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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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Rice panicle architecture is an important factor affecting yield potential. Korean rice cultivars have a narrow genetic background for panicle architecture. To enhance the yield potential of Korean rice cultivars, we developed and characterized rice lines with new panicle architecture. Rice with improved panicle architecture has clustered spikelets and dense panicles (CD type). CD rice was derived from a cross between “Binhae Col.#1” carrying dense panicles, and “ARC10319” that has the clustered spikelets gene (Cl). CD rice lines had short and semi-erect panicles with two to five high density spikelets clustered at the tips of primary and secondary rachis branches. CD rice lines had dramatically increased numbers of spikelets; almost twice as many as those of Korean rice cultivars. The increase in spikelet number was mainly caused by the increased spikelets and branches on secondary rachises compared to those on primary rachises. The increase in spikelet number was expected to enhance the yield of CD rice by expanding sink capacity. However, the yield of selected lines; CD9, CD27, CD34, and CD39, did not reach the level of the Korean high-yielding cultivars “Boramchan” and “Hanareum2,” due to the reduction in panicle number and grain weight, and poor ripening. Although no substantial yield increase was observed in CD rice, the panicle architecture of CD rice, clustered spikelets, and dense panicles could be new genetic resources as breeding material for diversifying panicle architecture and enhancing yield potential.
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참고문헌 (24)
참고문헌 신청
Chung GS / 1980 / Innovative approaches to rice breeding / International Rice Research Institute :135~152
Futsuhara Y / 1979 / Genetical studies on dense and lax panicles in rice: I. Character expression and mode of lax panicle rice / Jpn J Beed 29:151~158
Hirota O / 1990 / Sink activity estimation by sink size and dry matter increase during the ripening stage of barley (Hordeum vulgare) and rice (Oryza sativa) / Ann Bot 65:349~353
Huang X / 2009 / Natural variation at the DEP1 locus enhances grain yield in rice / Nature Genet 41:494
Khush GS / 1999 / Green revolution: preparing for the 21st century / Genome 42:646~655
Futsuhara Y / 1979 / Genetical studies on dense and lax panicles in rice: I. Character expression and mode of lax panicle rice / Jpn J Beed 29:151~158
Hirota O / 1990 / Sink activity estimation by sink size and dry matter increase during the ripening stage of barley (Hordeum vulgare) and rice (Oryza sativa) / Ann Bot 65:349~353
Huang X / 2009 / Natural variation at the DEP1 locus enhances grain yield in rice / Nature Genet 41:494
Khush GS / 1999 / Green revolution: preparing for the 21st century / Genome 42:646~655
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