水稻苗期耐低磷基因型差异研究

采用难溶性磷酸盐Ca3 (PO4) 2 液相控释方法试验研究不同水稻品种 (系 )苗期耐低P基因型差异结果表明 ,各水稻基因型耐低P胁迫能力存在极显著差异 ,其中“汕优 6 3”、“IR74”、“汕优 16 1”、“IR70 6 17 4B B19 2”、“IR6 4”5个品种 (组合 )耐低P能力最强 ;“IR70 6 5 1 3B 3 2 2 2”、“IR71331 2B 2 1”、“南川”、“IR71379 2B 10 2 3 1”和“IR72 4 13 3R 2 6 2”5个品种 (系 )对低P胁迫较敏感 ;而“IR73384 11 7 8 3 2 3 3 3”、“IR73382 111 9 19 19 2 3 1 2”、“IR72 4 17 3R 6 2”、“IR36”、“IR72 4 17 3R 8 3”和“IR72 4 12 3R 11 3”6个品种 (系 )P效率则属中间型。

Study on the difference of rice genotypes tolerant to low phosphorus stress in the seedling stage

Responses of 38 rice (Oryza sativa L.) cultivars to low phosphorus environment were preliminarily evaluated by means of a controlled system with insoluble phosphorate source(Ca_3(PO_4)_2) in liquid phase. The results show a significant genotypic variation tolerant to P deficiency in the tested 16 rice germplasms, indicating that "Shanyou63", "IR74", "Shanyou161", "IR70617-4B-B19-2" and "IR64" are the most tolerant type, "IR70651-3B-3-2-2-2", "IR71331-2B-2-1", "Namchuan", "IR71379-2B-10-2-3-1" and "IR72413-3R-26-2" are more sensitive genotypes, but "IR73384-11-7-8-3-2-3-3-3", "IR73382-111-9-19-19-2-3-1-2", "IR72417-3R-6-2", "IR36", "IR72417-3R-8-3" and "IR72412-3R-11-3" are the moderate type in terms of tolerance to P deficiency.