끝동매미충 저항성 중생종 벼 품종 ‘청남’
‘Cheongnam’ a Rice Cultivar Resistant to Rice Green Leafhopper and Mid-Maturing
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Demands on environmentally friendly rice varieties as a primary food source and functional value are gradually increasing in recent rice consumer markets. Thus, multiple disease and insect resistance rice cultivar with good eating quality is essential in safe rice production. To cope with this situation, the rice breeding team of the Department of Functional Crop,NICS, RDA in 2009 released a new rice cultivar ‘Cheongnam’ which is resistant to rice green leafhopper (GRH). The anther culture method was employed for the developement of ‘Cheongnam’ which is derived from a cross of ‘Kinuhikari’ and ‘Milyang 189’ as a source of GRH resistant. Individual F2 plants of ‘Cheongnam’ / ‘Junam’ were classified as resistance or susceptible based on the survival ratio of GRH nymph. A total of 159 F2 plants from ‘Cheongnam’ / ‘Junam’ inoculated with GRH segregated into 116 resistant, and 43 susceptible plants, which fit to a 3:1 ratio and (χ2= 0.38, df = 1, p = 0.54), suggesting the inheritance of a dominant gene for resistance. Heading date of ‘Cheongnam’ is August 11 as mid maturing ecotype. In the major agronomic characteristics of ‘Cheongnam’, number of spikelet/panicle was slightly low while 1,000 grain weight of brown rice was heavier as compared those of ‘Nampyeongbyeo’. The grain appearance, palatability and other items were more or similar to those of ‘Nampyeongbyeo’ in panel test of cooked rice. The milled rice yield of ‘Cheongnam’ is 5.43 MT per ha, 5.00 MT per ha and 5.18 MT per ha at the ordinary transplanting, double-crop system, and late transplanting of the local adaptability test, respectively. Thus, ‘Cheongnam’ would be a suitable cultivar to the mid and southern plain area, especially in environmentally friendly agricultural production area where rice stripe and dwarf virus as well as bacterial blight are frequent.
Abstract
Demands on environmentally friendly rice varieties as a primary food source and functional value are gradually increasing in recent rice consumer markets. Thus, multiple disease and insect resistance rice cultivar with good eating quality is essential in safe rice production. To cope with this situation, the rice breeding team of the Department of Functional Crop,NICS, RDA in 2009 released a new rice cultivar ‘Cheongnam’ which is resistant to rice green leafhopper (GRH). The anther culture method was employed for the developement of ‘Cheongnam’ which is derived from a cross of ‘Kinuhikari’ and ‘Milyang 189’ as a source of GRH resistant. Individual F2 plants of ‘Cheongnam’ / ‘Junam’ were classified as resistance or susceptible based on the survival ratio of GRH nymph. A total of 159 F2 plants from ‘Cheongnam’ / ‘Junam’ inoculated with GRH segregated into 116 resistant, and 43 susceptible plants, which fit to a 3:1 ratio and (χ2= 0.38, df = 1, p = 0.54), suggesting the inheritance of a dominant gene for resistance. Heading date of ‘Cheongnam’ is August 11 as mid maturing ecotype. In the major agronomic characteristics of ‘Cheongnam’, number of spikelet/panicle was slightly low while 1,000 grain weight of brown rice was heavier as compared those of ‘Nampyeongbyeo’. The grain appearance, palatability and other items were more or similar to those of ‘Nampyeongbyeo’ in panel test of cooked rice. The milled rice yield of ‘Cheongnam’ is 5.43 MT per ha, 5.00 MT per ha and 5.18 MT per ha at the ordinary transplanting, double-crop system, and late transplanting of the local adaptability test, respectively. Thus, ‘Cheongnam’ would be a suitable cultivar to the mid and southern plain area, especially in environmentally friendly agricultural production area where rice stripe and dwarf virus as well as bacterial blight are frequent.
참고문헌 (14)
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