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Ki Young Kim,Mun Sik Shin,Woo Jae Kim,Hyun Su Park,Jong Cheol Ko,Jeong Kwon Nam,Woon Chul Shin,Young Jun Mo,Ji Ung Jeung,Bo Kyeong Kim,Jae Kwon Ko 한국육종학회 2011 한국육종학회지 Vol.43 No.5
Near-isogenic lines (NILs) carrying bacterial blight resistance genes (Xa4, xa5 and Xa21) were developed in japonica rice using Suweon345 as genetic background. NILs were selected by gene specific DNA markers and inoculation of K1 or K3a race. NILs conferring Xa4 were resistant to K1, K2, K3, and moderately resistant to K3a. NILs conferring xa5 were resistant to K1, K2, K3, and K3a. NILs having Xa21 were susceptible to K1, while resistant to K2, K3 and K3a. Target genes of NILs with the genetic background of Suweon345 were also confirmed by using eleven Philippines races and International Rice Bacterial Blight (IRBB) NILs carrying Xa4, xa5 and Xa21. All NILs had no significant difference from their recurrent parents in the major agronomic traits except for panicle length and brown rice 1,000 grain weight. Heading date of NILs ranged from Aug. 10 to Aug. 11, which was similar to that of recurrent parent, Suweon345. Culm length, number of grains per panicle and ratio of ripened grain of NILs were similar to those of Suweon345. Milled rice of NILs was ranged from 4.82 to 4.93MT/ha. These NILs will be useful for improving resistance to K3a race of bacterial blight pathogens in Korean japonica cultivars.
Young-Jun Mo,Ki-Young Kim,Woon-Chul Shin,Jeong-Kwon Nam,Jong-Cheol Ko,Mun-Sik Shin,Bo-Kyeong Kim,Jae-Kwon Ko 한국작물학회 2010 한국작물학회 학술발표대회 논문집 Vol.2010 No.04
A total of 40 Korean rice cultivars were exposed to high temperature during grain filling stage in the greenhouse condition and changes in head rice ratio of brown rice, whiteness of milled rice, amylose and protein contents were investigated in comparison with field-grown plants. Testing cultivars were categorized into four groups according to maturation period and accumulated temperature was 1216.4~1775.8oC in the field condition and 1275.8~ 1893.7oC in the greenhouse condition during grain filling stage. Reduction ratio of head rice and whiteness under high temperature in the four groups were 23.6, 17.7, 13.0, 8.7% and 12.7, 12.3, 9.5, 6.0%, respectively, in which early-maturing group showed more severe deterioration due to the early exposure to high temperature. Rice cultivar Dongan and Daeya were the most tolerant to high temperature among the tested cultivars showing 0.5 and 6.6% of the head rice reduction ratio and 0 and 1.2% of whiteness reduction ratio under high temperature, respectively. Amylose contents of the four groups were reduced by 11.7, 11.3, 8.8, 8.5% under high temperature in group Ⅰ, Ⅱ, Ⅲ, Ⅳ, respectively, whereas protein contents were increased by 14.2, 6.3, 4.4, 4.4% in the four groups, respectively.
Young-Jun Mo,Ki-Young Kim,Woon-Chul Shin,Jeong-Kwon Nam,Jong-Cheol Ko,Mun-Sik Shin,Bo-Kyeong Kim,Jae-Kwon Ko 한국작물학회 2010 한국작물학회 학술발표대회 논문집 Vol.2010 No.04
Temperature rise during grain filling stage by global warming causes deterioration in rice yield and quality. This study was conducted to investigate proper panicle traits for improving grain filling under high temperature. A total of 40 Korean rice cultivars were grouped according to maturation period and exposed to high temperature during grain filling stage in greenhouse with ventilating fans. Average temperature in greenhouse was 1.1~1.5oC higher than ambient condition. Main panicle traits such as number of spikelets per panicle, number of primary rachis branches(PRBs) and secondary rachis branches(SRBs) per panicle, number of spikelets setting on PRBs and SRBs were counted after harvest and their relationship with grain ripened ratio was investigated. Grain ripened ratio under high temperature showed significant negative correlations with number of spikelets per panicle, number of total rachis branches, number of SRBs, number of total and average spikelets setting on SRBs, and ratio of number of SRBs to number of PRBs. Especially, number of total and average spikelets setting on SRBs showed highly negative correlations with ripened grain ratio, which implies grain filling under high temperature might have been more severely decreased in the cultivars with bigger sink size due to higher number of spikelets setting on SRBs.
백남현 ( Nam Hyun Back ),고종철 ( Jong Cheol Ko ),남정권 ( Jeong Kwon Nam ),최민규 ( Min Kyu Choi ),김보경 ( Bo Kyeong Kim ),양창휴 ( Chang Hyu Yang ),김택겸 ( Teak Kyum Kim ),김선 ( Sun Kim ),모영준 ( Young Jun Mo ),이경보 ( Kyo 한국국제농업개발학회 2011 韓國國際農業開發學會誌 Vol.23 No.4
This study was conducted to estimate the adaptability of some rice varieties for wet flooded direct seeding. Characters such as seedling stand, lodging index and milled rice yield are very important factors in order to get stable yield in direct seeding. These characters were compared among the 17 varieties which belong to early, medium, and mid-late maturity groups. Donganbyeo, Hoanbyeo, and Dongjinbyeo showed over 80 percent of seedling stand. Lodging did not occur in Daesanbyeo, Donganbyeo, Geumnambyeo, Ansanbyeo, Juanbyeo, Anjungbyeo, Hwanambyeo, and Obongbyeo. On the other hand, Geumobyeo, Hwayeongbyeo, Dongjinbyeo, and Nagdongbyeo showed severe lodging. The numbers of panicles and spikelets per in early maturing varieties were lower than those in medium and mid-late maturing varieties. There was no difference among medium and mid-late maturing varieties in the ratio of ripened grain. Milled rice yield was not different in medium or mid-late maturing varieties, whille in early maturing varieties it was different from 0.79 to 0.85MT/ha which was lower than in medium or mid-late maturing varieties. Consequently, Donganbyeo, Daesanbyeo and Hoanbyeo was desirable for wet flooded direct seeding in consideration of seedling stand, lodging and yield.
Development of BPH Resistant Rice Variety for Environmental Friendly Cultivation
Woon-Chul Shin,Ki-Young Kim,Jong-Cheol Ko,Young-Jun Mo,Jeong-Kwon Nam,Mun-Sik Shin,Bo-Kyeong Kim,Jae-Kwon Ko 한국작물학회 2010 한국작물학회 학술발표대회 논문집 Vol.2010 No.04
BPH(Brown planthopper, Nilaparvata lugens Stål) is a major insect of rice and give a lot of damages around Korea, Japan and East-West Asia. BPH often causes heavy losses of up to 60% of rice crop yields in susceptible cultivars. Especially, increase of the environmental friendly cultivation in South Korea has caused the outbreak of BPH rapidly. But few resistant varieties in Korea have known until now. Utilization of R genes in breeding programs has been the most effective and economical strategy for controlling insect resistance. It is reported that Bph1 gene is located on a long side of chromosome 12 and linked to bph2 among reported 18 R genes. BPH resistant "Iksan529" was derived from a cross between HR22538-GHB-36-4(bph2) and Iksan471 at Department of Rice and Winter Cereal Crop, NICS, RDA. Culm length of Iksan529 is 74cm and it shows moderate resistance to blast, and wide spectrum resistance to bacterial blight pathogen(K1, K2, K3) and stripe virus. Especially, Iksan529 was identified bph2 gene using KPM2(co-dominant CAPS marker) and KPM4(resistant-associated marker). When Iksan529 seedling were infested at 2nd and 3rd instar stages of BPH nymphs(Bio-type 1), it showed resistance at one month after infest. Iksan529 will be tested local adaptability for 3 years and deveoped for environmental friendly cultivation.
A new mid-late maturing rice variety「Subo」with a good grain quality and for direct seeding
Man-Kee Baek,Woon-Chul Shin,Jong-Cheol Ko,Bo-Kyeong Kim,Jeong-Kwon Nam,Ki-Yeong Kim,Mun-Sik Shin,Ki-Yong Ha,Hyeon-Su Park,Hyeon-Jung Kang,So-Hyun Baek,Young-Jun Mo,Jae-Kwon Ko,Woo-Jae Kim,Young-Bok Le 한국육종학회 2013 한국육종학회 심포지엄 Vol.2013 No.07
‘Subo’ is a new japonica rice variety developed by a cross breeding between HR21124-B-59 and HR19567-B-70-3 having a good Phenotype with a multi-resistance and high yield elite line. The new variety developed for direct seeding by the rice breeding team in Rice Breeding and Cultivation Research Division, Department of Rice and Winter Cereal Crop, NICS, RDA in 2012. The heading date of this variety is August 13 and earlier than that of check variety, Nampyeongbyeo, by two days. ‘Subo’ has 72cm of culm length and 104 spikelets per panicle in direct seeding cultivation. This variety showed resistance to bacterial leaf blight and rice stripe virus and have germinating ability in sumerged soil conditions. The milled rice of this variety exhibits translucent and very clear non-glutinous endosperm. ‘Subo’ has much better palatability of cooked rice than that of Nampyeongbyeo. The whole grain rate of milled rice are 86.9% and milled rice recovery of are 74.6%. The yield of ‘Subo’ in direct seeding cultivation is 5.55MT/ha in milled rice. ‘Subo’ could be adaptable to the southern part plain area of Pyeongtaek and southwestern in Korea.
Ki-Young Kim,Mun-Sik Shin,Jong-Cheol Ko,Jeong-Kwon Nam,Woon-Chul Shin,Hyun-Su Park,Young-Jun Mo,Bo-Kyeong Kim,Jae-Kwon Ko 한국작물학회 2010 한국작물학회 학술발표대회 논문집 Vol.2010 No.04
Korean Japonica resistant rice cultivars mainly posses one of the genes, Xa1 or Xa3 for BB resistance. These resistance genes are becoming susceptible to K3a, resulting in the breakdown of resistance of Japonica cultivars. Especially, glutinous rice cultivars exhibit high susceptibility to bacterial blight(BB) in Korea. This study was carried out to develop glutinous Japonica near-isogenic lines(NILs) conferring useful single gene such as Xa2, Xa3, xa5, Xa21, etc. Six NILs conferring Xa2, Xa3, xa5, xa8, Xa14 and Xa21 genes were developed. Six NILs with Sangjuchalbyeo genetic background were selected by DNA markers and inoculation of K1, K2, K3 and K3a race. NILs having Xa14 was resistant to K1 and susceptible to K2, K3 and K3a. NILs with Xa2 and xa8 was resistant to K1, K2 and susceptible to K3 and K3a. NIL with Xa3 was resistant to K1, K2, K3, but susceptible to K3a. NIL with xa5 was resistant to K1, K2, K3, and K3a. NIL having Xa21 was susceptible to K1, while resistant to K2, K3 and K3a. Identification of xa5 and Xa21 genes were carried out by STS markers. Heading date of NILs ranged from Jul. 31 to Aug. 6. Culm length, No. of grains per panicle and ratio of ripened grain of NILs were a little different to those of Sangjuchalbyeo. Milled rice of NILs were ranged from 437kg/10a to 463. Agronomic traits of NILs containing Xa2, Xa3, xa5, xa8, Xa14 and Xa21 were similar or a little different to those of recurrent parent. These NILs would be useful to develop durable resistant glutinous varieties in Korea.