New wheat genotypes tolerant to aluminum toxicity obtained by mutation induction

Pesquisa Agropecuária Brasileira

Augusto Tulmann Neto²  Marcelo Correa Alves¹  Carlos Eduardo De Oliveira Camargo¹  Jairo Lopes De Castro¹  Wilson Penteado Ferreira Filho¹ 

[1] ,Universidade de São Paulo Centro de Energia Nuclear na Agricultura Piracicaba SP

关键词: acid soil;    liming;    breeding methods;    mutants;    gamma radiation;    agronomic characters;    grain yield;    plant breeding;    solo ácido;    calagem;    métodos de melhoramento;    mutante;    raios-gama;    características agronômicas;    rendimento de grãos;    melhoramento de plantas;   

DOI  :  10.1590/S0100-204X2001000100008

来源: SciELO

【 摘 要 】

Seed from the sensitive wheat (Triticum aestivumL.) cultivar Anahuac was treated to gamma-ray irradiation and eleven Al3+ tolerant mutants selected. The objective was to compare these mutants to the original Anahuac and to the tolerant wheat cultivars IAC-24 and IAC-60 from 1994 to 1996 in acid (Capão Bonito) and limed (Monte Alegre do Sul) soil field trials, in the State of São Paulo, Brazil. Grain yield and agronomic characteristics were analyzed. All the mutant lines yielded higher than the sensitive Anahuac cultivar in the acid soils of Capão Bonito. Under limed soil conditions, 10 mutants had a similar yield to the original sensitive cultivar and one a lower yield. The majority of the mutants were similar in yield to the tolerant cultivars IAC-24 and IAC-60 under both conditions. Some of the mutants showed altered agronomic characteristics, but these alterations did not generally influence the grain yield. The results indicated that tolerant lines with good characteristics may be obtained from a susceptible cultivar by mutation induction, thus allowing cropping under conditions where Al3 + is a limiting factor.

【 授权许可】

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