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- 저자 : ( Home Regina Wacera ) (검색결과 2 건)
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( Home Regina Wacera ),( Hyun Suk Lee ),( Kyung Min Kim ) 한국육종학회 2016 Plant Breeding and Biotechnology Vol.4 No.2
We performed a molecular marker-based analysis of quantitative trait loci (QTLs) for the traits that determine appearance quality of the grains using 120 double haploid (DH) lines developed by anther culture from F1 hybrid of a cross between Cheongcheong (Oryza sativa L. ssp. Indica) and Nagdong (Oryza sativa L. ssp. Japonica). The traits studied included grain length, grain width, grain thickness, length to width ration and thousand grain weight. This experiment was conducted with two replications of 2013 and 2014. A linkage map with 217 DNA markers was constructed spanning across 2,067.1 centiMorgans (cM) at an average interval of 9.5 cM between markers and covering 12 rice chromosomes. Interval mapping procedure was used to identify the QTLs controlling five grain traits and QTLs detected were further confirmed using composite interval mapping. A total of 24 QTLs affecting grain appearances were identified and mapped on all the twelve chromosomes for 2 years at grain quality. Nine of the 24 QTLs were reproducibly detected in two year trials. Major QTL for grain length was detected on chromosome 5 in 2013 with a phenotypic variation of 64% and chromosome 7 in 2014 that explained 55% of the phenotypic variation. The QTL findings in this study will in future faciltate the gene isolation and breeding application for improvement of rice grain shape and yield.
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Genetic Mapping of QTLs that Control Grain Characteristics in Rice (Oryza sativa L.)
Home Regina Wacera(홈레지나와세라),Fika Ayu Safitri(피카아유사피트리),Hyun-Suk Lee(이현숙),Byung-Wook Yun(윤병욱),Kyung-Min Kim(김경민) 한국생명과학회 2015 생명과학회지 Vol.25 No.8
미립 품질 향상을 위하여 미립 형태를 결정하는 특성을 위한 분자육종기술을 확립하기 위하여 미립과 관련된 양적형질 유전자좌를 탐색하고, 이들 환경요인과 상호작용 효과를 분석한 결과는 다음과 같다. 인디카 품종인 ‘청청’과 자포니카형인 ‘낙동’이 교배된 조합 F1의 약배양에 의해 양성된 120 계통(DH 집단)과 217개의 DNA 마커를 이용하여 전체 길이가 2,067cM이고, 마커간 평균거리가 9.5cM인 유전자 지도를 작성하였다. 미립형태 관련 유전자좌 분석에서 미립의 외형인 길이, 폭, 두께, 장폭비, 천립중과 관련하여 14개의 QTL이 탐색되었다. 현미의 미립길이 관련 3개의 QTL (qGL2, qGL5, qGL7), 미립 폭 관련 3개의 QTL (qGW2-1, qGW2-2, qGW2-3), 미립 두께관련 1개의 QTL (qGT2), 장폭비 관련 6개의 QTL (qLWR2-1, qLWR2-2, qLWR2-3, qLWR2-4, qLWR7, qLWR12) 및 천립중 관련 1개의 QTL (qTGW8)이 선발되었다. 미립 장폭비 관련 4개의 QTL은 미립길이와 미립두께에서 동일한 염색체 상에서 확인되었다. 본 연구에서 구명된 QTL 마커들은 쌀 품종개량을 위하여 이용될 수 있을 것이라 판단된다. We performed a molecular marker-based analysis of quantitative trait loci (QTLs) for traits that determine the quality of the appearance of grains, using 120 doubled-haploid (DH) lines developed by another culture from the F1 cross between ‘Cheongcheong’ (Oryza sativa L. ssp. Indica) and ‘Nagdong’ (Oryza sativa L. ssp. Japonica). The traits studied included length, width, and thickness of the grains, as well as length-to-width ratio and 1,000-grain weight. The objective of this study was to determine the genetic control of these traits in order to formulate a strategy for improving the appearance of this hybrid. Within the DH population, five traits exhibited wide variation, with mean values occurring within the range of the two parents. Three QTLs were identified for grain length on chromosomes 2, 5, and 7. Three QTLs were mapped for grain width on chromosome 2: qGW2-1, qGW2-2, and qGW2-3. Six chromosomes were identified for the grain length-to-width ratio; four of these were on chromosome 2, whereas the other two were on chromosomes 7 and 12. One QTL influencing 1,000-grain weight was identified and located on chromosome 8. The results presented in the present study should facilitate rice-breeding, especially for improved hybrid-rice quality.
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