:: Volume 7, Issue 2 (2021) ::
pgr 2021, 7(2): 55-64 Back to browse issues page
Determination of QTLs Controlling Agronomical Traits in Rice Population Derived from Cross of Tarom Landrace and Tarom Mutant
Mahnaz Katouzi , Saeid Navabpour , Hossein Sabouri * , Ali Akbar Ebadi
Department of Plant Production, Faculty of Agriculture and Natural Resources, Gonbad Kavous University, Gonbad Kavous, Iran , hossein.sabouri@gonbad.ac.ir
Abstract:   (7376 Views)
In order to identify QTLs controlling agronomically traits, landrace Tarom and rice Tarom mutant were crossed. SSR, ISSR, iPBS and IRAP markers were amplified in 250 F2 individuals to prepare the linkage map. Number of tillers, 100 grain weight, number of filled grains, number of unfilled grains, plant height, panicle length, number of branches, stem diameter, grain length, grain width, grain shape, straw weight, days to maturity, flag leaf length and flag leaf width were measured for 250 individuals. The linkage map covered 970.9 cM of rice genome. The distance between two adjacent markers was calculated to be 12.77 cM. Based on the results, a total of 13 QTLs were identified for the evaluated traits. For all studied traits, alleles transferred from the parents to the QTLs detected increased grain yield. Most QTLs were detected for days to flowering. Three QTLs were located on chromosomes 10 and 4 (two QTLs) for days to flowering. qLDF-4a and qLDF-4b had a negative additive effect and the parent alleles of the mutant landrace Tarom reduced the number of days to flowering. These QTLs explained 11.6% of the phenotypic variance. Since the population under study was derived from a cross between landrace and mutant Tarom cultivars and the resulting population varied only in the mutated genes; so, the QTLs detected in this study were more accurate in location and expression levels, and after validation of them, they could be recommended for marker assistant selection breeding programs.
Keywords: Rice, Mutant, Molecular marker, Linkage map, QTL
Full-Text [PDF 593 kb]   (1370 Downloads)    
Type of Study: Research | Subject: Population genetics
Accepted: 2019/10/21
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