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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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Temperate japonica is used as the parent for crossing in the breeding of new rice cultivars in Korea, and the grain shape of thedeveloped lines or cultivars is a semi-round and medium-short grain length. To overcome the current low quantity of japonica cultivar germplasmand deterioration in quality caused by climate change, it is necessary to diversify the grain characteristics of japonica. Most of the UnitedStates (US) cultivars are classified as medium, long, extra-long, and half spindle- and spindle-shaped grains. The qSW5 allelotype, a majorgene involved in grain width, is found in all US cultivars. In addition, the US cultivar ‘Saber’ has both qgl3 and GS3_B alleles, which havelow allele frequencies among Korean rice cultivars, and ‘A020’ had gw8, an allele with a reduced grain width. The pasting properties andtexture of medium-grain length and half-spindle-shaped cultivars were relatively similar to those of the Korean rice cultivar, but differentfrom those of long-grain and long spindle-shaped cultivars. Therefore, grain shape is associated with pasting properties and texture traits.
Among the rice cultivars in the US, tropical japonica belongs to the same japonica as the Korean rice cultivar; however, its grain shapeis similar to that of indica. As grain shape is also related to grain quality, US cultivars can be used as a useful genetic resource for diversifyingthe grain characteristics of Korean japonica cultivars and breeding new cultivars.
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