@article{ author = {Molaei, Bafrin and Moghaddam, Mohammad and Alvaikia, Seyed Siamak and Bandeh-Hagh, Ali}, title = {Generation Mean Analysis for Several Agronomic and Physiologic Traits in Bread Wheat under Normal and Water Deficit Stress Conditions}, abstract ={This experiment was conducted during 2013-2014 in Tabriz University research farm, Iran. In this research, the inheritance of some agronomic and physiological traits in different generations of Bam (tolerant to drought) and Artha (sensitive to drought) cross was studied in field conditions by generation mean analysis. The experiment was a split plot design using randomized complete blocks with two replications with the irrigation conditions in the main plots and generations in the sub-plots. The interaction between generations and irrigation conditions was significant only for grain yield. Based on the result of generation means analysis for the spike length and straw weight, the threeparameter model was found fitting the analysis. For the thousand-seed weight in the water stress condition and for the plant weight in the irrigation condition, a non-significant chi-square suggesting that the six-parameter model for these traits is suitable. For the other traits, the chi-square was significant in both conditions. For spike length and leaf area, the degree of dominance was greater than one (2.3 and 1.53, respectively) which showed the existence of over-dominance gene action in controlling these traits. Straw weight in normal condition, leaf area and thousand seed weight in the stress condition had a high broad-sense heritability. The narrow-sense heritability for all other traits was low, suggesting the need for exploiting dominance gene action in the breeding programs if hybrid varieties are produced in the bread wheat.}, Keywords = { Interaction effects, Generation mean analysis, Heritability, Wheat}, volume = {3}, Number = {2}, pages = {1-10}, publisher = {Lorestan University}, doi = {10.29252/pgr.3.2.1}, url = {http://pgr.lu.ac.ir/article-1-95-en.html}, eprint = {http://pgr.lu.ac.ir/article-1-95-en.pdf}, journal = {Plant Genetic Researches}, issn = {2383-1367}, eissn = {2676-7309}, year = {2017} } @article{ author = {Darvishzadeh, Reza and MousaviAndazghi, Mir Javad and FayyazMoghaddam, Amir and AbbassiHolasou, Hossein and Alavi, Seyyed Rez}, title = {Genetic Analysis of Morphological Traits in Oriental Tobacco (Nicotina tabacum L.) by Using Generation Mean Analysis}, abstract ={In order to evaluate heritability and gene action for some of the important quantitative traits in oriental tobacco, two genotypes, Basma 16-10 and SPT406 were crossed with Basma S. 31 cultivar, separately in 2009-2010. Parents with F1, F2, BC1 and BC2 generations were planted in a randomized complete block design with three replications. Traits such as plant height, leaf length, leaf width, leaf number, internnode number, stem diameter and yield per plant were recorded. The results obtained from analysis of variance indicated that generations mean squares were statistically significant for all traits expect for stem diameter. Therefore, generation mean analysis was performed for significant triats to estimate gene actions using Chi-square and scaling tests. The Chi-square of simple three-parametric model (additive-dominance model) was significant for studied crosses, indicating the presence of non allelic-interactions in the inheritance of these traits in oriental tobacco. Both additive and dominance genetic effects were significant for plant height, leaf length, leaf width, leaf number and internnode number. In addition, presence of high amount of dominance effect and dominance × dominance interactions suggests the importance of non-additive genetic effects for these traits in oriental tobacco. Therefore, selection for these traits in early generations can not be successful. However, additive genetic effects play an important role in the inheritance of yield, and then selection for this trait is hopeful in early generations during tobacco breeding process.}, Keywords = {Generation mean analysis, Genetic diversity, Morphological traits, Oriental tobacco}, volume = {3}, Number = {2}, pages = {11-24}, publisher = {Lorestan University}, doi = {10.29252/pgr.3.2.11}, url = {http://pgr.lu.ac.ir/article-1-96-en.html}, eprint = {http://pgr.lu.ac.ir/article-1-96-en.pdf}, journal = {Plant Genetic Researches}, issn = {2383-1367}, eissn = {2676-7309}, year = {2017} } @article{ author = {Sharifi, Peyman and Aminpanah, Hashem}, title = {Evaluation of Genotype × Environment Interactions, Stability and a number of Genetic Parameters in Rice Genotypes}, abstract ={In order to investigate yield stability, genotype×environment interactions and estimation of a number of genetic parameters related to yield and yield components, seven promising rice lines together with Shirodi and line 843 (as control cultivars) were evaluated. The experiment was carried out base on randomized complete block design with three replications in three locations of Mazandaran province, Iran (Tonekabon, Amol and Sari) during three growing seasons from 2012 to 2014. Analysis of variance revealed that there were significant differences among genotypes for yield at almost all three locations. Combined analysis of variance indicated that there were no significant differences among locations and years, whereas year×location×genotype interaction was found significant for grain yield, plant height and thousand grain weight. Results of stability analysis by univariate methods showed that genotype number 6 was the most stable genotype over all three locations, having less variance within locations and smaller coefficients of variance and a high grain yield (6020.8 kg ha-1 ). The high coefficient of phenotypic and genotypic variation was indicative to genetic variability for all of the studied traits. The broad-sense heritability ranged from 49.06% (plant height) to 92.48%% (number of filled grain per panicle) and was 59.46% for grain yield. The highest phenotypic and genotypic coefficients of variation and genetic gain over total average obtained for the number of grains per panicle. Thus, it is possible to improve this trait by selection method and could be used as a selection index to improve grain yield. Overall, genotype number 6 could be considered as a superior genotype to achieve a dwarf cultivar with stable yield. }, Keywords = {Evaluation of Genotype × Environment Interactions, Stability and a number of Genetic Parameters in Rice Genotypes}, volume = {3}, Number = {2}, pages = {25-42}, publisher = {Lorestan University}, doi = {10.29252/pgr.3.2.25}, url = {http://pgr.lu.ac.ir/article-1-97-en.html}, eprint = {http://pgr.lu.ac.ir/article-1-97-en.pdf}, journal = {Plant Genetic Researches}, issn = {2383-1367}, eissn = {2676-7309}, year = {2017} } @article{ author = {ArabTajandarreh, Esmail and Ismaili, Ahmad and RezaeiNejad, Abdolhossein and Karami, Farh}, title = {Assessment of Genetic Diversity and Heritability of Physiological and Phenological Characteristics of some Strawberry (Fragaria × ananassa Duch.) Genotypes under Climatic Conditions of Kurdistan, Iran}, abstract ={Strawberry (Fragaria × ananassa Duch.) is one of the important and commercial small fruits that are planted in temperate regions which contain high amount of natural antioxidants. Study of genetic diversity is very important for distinguish the genotypes relationships and evaluation and exploitation of genetic resources for breeding programs. To evaluate the physiological and phenological characteristics of strawberries genotypes, an experiment was carried out using a randomized complete block design with 3 replications in the Agricultural Research Center of Kurdistan, Iran. Physiological parameters (amount of chlorophyll a, b and ab, soluble solids, titratable acidity and anthocyanin) and phenological characters (appearance of first stolon, first flower and first fruit, flowering and fruiting period) and yield of genotypes were evaluated. Results of analysis of variance showed significant differences among genotypes for all traits at the 1% level of probability, indicating the existence of genetic diversity among genotypes. The results of mean comparison showed significant differences among genotypes for all traits, indicating existence of wide diversity among the studied strawberry genotypes. The highest chlorophyll content belonged to Paros genotype and the highest yield recorded from Queen Eliza and Gaviota genotypes, respectively. The highest anthocyanin and soluble solids content was belonged to Gaviota and lowest amount of these parameters belonged to Paros and Chandler genotypes and Chandler genotype also had the highest amount of chlorophyll a. There were little difference between phenotypic and genotypic coefficient of variation, indicating the low effect of environment on these characters. All traits had high common heritability with range of 82-99 %. Data were analyzed using principal factor analysis. The factor analysis technique extracted four factors. Four factors explained about 74.05% of the total variation, and 50.84% of the variance was accounted for by the two first factors. Factors I and II were identified as photosynthetic, and fertility Index, respectively. According to results of factor analysis and other analysis, Paros genotype was identified as suitable cultivar.}, Keywords = {Strawberry, Genotypic coefficient of variation, Chlorophyll, Factor analysis}, volume = {3}, Number = {2}, pages = {43-58}, publisher = {Lorestan University}, doi = {10.29252/pgr.3.2.43}, url = {http://pgr.lu.ac.ir/article-1-98-en.html}, eprint = {http://pgr.lu.ac.ir/article-1-98-en.pdf}, journal = {Plant Genetic Researches}, issn = {2383-1367}, eissn = {2676-7309}, year = {2017} } @article{ author = {Barajehfard, Mohsen and Siahpoosh, Mohammad Reza and Modarresi, Mohamm}, title = {QTLs Associated with Stemlet and Rootlet Growth in the Early Stages of Germination of Wheat}, abstract ={In order to identify QTLs associated with stemlet and rootlet growth in the early stages of germination of wheat, 144 recombinant inbred lines derived from the cross of Kaz and Mantana were evaluated in a completely randomized design. The linkage map using composite interval by 234 microsatellite (SSR) primers and 267 AFLP loci have been already prepared in this population which covered 20 chromosomes of wheat. For root length, 1, 2 and 2 QTLs were located on 4D, 4B and 2D chromosomes, respectively. Two QTLs of rootlet length was located on 6B and 3D chromosomes. The QTLs of rootlet number were identified on 4A, 5A and 3B chromosomes. For each of stemlet dry weight (SDW) and rootlet dry weight (RDW) traits only one QTL identified on 4A and 3D chromosomes, respectively. Overall, for SDW to RDW ratio on 2D and 3D chromosomes, three QTLs were located. The QTLs of stemlet wet weight (SWW) were detected on 6B and 2B chromosomes. On 1B, 2D and 6B chromosoms, three QTLs were recognized for SWW to RWW ratio. For all traits, the range of LOD = 2.04-6.34 and R2 =5.11-19.58 were calculated. The highest amount of LOD and R2 (5.11 and 19.58, respectively) were obtained for rootlet length QTL (QSL-chpgu-4D). The least distance to the nearest adjacent marker (AFgcCGb marker) was 0.005 Centi-Morgan which belonged to rootlet length QTL (QRL-chpgu-3D) on 3D chromosome.}, Keywords = { Stemlet, QTL, Seedling, Wheat, Rootlet }, volume = {3}, Number = {2}, pages = {59-68}, publisher = {Lorestan University}, doi = {10.29252/pgr.3.2.59}, url = {http://pgr.lu.ac.ir/article-1-99-en.html}, eprint = {http://pgr.lu.ac.ir/article-1-99-en.pdf}, journal = {Plant Genetic Researches}, issn = {2383-1367}, eissn = {2676-7309}, year = {2017} } @article{ author = {MirDrikvand, Rez}, title = {Investigation of Heritability of Morphological Traits and Genetic Diversity among Rainfed Barley Genotypes Using Molecular and Morphological Markers}, abstract ={Identification and application of genetic diversity are essential to breeding programs success. In this study, genetic diversity of 20 rainfed barley genotypes were assessed using morphological traits as well RAPD and intron-exon splice junction (ISJ), semi-random markers. Results of this study showed that there were significant differences among genotypes for all traits, indicating high genetic variation among them. The highest and lowest broad sense heritability was related to spike length and grain yield, respectively The estimates of genotypic coefficient of variation (GCV) and phenotypic coefficient of variation (PCV) were high for number of grain per spike, and low for 1000-kernel weight, respectively. Mean of polymorphic percentage in ISJ marker was higher than RAPD marker. Cluster analysis showed that the distinctions based on morphological traits did not correspond with the distinction based on molecular data.The results showed that RAPD and ISJ markers were able to distinct two and six-rowed and also hulless and hulled barley genotypes. Distinction of three clusters did not follow the same pattern.There was significant and negative correlation between similarity matrices of molecular data and morphological traits, but similarity matrices of two molecular markers was significantly and positively correlated.}, Keywords = {Rainfed barley, Genetic diversity, Molecular markers, Heritability}, volume = {3}, Number = {2}, pages = {69-82}, publisher = {Lorestan University}, doi = {10.29252/pgr.3.2.69}, url = {http://pgr.lu.ac.ir/article-1-100-en.html}, eprint = {http://pgr.lu.ac.ir/article-1-100-en.pdf}, journal = {Plant Genetic Researches}, issn = {2383-1367}, eissn = {2676-7309}, year = {2017} }