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자포니카 장립종 장원형 벼 계통 개발 및 특성분석

Development and Characterization of japonica Rice Line with Long and Spindle-shaped Grain

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참고문헌

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주제분류농학

초록

To enhance rice yield and diversify grain quality of Korean japonica rice, we developed japonica rice line with long and spindle-shaped grain. Korean japonica rice cultivars have narrow genetic background of grain size and shape. Most of cultivars show medium-short and semi-round grain. To diversify the genetic background for grain, we developed Jeonju625, japonica rice line with long and spindle-shaped grain, derived from a cross between DSG79, the breeding material with extra-long and spindle-shaped grain, and Boramchan, japonica super high-yielding cultivar with medium-short and semi-round grain. Jeonju625 had GW2gs3qSW5+qGL3 allele type for grain-related genes, which conferred extra-long and spindle-shaped grain. The grain length and ratio of length to width of brown rice of Jeonju625 was 7.06 mm and 2.72, respectively. Jeonju625 was improved the deteriorated traits of DGS79, very late heading, long culm, long awn, droopy flag leaves, and susceptibility to lodging, by strong selection pressure focused on field breeding. The milled rice yield of Jeonju625 was 559 kg/10a, which was similar level of Boramchan (552 kg/10a) and 29% enhanced yield compared to DSG79. Jeonju625 had suitable characteristics for cooked rice. Jeongju625 showed lower protein contents and better glossiness and palatability of cooked rice than Boramchan and Hanareum2. Elite japonica rice line, Jeonju625, with extra-long and spindle-shaped grain showed good characteristics for rice yield and grain quality. Jeonju625 could be utilized practical cultivar and breeding material for enhancing rice yield and diversifying grain quality.

Abstract

To enhance rice yield and diversify grain quality of Korean japonica rice, we developed japonica rice line with long and spindle-shaped grain. Korean japonica rice cultivars have narrow genetic background of grain size and shape. Most of cultivars show medium-short and semi-round grain. To diversify the genetic background for grain, we developed Jeonju625, japonica rice line with long and spindle-shaped grain, derived from a cross between DSG79, the breeding material with extra-long and spindle-shaped grain, and Boramchan, japonica super high-yielding cultivar with medium-short and semi-round grain. Jeonju625 had GW2gs3qSW5+qGL3 allele type for grain-related genes, which conferred extra-long and spindle-shaped grain. The grain length and ratio of length to width of brown rice of Jeonju625 was 7.06 mm and 2.72, respectively. Jeonju625 was improved the deteriorated traits of DGS79, very late heading, long culm, long awn, droopy flag leaves, and susceptibility to lodging, by strong selection pressure focused on field breeding. The milled rice yield of Jeonju625 was 559 kg/10a, which was similar level of Boramchan (552 kg/10a) and 29% enhanced yield compared to DSG79. Jeonju625 had suitable characteristics for cooked rice. Jeongju625 showed lower protein contents and better glossiness and palatability of cooked rice than Boramchan and Hanareum2. Elite japonica rice line, Jeonju625, with extra-long and spindle-shaped grain showed good characteristics for rice yield and grain quality. Jeonju625 could be utilized practical cultivar and breeding material for enhancing rice yield and diversifying grain quality.

참고문헌 (39)

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