학술논문
Alleles of organic acid transporter genes are highly correlated with wheat resistance to acidic soil in field conditions
Original Article
Original Article
Document Type
Report
Author
Source
Theoretical and Applied Genetics. July 2016, Vol. 129 Issue 7, p1317, 15 p.
Subject
Language
English
ISSN
0040-5752
Abstract
Author(s): Jorge G. Aguilera[sup.1] , João A. D. Minozzo[sup.1] [sup.2] , Diliane Barichello[sup.1] [sup.4] , Claúdia M. Fogaça[sup.1] [sup.3] , Jose Pereira da Silva[sup.1] , Luciano Consoli[sup.1] , Jorge F. [...]
Key message TaALMT1andTaMATE1Bpromoter alleles are highly correlated with wheat growth in acidic soil with a high concentration of toxic aluminium. The aluminium (Al.sup.3+) resistance of 338 wheat genotypes with different geographic origins was correlated with morphological traits and TaALMT1 and TaMATE1B alleles. Both of these genes encode malate and citrate transporters associated with Al.sup.3+ resistance mechanisms in wheat. Based on comparisons with the sensitive and resistant controls, the relative root growth was evaluated in hydroponic experiments and the plant performance was visually accessed in the field. The correlation between Al.sup.3+ tolerance in the hydroponic and field tests was moderate (r = 0.56, P < 0.001). Higher selection pressure was observed in the field because a smaller number of genotypes was classified as resistant. The combination between the six TaALMT1 alleles and the two TaMATE1B promoters allowed the identification of 11 haplotypes that showed a high (r = 0.71, P < 0.001) correlation with Al.sup.3+ resistance in the field, with the TaALMT1 alleles accounting for most of the correlation. The Brazilian wheat genotypes presented the best performance in soil, including eight cultivars with promoters usually associated with Al.sup.3+ resistance and another six genotypes classified as moderately resistant but containing alleles usually associated with Al.sup.3+ sensitivity. Although an increase in favourable alleles was observed over the past few decades, the average Al.sup.3+ resistance in the field was not significantly different from that of older cultivars. The ease identification of the TaALMT1 and TaMATE1B alleles and their higher association with Al.sup.3+ resistance along with the best genotypes identified here may be used for wheat-breeding programmes interested in increasing wheat Al.sup.3+ resistance.
Key message TaALMT1andTaMATE1Bpromoter alleles are highly correlated with wheat growth in acidic soil with a high concentration of toxic aluminium. The aluminium (Al.sup.3+) resistance of 338 wheat genotypes with different geographic origins was correlated with morphological traits and TaALMT1 and TaMATE1B alleles. Both of these genes encode malate and citrate transporters associated with Al.sup.3+ resistance mechanisms in wheat. Based on comparisons with the sensitive and resistant controls, the relative root growth was evaluated in hydroponic experiments and the plant performance was visually accessed in the field. The correlation between Al.sup.3+ tolerance in the hydroponic and field tests was moderate (r = 0.56, P < 0.001). Higher selection pressure was observed in the field because a smaller number of genotypes was classified as resistant. The combination between the six TaALMT1 alleles and the two TaMATE1B promoters allowed the identification of 11 haplotypes that showed a high (r = 0.71, P < 0.001) correlation with Al.sup.3+ resistance in the field, with the TaALMT1 alleles accounting for most of the correlation. The Brazilian wheat genotypes presented the best performance in soil, including eight cultivars with promoters usually associated with Al.sup.3+ resistance and another six genotypes classified as moderately resistant but containing alleles usually associated with Al.sup.3+ sensitivity. Although an increase in favourable alleles was observed over the past few decades, the average Al.sup.3+ resistance in the field was not significantly different from that of older cultivars. The ease identification of the TaALMT1 and TaMATE1B alleles and their higher association with Al.sup.3+ resistance along with the best genotypes identified here may be used for wheat-breeding programmes interested in increasing wheat Al.sup.3+ resistance.