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조영찬,오명규,최임수,김연규,김명기,황흥구,홍하철,정오영,최인배,최용환,전용희,이정희,이정일,신영섭,김정주,김기종,백만기,노재환 한국육종학회 2009 한국육종학회지 Vol.41 No.4
Cheongcheongjinmi is a new japonica rice variety developed from a cross between Iri401 and Ilpumbyeo by the rice breeding team of National Institute of Crop Science, RDA. This variety is suitable for ordinary season culture of low level nitrogen application. Heading date of "Cheongcheongjinmi" is August 17, 4 days later than that of Sobibyeo in plain areas. It has culm length of 82 cm, and relatively semi-erect pubescent leaf blade and slightly tough culm tolerant to lodging with good canopy architecture. This variety has 13 tillers per hill, 126 spikelets per panicle and 90.2% of ripened grains. "Cheongcheongjinmi" showed lower spikelet fertility than Sobibyeo when exposed to cold stress. This variety showed slower leaf senescence and lower viviparous germination compared to Sobibyeo during the ripening stage. "Cheongcheongjinmi" is susceptible to blast disease, bacterial blight, virus diseases and planthoppers. The dried plant weight, total nitrogen and RuBisCO activity of "Cheongcheongjinmi" were higher than those of Sobibyeo in low level nitrogen application. The milled rice of "Cheongcheongjinmi" exhibits translucent, clear non-glutinous endosperm and medium short grain. It shows lower protein and amylose contents than those of Sobibyeo, and better palatability of cooked rice compared to Hwaseongbyeo. The milled rice yield of this cultivar is about 5.10 MT/ha at low level nitrogen application of ordinary season culture in local adaptability test for three years. Especially, "Cheongcheongjinmi" has better milling properties such as the percentage of whole grain in milled rice and milling recovery of whole grain, respectively than those of Sobibyeo. "Cheongcheongjinmi" would be adaptable to middle plain areas and middle-western coastal areas of Korea.
조영찬,이경준 한국데이터정보과학회 2023 한국데이터정보과학회지 Vol.34 No.3
In survival and reliability analysis, some units can be failed between two points of observation with exact times of failure of these units unobserved. Therefore, progressive censoring scheme was introduced. Also, the problem of examining how well a assumed distribution fits the data of a sample is of significant that has to be examined prior to any inferential process. Therefor, we derives an maximum likelihood estimator of the parameters of inverse Weibull distribution. And we introduced the goodness-of-fit test statistics and carried out Monte Carlo simulation to compare the proposed test statistics. In addition, real data set have been analyzed. 중도절단 자료의 발생의 원인 중 하나로 관측원의 실수 또는 기계상의 오류를 들 수 있다. 점진적 중도절단은 이러한 관측원의 실수 또는 기계상의 오류를 고려하기 위하여 제안되었다. 또한 통계적 추론에 있어서 자료가 어떠한 분포의 형태를 띄는지 자료의 분포를 검정하는 것은 매우 중요한 일이다. 따라서 본 논문에서는 역와이블분포의 최대우도추정량을 점진적 중도절단 상황에서 계산하고 적합도 검정통계량들 (순서통계량을 이용한 방법과 로렌츠 곡선을 이용한 방법)을 제안하였다. 모의실험을 통하여 본 논문에서 제안한 적합도 검정통계량들 (순서통계량을 이용한 방법과 로렌츠 곡선을 이용한 방법)을 비교하여 우수한 적합도 검정통계량을 확인하였다. 또한, 제안한 적합도 검정통계량을 실제 사례 자료에 적용하여 결과를 비교하였다.
Mapping of Quantitative Resistance Genes to Leaf Blast in a Japonica Rice Cultivar, Suweon365
조영찬,백만기,서정필,권수진,최수임,김연규,한성숙,최해춘,황흥구 한국육종학회 2004 한국육종학회지 Vol.36 No.3
The elite rice cultivar, Suweon365, shows high level of leaf blast resistance. The number and chromosomal locations of genes conferring the resistance were detected by linkage analysis using DNA markers in the RILs from the cross between Suweon365 and Chucheongbyeo. Partial resistance to leaf blast was assessed in upland blast nursery in three regions for QTL analysis. Resistance to two isolates was measured by the number and size of susceptible lesion, and diseased leaf area (% DLA). Eleven QTLs to blast in nursery test at three regions and eleven and eight QTLs to the number and size of susceptible lesion, and DLA to isolates 90-054 and 91-016 were detected, respectively. A total of eighteen QTLs were identified on the regions of major genes, Pib, Pi18, and Pi25(t) in Suweon365. Most of them were acted as major QTLs explaining over 10% of phenotypic variation. A QTL responsible for field blast resistance was detected at the same location as that of upland rice on chromosome 4.