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冷水處理沓에서 벼 雜種集團의 出穗日數, 稔實率 및 穗當穎花數의 選拔效率
Un Ho Yang(梁雲鎬),Jong Doo Yea(芮鐘斗),Kwang Ho Kim(金光鎬) 한국육종학회 1995 한국육종학회지 Vol.27 No.3
To find out the selection efficiency of days to heading, spikelet fertility and spikelet number per panicle under cold water condition, plant selection and progeny test were conducted under 17℃ water temperature using F₂ plants of Cheolweon 50/Jinbuolbyeo and F₄ population of Jinbuchalbyeo/Jinbubyeo//Shinseonchalbyeo/Songjeonbyeo. Frequency distribution curves in F₂ plants leaned to low leaf discoloration value, late heading, long culm length, low spikelet fertility, and spikelet number per panicle showed wide continuous variation in F₂ under cold water treatment. Plant selection for early heading in F₂ and F₄ under cold water condition was effective and the most effective results were obtained when plants were selected based on all of days to heading, spikelet fertility and spikelet number per panicle in F₂, and both days to heading and spikelet fertility in F₄. Heritability of days to heading by genetic advance method was extremely high. Selection by high spikelet fertility was effective and plant selection conducted based on both spikelet fertility and spikelet number per panicle in F₂ and spikelet fertility alone in F₄ were most effective. Heritability of spikelet fertility calculated by genetic advance method was high in both combinations observed. Selection efficiency of spikelet number per panicle was lower than that of days to heading or spikelet fertility. Heritability of spikelet number per panicle by genetic advance method was not high.
Effect of Low Temperature on Heterosis for Traits Related to Cold Tolerance in Japonica Rice
Sang Nag Ahn,Eung Gee Jeong,Jong Doo Yea 한국육종학회 2004 한국육종학회지 Vol.36 No.3
Forty-four F1 hybrids derived from crosses among eleven temperate japonica rice cultivars were grown and evaluated for traits related to cold tolerance including days to heading and spikelet fertility in the cold-water irrigated plot (17℃) and
SSR Analysis of Heterosis for Cold Tolerance in Rice
Jung Pil Suh,Young Chan Cho,Eung Gi Jeong,Im Soo Choi,Yong Hwan Choi,Man Kee Baek,Jong Doo Yea,Sang Nag Ahn,Yeon Gyu Kim,Hung Goo Hwang 한국육종학회 2004 한국육종학회지 Vol.36 No.3
The genetic basis underlying heterosis for agronomic traits of rice under cold water irrigated field condition was investigated in the 143 RILs and 286 BC1F1 lines from the cross between a cold-susceptible variety, Milyang23 and a co