|Title:||水稻抗稻熱病混合品種之抗病性及生產力研究||Other Titles:||Yield and Resistance of Rice Blast Resistant Composite Varieties||Authors:||邱善美
|Issue Date:||1-Sep-1975||Publisher:||農業試驗所||Journal Volume:||24||Journal Issue:||1-2||Start page/Pages:||1-10||Source:||中華農業研究||Abstract:||
This study is aimed at developing composite varieties which are composed of promissing blast resistance lines from Taichung 184, 186, Taichung yu 115, Pino 4 and C 115, with the genetic background of varieties Tainan 5 and Chianan 8. The blast resistance of composite varieties was tested at Pinglin where the disease prevails severely in both the 1st and 2nd crops. For the yield trial, four locations were included, namely Pinglin, Taipei, Chiayi and Pingtung. Results of the study are concluded as follows:
1. The composite varieties gave a successful control over the prevalence of the disease. The degree of leaf blast infections of the recurrent parents Tainan 5 and Chianan 8, was 35.7% and 50.2% in the 1st crop, 85.3 and 89.2% in the 2nd crop, respectively, while that of the composite varieties ranged from 1.0% (varieties 5-1, 9-1 and 31-2) to 5.1% (variety 40-2) in the 1st crop, and 1.5% (varieties 3-1 and 5-1) to 10.5% (variety 7-1) in the 2nd crop, with an average of 3.27%.
2. The composites outyielded the recurrent parents by 10-34% in the 1st crop and
57-104% in the 2nd crop. The difference was highly significant, especially, when the disease epidemic was severe in the 2nd crop.
3. With the non-infected plots in Taipei and Chiayi, no significant difference in grain yield was observed between the composites and the parental varieties. However it was significant at Pingtung district in both rice crop seasons. The composite varieties 3-1 and 7-1 outyielded Tainan 5 by 10-30%, while varieties 40-2, 31-2, 33-2 and 41-2 yielded less than Chianan 8 by 5-13% in 2nd crop season.
|Appears in Collections:||1.台灣農業研究(1950～迄今)|
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