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A medium-maturing, disease resistant and good-quality rice variety Geumanbyeo
Hung-goo Hwang,Yeon-gyu Kim,Ha-cheol Hong,Yong-hwan Choi,Man-kee Baek,Im-soo Choi,Young-chan Cho,Chang-in Yang,Hong-yeol Kim,Jong-doo Yea,Young-seop Shin,Kyung-ho Kang,Sang-nag Ahn 한국육종학회 2007 한국육종학회지 Vol.39 No.4
“Geumanbyeo” is a new japonica rice variety developed by the rice breeding team of National Institute of Crop Science, RDA in 2002, which was derived from a cross between SR11878-14-4-1 of good eating-quality and high yield potential, and Suweon345 of lodging tolerance and resistance to diseases. Geumanbyeo is a medium-maturing variety with heading date of August 12 on ordinary planting in the middle plain area. It has a semi-erect plant type with culm length of 82cm, erect pubescent leaf blade and slightly tough culm with good canopy architecture. Geumanbyeo has a little bit fewer tillers per hill, and more spikelets per panicle than Hwaseongbyeo. It is slightly less tolerant to the cold stress in terms of both heading delay and spikelet fertility than Hwaseongbyeo. This variety shows delayed leaf senescence and considerable tolerance to viviparous germination at ripening stage. It shows moderately resistant to leaf blast and K1 race of bacterial blight, but susceptible to virus diseases and insect pests. The milled rice of Geumanbyeo exhibits translucent, relatively clear non-glutinous endosperm and medium-short grain. It showed lower amylose content of 18.6% and similar gelatinization temperature and better palatability of cooked rice compared to Hwaseongbyeo. The milled rice yield of this variety is about 5.32 MT/ha at ordinary culture in local adaptability test for three years. Geumanbyeo would be highly adaptable to the central lowland and mid-southern mountainous areas in Korea. “Geumanbyeo” is a new japonica rice variety developed by the rice breeding team of National Institute of Crop Science, RDA in 2002, which was derived from a cross between SR11878-14-4-1 of good eating-quality and high yield potential, and Suweon345 of lodging tolerance and resistance to diseases. Geumanbyeo is a medium-maturing variety with heading date of August 12 on ordinary planting in the middle plain area. It has a semi-erect plant type with culm length of 82cm, erect pubescent leaf blade and slightly tough culm with good canopy architecture. Geumanbyeo has a little bit fewer tillers per hill, and more spikelets per panicle than Hwaseongbyeo. It is slightly less tolerant to the cold stress in terms of both heading delay and spikelet fertility than Hwaseongbyeo. This variety shows delayed leaf senescence and considerable tolerance to viviparous germination at ripening stage. It shows moderately resistant to leaf blast and K1 race of bacterial blight, but susceptible to virus diseases and insect pests. The milled rice of Geumanbyeo exhibits translucent, relatively clear non-glutinous endosperm and medium-short grain. It showed lower amylose content of 18.6% and similar gelatinization temperature and better palatability of cooked rice compared to Hwaseongbyeo. The milled rice yield of this variety is about 5.32 MT/ha at ordinary culture in local adaptability test for three years. Geumanbyeo would be highly adaptable to the central lowland and mid-southern mountainous areas in Korea.
A New Bacterial Blight Resistant, High-Quality Cultivar, "Seogjeongbyeo" Adaptable to Reclaimed Area
Hae Chune Choi,Hung Goo Hwang,Ha Cheol Hong,Yeon Gyu Kim,Hong Yeol Kim,Moon Tae Song,Yong Hwan Choi,Chang In Yang,Jong Doo Yea,Young Chan Cho,Man Kee Baek,Eung Gi Jeong,O Young Jeon 한국육종학회 2005 한국육종학회지 Vol.37 No.3
A Medium-maturing, Multi-Disease Resistant and High-Quality Rice Cultivar, "Sampyeongbyeo"
Hae Chune Choi,Hung Goo Hwang,Ha Cheol Hong,Yeon Gyu Kim,Chang In Yang,Young Chan Cho,Yong Hwan Choi,Sae Jun Yang,Hong Yeol Kim,Jong Doo Yea,Huhn Pal Moon,Soo Yeon Cho,Sang Nag Ahn 한국육종학회 2005 한국육종학회지 Vol.37 No.2
Park, Kwang-Ho,Goo, Tae-Won,Yun, Eun-Young,Hwang, Jae-Sam,Kang, Seok-Woo,Lee, Sang-Mong,Sohn, Hung-Dae,Jin, Byung-Rae Korean Society of Sericultural Science 2002 International Journal of Industrial Entomology Vol.5 No.1
We have cloned and characterized the complete fibroin light chain gene from the silkworm Baekok-Jam, Bombyx mori, a recommended variety in Korea. It consists of seven exons and six introns. It consists of 14,663 nucleotides long with an open reading frame of 786 nucleotides that encodes a protein of 262 amino acid residues with a molecular mass of approximately 26,000 dalton. The amino acid alignment revealed that the Baekok-Jam fibroin light chain had 98.5 % protein sequence identity to J139 strain: differed at four amino acid positions (11, 46, 80 and 123). The Northern hybridization analysis showed that the Baekok-Jam fibroin light chain gene was specifically expressed in the posterior silk gland.
Evaluation of Iron and Zinc Content in Rice Germplasms
Jeom-Ho Lee,Kyu-Seong Lee,Hung-Goo Hwang,Chang-Ihn Yang,Sang-Bok Lee,Young-Hwan Choi,O-Young Jeong,Parminder Virk 한국육종학회 2008 한국육종학회지 Vol.40 No.2
The germplasm of 246 rice cultivars was analysed for iron and zinc contents using a Inductively Coupled Argon Plasma (ICP) at International Rice Research Institute (IRRI) Philippines. Iron contents ranged from 2.0 to 12.0, and zinc ranged from 10.0 to 33.0 (mg/kg), showing with the mean values of 4.3 and 22.8 (mg/kg), respectively. In genotypes tested, there was approximately a two-fold difference in iron and zinc concentrations, suggesting a genetic potential to increase these micronutrients in rice grain. A highly significant positive correlation (r2=0.503) was found between iron and zinc contents. Iron contents decreased drastically as polishing time increased, whereas zinc decreased only slightly. In the interaction between genotype and environment on iron contents, genotype (G), environment (E), and the G × E interactions accounted for 69%, 5% and 26% of the sums of squares, respectively. Indicating that genotype is would be the most significant factor for the to improve iron contents of rice in rice breeding, suggesting that therefore identifying genotypes with relatively stable performance across various environments is important as staple food crops.
A mid-late maturing, multi-disease resistant and good-quality rice variety Samkwangbyeo
Yeon-gyu Kim,Ha-cheol Hong,Hung-goo Hwang,Im-soo Choi,Young-chan Cho,Man-kee Baek,Yong-hwan Choi,Kyung-ho Kang,Young-seop Shin,Jeom-ho Lee,Hong-yeol Kim,Jong-doo Yea,Hae-yeong Ryu,Eung-ki Jeong,Chang- 한국육종학회 2007 한국육종학회지 Vol.39 No.4
Occurrence of Off-type Plants in japonica/indica Hybrid Rice Cultivars
Lee,Jeom-Ho,Jeon,Yong-Hee,Hwang,Hung-Goo 한국자원식물학회 2004 Plant Resources Vol.7 No.2
Frequent occurrence of off-type plants in a given cultivar has been a serious problem in both breeder s and farmer s fields. An experiment was designed to examine the differences in rate of occurrence of off-type plants among Tongil-type cultivars (high yielding cultivars derived from indica/japonica hybridization) from which the possible cause of higher occurrence of off-type plant in a specific cultivar was deduced. Among five Tongil-type cultivars examined for morphological variant in the field, only one cultivar, Dasanbyeo, had off-type plants. When analyzed with SSR markers, off-type plants showed different band patterns from original cultivar, having several extra bands in addition to cultivar-specific band, suggesting that off-type plants were originated from Dasanbyeo, rather than originated from mixing or mishandling of seed materials with other cultivars. The possible cause of off-type occurrence seems to be natural pollination with other cuItivars adjacent to the original cultivar during seed multiplication. This was supported from the observation that self-crossed progeny of the off type plants showed a wide range of variation of agronomic traits which could not be observed when there was a smaller introduction of genes to the fixed germplasm as happened in the case of cultivar mutation. Another evidence supported this idea that Dasanbyeo showed much of difference in floral organ and behavior to other cultivar to be subjected to higher out-crossing than other cultivars examined.
A Quick and Simple In-house Screening Protocol for Cold-Tolerance at Seedling Stage in Rice
( Hasina Khatun ),( Partha S Biswas ),( Hung Goo Hwang ),( Kyung-min Kim ) 한국육종학회 2016 Plant Breeding and Biotechnology Vol.4 No.3
Cold stress is an emerging threat for rice production in Bangladesh particularly in Boro season (winter rice) at seedling stage. Cold stress during seedbed stage or early establishment stage at the main field induces severe seedling mortality that increases cost cultivation and delays crop establishment and ultimately entails into low yield. Development of sustainable cold tolerant high yielding rice varieties warrants an efficient and economic screening technique of germplasms and breeding population. The protocols for cold screening that so far have been used by the breeders and reported in literature are generally dependent on natural cool temperature and/or expensive climate chamber. In this paper, we report an in-house screening protocol that requires less than three weeks to complete the screening cycle and can be used all year round for mass screening of breeding population.