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Two closely linked tomato HKT coding genes are positional candidates for the major tomato QTL involved in N a + / K + homeostasis
Author(s) -
ASINS MARIA JOSÉ,
VILLALTA IRENE,
ALY MOHAMED M.,
OLÍAS RAQUEL,
ÁLVAREZ DE MORALES PAZ,
HUERTAS RAÚL,
LI JUN,
JAIMEPÉREZ NOELIA,
HARO ROSARIO,
RAGA VERÓNICA,
CARBONELL EMILIO A.,
BELVER ANDRÉS
Publication year - 2013
Publication title -
plant, cell and environment
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.646
H-Index - 200
eISSN - 1365-3040
pISSN - 0140-7791
DOI - 10.1111/pce.12051
Subject(s) - quantitative trait locus , biology , gene , genetics , phenotype , allele
Control of intracellular Na + and K + concentrations in plant tissues under saline conditions is crucial for salt tolerance. In this study, two Na + ‐selective class I ‐ HKT transporters, HKT 1;1 and HKT 1;2, from tomato were found to be closely linked in proximity to the position with the maximum LOD score for major QTLs in chromosome 7 (at a distance of 35 kb), thus contributing to stem and leaf Na + and K + in two populations of tomato RILs derived from two salt‐tolerant lines from wild tomato species S . pimpinellifolium and S . cheesmaniae . This result, together with their patterns of expression and phenotypic effects on a pair of near isogenic lines ( NILs ) differing in terms of HKT1‐like alleles, support the hypothesis that HKT 1;1 and/or HKT 1;2 genes underlies a major tomato QTL for shoot Na + / K + .