Abstract
Aluminum ions inhibit root growth in acid soil in many area including tropic
countries. It would thus be important to understanding mechanism of Al
tolerance to attain sustainable agriculture in these areas. In the present
study, we performed QTL analysis of Al-tolerance in a recombinant inbred
lines of Arabidopsis derived from cross between Cvi and Ler. Root growth in
aluminum solution of both parental lines was similar, but RI lines were
transgressively segregated. Using relative root length, which reflects
specific Al tolerant gene segregated in the population, we found two single
factor QTLs and several epistatic interactions. The major QTL mapped on
chromosome 3, which can explain 15% of variation, is unique for this
population. However, the other QTL locating on the top of chromosome 1 and
some epistatic interacting loci pares were shared by different RI
population, which we have already reported.
