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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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A new rice cultivar “Keumo 3” was developed for adopting under double cropping system with after or before cash
crop cultivation. It was selected from the cross-combination between YR17202 F2/Shinkeumobyeo//YR15727-B-B-B-102. The parent,
YR17202 F2 individual plant, was used for tolerance to lodging, it derived from a cross between Nonganbyeo/Shinkeumobyeo.
Nonganbyeo is well known to lodging tolerance cultivar, as well as biotic stress, because it was developed by crossing with
Tongil type. And the YR15727-B-B-B-102 line used as another parent with short growth duration, likewise highly resistance to
rice blast disease. The pedigree derived from the cross-combination YR17202 F2/Shinkeumobyeo//YR15727-B-B-B-102 were
generated to F7, and a best line among them named as Milyang 201. After a series of yield trials, including local adaptability
test conducted throughout the peninsular of Korea, Milyang 201 was registered with the name of “Keumo 3” in 2005. The cultivar
belongs to a early maturing group and heads 4 days earlier than Keumobyeo, a standard cultivar. It has short culm, and less
spikelet number per panicle than Keumobyeo. However, its milled rice yield grown under extremely late transplanting time, 10.
July, over the 3 local sites for 2003-2005 years, averaged 4,48 MT/ha, which is 6% higher than the standard, Keumobyeo.
“Keumo 3” has showed a durable resistance to leaf blast disease during fourteen blast nurseries screening covered from south
to north in Korea for 2003-2007 years. And it was confirmed harbours pi-zt, a durable blast resistance gene. Moreover it was
incompatible with 19 blast isolates under artificial inoculation, except one isolate, K1101. Additionally, “Keumo 3” exhibits
resistance to K1, K2 and K3 of bacterial blight pathogen, as well as strip virus disease resistance, and moderate resistance to dwarf
virus disease. Consequently, the new rice cultivar “Keumo 3” would be well adopted where a bio stress makes a big problem
annually.
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