水稻苗期耐低磷基因型差异研究

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

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。

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.