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Frontiers of Agriculture in China

ISSN 1673-7334

ISSN 1673-744X(Online)

CN 11-5729/S

Front Agric Chin    2009, Vol. 3 Issue (1) : 29-33     DOI: 10.1007/s11703-009-0007-0
RESEARCH ARTICLE |
Research on the development of weed-suppressing rice varieties
Shaochuan ZHOU(), Decheng LU, Hong LI, Daoqiang HUANG, Ruowei MIAO
Guangdong Academy of Agricultural Sciences, Guangzhou 510640, China
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Abstract  

This study was conducted to develop weed-suppressing rice varieties in a weed-suppressing nursery by specific secondary metabolite markers of allelopathic potential. Weed-suppressing rice variety Feng-Hua-Zhan was screened out by a specific secondary metabolite marker of allelopathic potential. Weed-suppressing rice No.1, a new rice line with good quality, was also developed using this method. The genetic backgrounds and research directions of weed-suppressing rice varieties are discussed in this paper.

Keywords rice breeding      weed-suppressing      specific secondary metabolite     
Corresponding Authors: ZHOU Shaochuan,Email:xxs123@163.com   
Issue Date: 05 March 2009
URL:  
http://academic.hep.com.cn/fag/EN/10.1007/s11703-009-0007-0     OR     http://academic.hep.com.cn/fag/EN/Y2009/V3/I1/29
length of growth period /dproductive panicles /104?hm-2plant height/cmpanicle length/cmspikelets/no. per paniclefilled grain/no. per panicleseed setting rate/%1000-grain weight/g
1154.8085.220.980.8669.5686.0321.74
Tab.1  Agronomic traits of PI312777 in Guangzhou region
varietyearly-cropping seasonlate-cropping season
barnyard grassotherstotalbarnyard grassotherstotal
PI3127770.83 b57.33 b58.16 b8.5 b243.0 b251.5 b
Feng-Hua-Zhan1.00 b29.67 b30.67 b21.5 b435.0 ab456.5 b
Hua-Jing-Xian3.17 a359.84 a363.01 a116.5 a630.0 a746.5 a
Tab.2  Multiple comparisons among the Nos. of weeds accompanying different rice varieties (plant·10m)
varietyearly-cropping seasonlate-cropping season
barnyard grassotherstotalbarnyard grassotherstotal
PI31277717.65 b46.10 b63.75 b25.00 b86.70 b111.70 b
Feng-Hua-Zhan17.45 b76.45 b93.90 b66.80 b130.00 b196.65 b
Hua-Jing-Xian76.69 a213.35 a290.20 a338.35 a278.30 a616.65 a
Tab.3  Multiple comparisons among dry mass weights of weeds accompanying different rice varieties (plant·10m)
varietybarnyard grasssessile alternantheradifformed galingalesmallflower galinsogaChinese sprangletopsheathed monochoriasand ammanniarice galingaleprocumbent pennisetum
PI 3127770.8 b0.5 b37.5 b0.80002.520
Feng-Hua-Zhan1.0 b1.0 b0.65 b1.51.5101.57.5
Hua-Jing-Xian3.15 a5.5 a328 a1.58.510.510.512.5
Tab.4  Multiple comparisons among the Nos. of different weeds accompanying different rice varieties (plant·10m)
cross combinationsgenerationselected lines
Lu-Te-Zhan/PI312777F613
Feng-Si-Zhan/PI312777F624
Feng-Hua-Zhan/Cypress//PI312777F516
Mei-Xiang-Zhan 8//Ai-Xiu-Zhan/PI312777F519
Feng-Si-Zhan//Ai-Xiu-Zhan/PI312777F57
Lu-Te-Zhan//Ai-Xiu-Zhan/PI312777F510
Wu-Shan-You-Zhan/PI312777F55
Wu-Shan-You-Zhan/PI312777F44
PI312777/Mo-Li-Ruan-ZhanF38
PI312777/Feng-Yue-ZhanF34
Takaneshike/Wu-Shan-You-Zhan//PI312777F39
Takaneshike/Wu-Shan-You-Zhan//Mo-Li-Xin-ZhanF38
Tab.5  Promising rice lines
traitLu-Te-Zhan/PI312777Jing-Xian 89 (CK)
yield/t?hm-27.866.19
±CK1/%+26.9%
productive panicles/104?hm-2264270
resistance to bacterial blight/class34
plant height/cm107.8102.6
panicle length/cm2220.2
spikelets No./grain156188
seed setting rate/%84.876.7
1000-grain weight/g17.617.2
duration from sowing to harvesting/d109114
amylose content/%14.2
AI0.668
Tab.6  Results of the contrast experiment in the late season of 2005
traitFeng-Si-Zhan/PI312777Feng-Hua-Zhan/Cypress/PI312777Feng-Hua-Zhan (CK1)PI312777(CK2)
yield /t?hm-25.354.445.003.40
±CK1/%,±CK2/%+6.95, +57.14–11.11, +30.61
productive panicles /104?hm-2243220.5232.5304.5
resistance to bacterial blight /class31-3110
plant height /cm96.894.592.382.2
panicle length /cm21.0321.8422.0719.74
spikelets No.117.4119.4120.568.6
seed setting rate /%78.48289.686.7
1000-grain weight /g22.8320.3819.321.74
duration from sowing to harvesting /d110105105108
AI0.6590.6280.6500.534
Tab.7  Results of demonstration in the late season of 2005
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