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Acta Agron Sin ›› 2009, Vol. 35 ›› Issue (5): 921-929.doi: 10.3724/SP.J.1006.2009.00921

• TILLAGE & CULTIVATION·PHYSIOLOGY & BIOCHEMISTRY • Previous Articles     Next Articles

Comparison of Rice Plant Types in Northeast Region of China

LI Hong-Yu1,HOU Yu-Ming1,CHEN Ying-Hua1,QUAN Cheng-Zhe2,YAN Ping3,LIU Meng-Hong4，WU Hong-Tao3，CHEN Wen-Fu1，XU Zheng-Jin1*   

  1. 1Rice Institute，Shenyang Agricultural University/ Key Laboratory of Crop Physiology，Ecology，Genetics and Breeding，Ministry of Agriculture/Key Laboratory of Northern Japonica Rice Breeding of Liaoning，Shenyang 110161，China；2 Rice Institute of Jilin Province，Gongzhuling  136100,China;3Wuchang  Rice Institute,Heilongjiang Academy of Agricultural sciences，Wuchang 150229，China；4Plant Protection Institute，Academy of Heilongjiang Land-Reclaimalbe Sciences，Jiamusi 154000，China
  • Received:2008-12-04 Revised:2008-12-24 Online:2009-05-12 Published:2009-03-23
  • Contact: XU Zheng-Jin，xuzhengjin@126.com

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Abstract:

Eighty-one rice cultivars and lines tested in regional trial in Liaoning, Jilin, and Heilongjiang provinces in 2006 and 2007 were used to study the plant-type characteristics and their relationships with yield in Shenyang, Gongzhuling, and Wuchang. The results indicated that the plant-types of most cultivars and lines in northeast region of China were EPT (erect panicle type) or SEPT (semi-erect panicle type) according to PNC (panicle-neck curvature), DPT (dense panicle type) or SDPT (semi-dense panicle type) according to grain density, MPT (middle panicle type) or HPT (heavy panicle type) according to panicle weight and low part panicle superior. Most rice cultivars or lines were CPT (curve panicle type) or SEPT in Heilongjiang, SEPT in Jilin and EPT in Liaoning; semi-dense or loose panicle type, and MPT (middle panicle type) or TPT (thin panicle type) in Jilin and Heilongjiang, and dense panicle type and HPT(heavy panicle type) in Liaoning. Large vascular bundles in neck (LVBN), small vascular bundles in neck (SVBN),large vascular bundles in the second internode (LVBS) and small vascular bundles in the second internode (SVBS) ranked as Liaoning＞Jilin＞Heilongjiang; length and width of the top three leaves of Liaoning cultivars were the largest, but basic angle less than that of Jilin and Heilongjiang. LVBN, SVBN, LVBS, and SVBS were very positively correlated with primary branches, primary branch grains, secondary branches, secondary branch grains, and secondary branch grain rate, but negatively correlated with seed-setting rate and 1000-grain weight of primary branch and secondary branch. Cluster analysis showed that most cultivars in northeast of China were high-yielding or mid-yielding. With a tendency of more vascular bundles, longer and wider the top three leaves, higher plant, larger biomass and smaller angle of leaf.

Key words: Rice, Plant type, Panicle trait, Yield

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