. The mean number of O. glaberrima segments in the 141 BC3F5 lines ranged from 1 to 13 with 2.69 and 5.71 of the average means of homozygous and heterozygous segments, respectively. There was a three-fold difference in the number of QTLs detected for four traits commonly evaluated in two generations (seven QTLs in the BC3F5 vs 21 in the BC3F2 population). The percentages of the phenotypic variance explained by QTLs in the BC3F5 population were similar to or less than those in the BC3F2 population. This is probably due to the difference in the genetic composition of two populations and the environmental effects. The locations of the QTLs commonly detected in both generations were in good agreement except for one QTL for spikelets per panicle. The yield QTL, yd3 was colocalized with the spikelets per panicle, spp3. Yield increase at this locus is due to the increase in spikelets per panicle, because both traits were associated with increase in spikelets per panicle and yield due to the presence of an O. glaberrima allele. Clusters of QTLs for grain morphology traits were observed in two chromosome regions. One cluster harboring five QTLs near SSR markers RM106 and RM263 was detected on chromosome 2. This population would serve as a foundation for development of the introgression line population from a cross between Milyang 23 and O. glaberrima.
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참고문헌 (20)
참고문헌 신청
Aluko G / 2004 / QTL mapping of grain quality traits from the interspecific cross Oryza sativa × O. glaberrima / Theor Appl Genet 109 : 630 ~ 639
Basten CJ / 1997 / 1997: QTL Cartographer: a Reference Manual and Tutorial for QTL Mapping / Department of Statistics, North Carolina State University, Raleigh, NC, USA
Cai HW / 2002 / QTL clusters reflect character associations in wild and cultivated rice / Theor Appl Genet 104 : 1217 ~ 1228
Causse MA / 1994 / Saturated molecular map of the rice enome based on an interspecific backcross population / Genetics 38 : 1251 ~ 1274
Doi K / 1998 / RFLP mapping and QTL analysis of heading date and pollen sterility using backcross populations between Oryza sativa L. and Oryza glaberrima Sted / Breeding Sci
Basten CJ / 1997 / 1997: QTL Cartographer: a Reference Manual and Tutorial for QTL Mapping / Department of Statistics, North Carolina State University, Raleigh, NC, USA
Cai HW / 2002 / QTL clusters reflect character associations in wild and cultivated rice / Theor Appl Genet 104 : 1217 ~ 1228
Causse MA / 1994 / Saturated molecular map of the rice enome based on an interspecific backcross population / Genetics 38 : 1251 ~ 1274
Doi K / 1998 / RFLP mapping and QTL analysis of heading date and pollen sterility using backcross populations between Oryza sativa L. and Oryza glaberrima Sted / Breeding Sci
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