QTLs Mapping of Morpho-Physiological Traits of Flag Leaf in Steptoe × Morex Doubled Haploid Lines of Barley in Normal and Salinity Stress Conditions
Journal Title: International Journal of Farming and Allied Sciences - Year 2016, Vol 5, Issue 5
Abstract
Salt tolerance is a complex trait that involves multiple physiological and biochemical mechanisms and numerous genes. The identification of genes whose expression enables plants to tolerance salt stress is essential for breeding programs. In order to a doubled haploid line (DHL) population with 72 lines derived from a cross of ‘Steptoe/Morex’ was used to identify quantitative trait loci (QTL) of morpho-physiological traits in barley (Hordeum vulgar L.). This experiment was carried out in the Research Farm, College of Agriculture, University of Zabol, Zabol, Iran, in growing year 2012. It was arranged as in two randomized complete block design (RCBD) with two replicates and two normal and salinity stress conditions. Morpho-physiological traits of DHLs were measured in two environments. Analysis of variance (ANOVA) results showed that there were significant differences among the lines. Transgressive segregation in both directions was significant for flag leaf length, flag leaf width, flag leaf area and chlorophyll contents. The strongest positive correlations were observed between flag leaf length and flag leaf width (r = 0.994**). QTL analysis was conducted by composite interval mapping (CIM) method separately for each trait in each conditions and mean of two conditions. Twenty-nine QTLs were identified for the studied traits. Phenotypic variance explained by these QTLs variable from 8.66 to 29.94. Highest LOD scores were obtained for flag leaf area (QFla2n) on 2H chromosome in normal conditions.
Authors and Affiliations
Habibeh Shahraki, Barat Ali Fakheri
Keywords
Related Articles
- EP ID EP32862
- DOI -
- Views 357
- Downloads 0
Effect of Different Culture Media and Plant Growth Regulators on Callus Induction of Stevia Rebaudiana
The main objectives of this present study were to develop the optimal concentratioand combination of auxin and cytokinin for optimized callus induction through seeds implanting in MS medium. stevia is cultivated by see...
Effects of altitude on essential oil composition of Stachys inflata Benth
The essential oils from the aerial parts of Stachys inflata (Lamiaceae), collected at different altitudes in Fars province, in flowering stage, were obtained by hydro-distillation. The chemical components of the essent...
Screening landraces of bread wheat genotypes for drought tolerance in the field and laboratory
In order to study the response of twenty bread wheat (Triticum aestivum L.) landraces to drought stress two experiments were conducted in the field and laboratory using randomized complete block design and completely r...
GENDER DYNAMICS IN THE ACCESS TO AND CONTROL OF BENEFITS ACCRUED FROM TEA FARMING IN KIGANJO DIVISION, GATUNDU DISTRICT
Agriculture is the cornerstone of Kenya’s economy with most households depending on it for food and livelihood. Women provide the largest share of agricultural labour in many households. Despite the important role that...
Water consumptive use of Radish (Rhapanus sativus L. Var sativus), as influenced by varying temperatures
Seeds of Topsi, Famox F1, Corox F1, and Altox F1 radish cultivars germinated in controlled 20 and 12oC cabinets. The objective of this experiment was to determine water consumptive use, water use efficiency and irrigat...