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Development of High-yielding Rice Lines and Analysis of Panicle and Yield-related Traits Using Doubled Haploid Lines Derived from the Cross between Deuraechan and Boramchan, High-yielding japonica Rice Cultivars in Korea
자포니카 다수성 벼 드래찬과 보람찬 유래 약배양 계통을 이용한 이삭 및 수량 관련 형질 분석 및 다수성 계통 육성
Korean J. Breed. Sci. 2015;47(4):384-402
Published online December 31, 2015
© 2015 Korean Society of Breeding Science.

Hyun-Su Park1*, Ki-Yong Ha1, Ki-Young Kim1, Woo-Jae Kim1, Jeong-Kwon Nam1, Man-Kee Baek1, Jeong-Ju Kim1, Jong-Min Jeong1, Young-Chan Cho1, Jeom-Ho Lee2, Bo-Kyeong Kim1, and Sang-Nag Ahn3

1National Institute of Crop Science, RDA, Wanju 55365, Korea2Department of Central Area, NICS, RDA, Suweon 16429, Korea3Department of Agronomy, Chungnam National University, Daejeon 34134, Korea
1농촌진흥청 국립식량과학원, 2농촌진흥청 국립식량과학원 중부작물부, 3충남대학교 농업생명대학
A doubled haploid (DH) lines derived from the cross between high-yielding japonica rice cultivars ‘Deuraechan’ and ‘Boramchan’ was developed to increase diversity of panicle and yield-related traits and select high-yielding lines. Panicle and yield-related traits of DH population consisting of 163 lines and 13 selected high-yielding lines were analyzed using correlation, principal component, and path analysis. Among panicle-related traits, number of spikelets on secondary rachis-branches (SRBs) was more highly correlated with and had more positive effect on number of spikelets (NS) than number of spikelets on primary rachis-branches (PRBs) per panicle. In the DH population, NS had the most positive effect on yield, whereas panicle number per hill (PN) was in the selected lines. PN was significantly positive correlated with ratio of ripened grain (RGG) in both case. The enhancement of ripening and increase of total spikelets number by increasing PN had more effect on yield than increase of total spiekelts number by increasing NS in the selected lines. Among 13 lines, four lines, AC60, AC152, AC156, and AC161 showed higher yield than Deuraechan (481 kg/10a) and Boramchan (558 kg/10a). Deuraechan exhibited panicle-weight type with low tiller and heavy panicles and Boramchan was slightly panicle-number type with more PN and higher RGG. Selected high-yielding lines showed medium characteristics of parents with improved yield potential. These elite lines could be utilized to develop high-yielding japonica rice
Keywords : Rice, Yield, Panicle, Trait, Doubled haploid

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