Genetic analysis of aluminum tolerance in maize

Inheritance of aluminum tolerance in maize

“…This result confirms the distribution frequency of seminal root length observed by Prioli et al (2002), who also used L922 and Ast214 inbred lines. The proportion 3:1, which suggests that only one locus is involved in inheritance and dominance of aluminum tolerance, was also reported in previous studies analyzing segregation of the F 2 generation (Rhue et al 1978, Garcia and Silva 1979, Jorge and Arruda 1997.…”

“…The dispersion of F 2:3 lines for tolerance and susceptibility selection (Figure 2) is reflected by the magnitude of the narrow-sense heritability of 0.49. This value for the heritability of root length of maize seedlings developed in nutrient solution with aluminum can be considered low compared to those reported in literature obtained by generation means and variance analysis (Magnavaca et al 1987, Sawazaki and Furlani 1987, Prioli et. 2000.…”

“…Compared to the study of Prioli et al (2002), further information on the lines L922 and Ast214 was obtained in the present study using F 2:3 lines. It is noticeable that the asymmetry of the frequency distribution of F 2:3 lines (Figure 1b) was similar to bimodal distribution.…”

“…The CV of 8.06% in the tolerant L922 inbred line can be considered low. In experiments with aluminumsensitive germplasm, a CV of around 20% was found for seminal root length (Magnavaca 1987, Prioli et al 2000.…”

“…Seedlings were grown for 10 days in nutrient solution, according to Clark (1977) with some modifications (Prioli et al 2002), with 4.5 mg L -1 aluminum and forced aeration. This dose is appropriate for discrimination of tolerant and nontolerant maize genotypes.…”