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选育和推广抗病品种是防治水稻白叶枯病的根本途径。自1975年以来,在大量筛选、鉴定的基础上,从 BG-90-2品种中系统选育出“扬稻1号”及“910”品系,连续四年进行白叶枯病多菌株接种鉴定和省内外较大面积试种,均一致表现抗性稳定,并兼抗穗颈稻瘟病。其抗病机理,根据该两品种(系)稻株功能叶内生化成份分析结果,其还原糖含量比感病品种“南京11号”为高,且在接种发病后,天门冬氨酸、丙氨酸、谷氨酸和脯氨酸的含量亦较高,还具有较好的抗扩展性能。1983年在本省及长江中下游地区种植面积达10万公顷以上,1984年在苏、鄂、皖、豫、浙、川等省种植面积达33.4万公顷以上。单产均达7.5吨/公顷左右,深受病区农户的欢迎。
Breeding and popularizing disease-resistant varieties is the fundamental way to control bacterial leaf blight in rice. Since 1975, based on a large number of screening and identification, “Yangdao 1” and “910” lines have been systematically selected from BG-90-2 cultivars and inoculated with bacterial blight isolates for four consecutive years And a large area of the province and outside the species, are consistently resistant and stable, and resistant to panicle blast. The results showed that the reducing sugar contents were higher than those of the susceptible cultivar “Nanjing 11” according to the analysis of biochemical components in the functional leaves of the two varieties (lines). After the onset of inoculation, aspartic acid, Amino acid, glutamic acid and proline content is also higher, but also has good anti-scalability. In 1983, more than 100,000 hectares were planted in the middle and lower reaches of the province and the Yangtze River. In 1984, more than 334,000 hectares were planted in the provinces of Jiangsu, Hubei, Anhui, Henan, Zhejiang and Sichuan. Yields reached about 7.5 tons / hectare, by the ward farmers welcome.