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ARS Home » Southeast Area » Stuttgart, Arkansas » Dale Bumpers National Rice Research Center » Research » Publications at this Location » Publication #138494
Title: Straighthead-resistant germplasm introduced from China

Author
item Yan, Wengui
item Rutger, J
item MOLDENHAUER, KAREN - UA RREC
item GIBBONS, JAMES - UA RRECD

Submitted to: Arkansas Agricultural Experiment Station Research Series
Publication Type: Experiment Station
Publication Acceptance Date: 8/1/2002
Publication Date: 8/13/2002
Citation: Yan, W., Rutger, J.N., Moldenhauer, K.A., Gibbons, J.W. 2002. Straighthead-resistant germplasm introduced from China. Arkansas Agricultural Experiment Station Research Series. 495:359-368.

Interpretive Summary: Interpretive summary not required.

Technical Abstract: One hundred and four accessions of Chinese germplasm including 97 indica and 7 japonica were evaluated in four maturity groups for straighthead (SH) resistance in the field where arsenic was applied for inducing SH symptom. Four check cultivars included in each group, very resistant Zhe 733, resistant Priscilla, and susceptible Cocodrie and Mars, averaged SH ratings 1, 3, 7 and 8, and yield reductions due to SH of 1, 16, 98 and 95%, respectively. In the very early group 1, 12 accessions of indica germplasm were resistant to SH, in which 9 was rated 1. In the soil treated for SH, yield increases from 5 to 60% were recorded in 8 accessions as compared to the nearby untreated field. In the early group 2, 2 indica accessions were outstanding to SH. Shufeng 109 yielded 117 bu/A in the treated soil for SH, which was 50 bu/A higher than in the untreated field and resulted in 76% yield increase. Danwanbao 24 had a yield of 113 bu/A under the treatment for SH, which was 18 bu/A or 19% more than in the untreated field. In the intermediate group 3, Gui 99 and Shufeng 17 were resistant and had yield reductions of 0 and 13%, respectively in the SH field. In the late group 4, 5 indicas (Jinnuo No6, Sheng 10, Shufeng 121, CDR 22 and Sheng 12) and 1 japonica (Jing 185-7) were resistant to SH with yield reductions ranging from -14 (increased yield) to 18% due to SH. These resistant accessions can be used as genetic donor to improve local cultivars for straighthead resistance.