Salt tolerance in Lycopersicon species. II. Genetic effects and a search for associated traits

1993 ◽  
Vol 86 (6) ◽  
pp. 769-774 ◽  
Author(s):  
M. J. Asins ◽  
M. P. Bretó ◽  
E. A. Carbonell
Keyword(s):  
Salt Tolerance ◽  
Genetic Effects ◽  
Lycopersicon Species

scholarly journals Genetic Analysis of Salt Tolerance during Vegetative Growth in Tomato

HortScience ◽  
1996 ◽  
Vol 31 (4) ◽  
pp. 624b-624
Author(s):  
M.R. Foolad
Keyword(s):  
Salt Stress ◽  
Salt Tolerance ◽  
Vegetative Growth ◽  
Genetic Effects ◽  
Least Square ◽  
Variance Component Analysis ◽  
Tomato Cultivar ◽  
Narrow Sense Heritability ◽  
Relative Growth ◽  
The Absolute

Breeding for salt tolerance in tomato (Lycopersicon esculentum Mill.) has been restricted by insufficient knowledge of the genetic control of tolerance. The genetic basis of salt tolerance during vegetative growth was investigated by growing a salt tolerant (PI174263) and a salt sensitive tomato cultivar (UCT5) and their F1, F2, and backcross progeny in saline solutions with electrical conductivity of 0.5 (control) and 20 dS·m–1 (salt-stress). The relative salt tolerance of each generation was determined as the percentage of growth (i.e., dry matter production) under salt-stress relative to growth under control conditions. In all generations, shoot growth was significantly reduced by salt-stress. The reduction was largest in UCT5 (56.1%) and smallest in the F1 (27.4%) followed by PI174263 (32.3%). Analysis of the absolute and relative growth under salt-stress indicated that genes contributing to vigor might be different from genes conferring tolerance. Generation means analyses of the absolute and relative growth indicated that the majority of the genetic variation among generations were due to simple (additive and dominance) genetic effects; nonallelic interactions, although significant, were far less important. Partitioning of the total genetic variance by weighted least square regression analysis and variance component analysis indicated that 88% or more of the variation were due to additive genetic effects. A moderate estimate of narrow sense heritability (0.49 ± 0.09) was obtained for shoot dry weight under salt-stress treatment. The results indicate that tomato salt tolerance during vegetative growth can be improved by breeding and selection.

Salt tolerance in Lycopersicon species. I. Character definition and changes in gene expression

1993 ◽  
Vol 86 (6) ◽  
pp. 737-743 ◽  
Author(s):  
M. J. Asins ◽  
M. P. Bretó ◽  
M. Cambra ◽  
E. A. Carbonell
Keyword(s):  
Gene Expression ◽  
Salt Tolerance ◽  
Lycopersicon Species

Application of SSR Technique for the Identification of Markers Linked to Salinity Tolerance in Rice

2013 ◽  
Vol 19 (2) ◽  
pp. 57-65
Author(s):  
MH Kabir ◽  
MM Islam ◽  
SN Begum ◽  
AC Manidas
Keyword(s):  
Salt Tolerance ◽  
Ssr Markers ◽  
Salinity Tolerance ◽  
Seedling Stage ◽  
Phenotypic Screening ◽  
Salt Tolerant ◽  
Marker Assisted Breeding ◽  
Hydroponic System ◽  
Rice Landrace ◽  
Salt Susceptible

A cross was made between high yielding salt susceptible BINA variety (Binadhan-5) with salt tolerant rice landrace (Harkuch) to identify salt tolerant rice lines. Thirty six F3 rice lines of Binadhan-5 x Harkuch were tested for salinity tolerance at the seedling stage in hydroponic system using nutrient solution. In F3 population, six lines were found as salt tolerant and 10 lines were moderately tolerant based on phenotypic screening at the seedling stage. Twelve SSR markers were used for parental survey and among them three polymorphic SSR markers viz., OSR34, RM443 and RM169 were selected to evaluate 26 F3 rice lines for salt tolerance. With respect to marker OSR34, 15 lines were identified as salt tolerant, 9 lines were susceptible and 2 lines were heterozygous. While RM443 identified 3 tolerant, 14 susceptible and 9 heterozygous rice lines. Eight tolerant, 11 susceptible and 7 heterozygous lines were identified with the marker RM169. Thus the tested markers could be efficiently used for tagging salt tolerant genes in marker-assisted breeding programme.DOI: http://dx.doi.org/10.3329/pa.v19i2.16929 Progress. Agric. 19(2): 57 - 65, 2008

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