지원사업
학술연구/단체지원/교육 등 연구자 활동을 지속하도록 DBpia가 지원하고 있어요.
커뮤니티
연구자들이 자신의 연구와 전문성을 널리 알리고, 새로운 협력의 기회를 만들 수 있는 네트워킹 공간이에요.
초록· 키워드
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In direct-seeding cultivation of rice, the emergence and establishment of seedlings are important for determining the actual yield. These traits depend principally upon elongation of both the mesocotyl and coleoptile. Mesocotyl elongation in rice is controlled by several genetic factors and is also affected by environmental factors. In this study, we mapped QTL for mesocotyl elongation using F8 lines from a cross between the cultivated rice, Ilpumbyeo and a weedy rice, PBR. One of the Korean weedy rice, PBR showed the long mesocotyl length than that of cultivars, Ilpumebyeo under soil and agar media conditions. This weedy rice showed long mesocotyl than the elite japonica cultivars. After a phenotyping of 150 F7 lines for mesocotyl length, a subset of 20 lines selected from the two extreme phenotypic tails was used for the bulked segregant analysis. Two QTL were identified on chromosomes 1 and 3. These two QTL were confirmed using 120 F8 lines. Two QTL, qMel-1 and qMel-3 on chromosomes 1 and 3 accounted for 37.3% and 6.5% of the phenotypic variance, respectively. The PBR alleles were associated with an increase in mesocotyl elongation at both loci. It is noteworthy that two QTL for mesocotyl elongation were colocalized with the QTL for mesocotyl length reported in the previous QTL reports. These QTLs can be introgressed into cultivar background using marker assisted backcrossing in an effort to enhance the level of mesocotyl elongation.
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참고문헌 (25)
참고문헌 신청
Bewley JD / 1994 / Seeds; Physiology of development and germination, 2nd edition / Plenum Press : 274 ~ 279
Cai HW / 2002 / QTL clusters reflect character associations in wild and cultivated rice / Theor. Appl. Genet 104 : 1217 ~ 1228
Cao L-Y / 2002 / Mapping QTLs with epistasis for mesocotyl length in a DH population from indica-japonica cross of rice (Oryza sativa) / Chinese J. Rice Sci 16 : 221 ~ 224
Causse MA / 1994 / Saturated molecular map of the rice genome based on an interspecific backcross population / Genetics 138 : 1251 ~ 1274
Dilday RH / 1990 / Plant height vs. mesocotyl and coleoptile elongation in rice: Linkage or pleiotropism? / Crop Sci 30 : 815 ~ 818
Cai HW / 2002 / QTL clusters reflect character associations in wild and cultivated rice / Theor. Appl. Genet 104 : 1217 ~ 1228
Cao L-Y / 2002 / Mapping QTLs with epistasis for mesocotyl length in a DH population from indica-japonica cross of rice (Oryza sativa) / Chinese J. Rice Sci 16 : 221 ~ 224
Causse MA / 1994 / Saturated molecular map of the rice genome based on an interspecific backcross population / Genetics 138 : 1251 ~ 1274
Dilday RH / 1990 / Plant height vs. mesocotyl and coleoptile elongation in rice: Linkage or pleiotropism? / Crop Sci 30 : 815 ~ 818
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