Inheritance of Aluminum Tolerance and its Effects on Grain Yield and Grain Quality in Oats (Avena Sativa L.) |
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| Authors: | Itamar Cristiano Nava Carla Andréa Delatorre Ismael T de Lima Duarte Marcelo Teixeira Pacheco Luiz Carlos Federizzi |
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| Institution: | (1) Department of Crop Science, Agronomy School, Federal University of Rio Grande do Sul (UFRGS), Av. Bento Gonçalves, 7712, Porto Alegre, RS, 91501–970, Brazil |
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| Abstract: | Summary Aluminum toxicity due to the cation Al+3 is a major factor limiting yields in acid soils. Wide genetic variability to aluminum tolerance is found in oat genotypes. The objectives of this study were to determine the number of genes controlling aluminum tolerance in oats and to verify if any detrimental effects were present of the aluminum tolerance genes on grain yield and grain quality in Al+3free soils. Aluminum tolerance was estimated as the average regrowth of the main root after exposure to toxic levels of Al+3 in a hydroponic solution under controlled conditions. The number of genes controlling that trait was estimated from the distribution of the average root regrowth frequencies in a population of 333 recombinant inbred lines (RIL's) in generations F5:6 and F5:7. The effects on grain yield and grain quality were assessed in a subpopulation of 162 RIL's chosen based on their aluminum tolerance response. Aluminum tolerance in the evaluated population was controlled by one dominant major gene with the tolerant genotypes carying Al
a
Al
a
and the sensitive ones al
a
al
a
alleles. No detrimental effects of the Al
a
allele on grain yield or grain quality were detected.Part of the Master of Science dissertation of the first author |
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| Keywords: | Al+3 genetic control recombinant inbred line RIL soil acidity |
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