Abstract
Al sensitivity was compared between rice (cv. Nipponbare) and wheat (cv. ET8), and rice exhibited much higher tolerance to Al during primary root development from seed, but not during root elongation of seedlings than wheat.
To identify rice gene(s) regulating Al tolerance during primary root development, we obtained 8 Al-sensitive candidates from the 1020 Nipponbare TOS17 line of T3 generation. The segregation pattern of Al sensitivity of these candidates was investigated in T3 population seeds derived from one spikelet, and 2 lines exhibited 1(Al sensitive): 3(Al tolerant) segregation, suggesting that Al sensitive phenotype of these mutants is due to single recessive mutation.
In mature plants grown in normal soil, no significant difference in plant length and tiller number was observed between these mutants and wild type Nipponbare, suggesting that these Al-sensitive mutations does not affect normal growth.
