Showing 6 results for Mohammadinejad
Sara Abedini, Ghasem Mohammadinejad, Babak Nakhoda,
Volume 8, Issue 20 (3-2017)
Abstract
In order to study genetic diversity of different wheat inbred lines and grain yield modeling as well as selection of elite lines, 305 wheat lines derived from Roshan × Falat cultivar along with their parents as well as two check (Mahdavi and Shahpasand) cultivated in research field of Sahid Bahonar university of Kerman in augment design, on growing season of 2013-2014. Result of genetic and phenotype correlation has high coincidences together that shown infer low influence of environment error to relationship between evaluated traits. According to results of correlation analysis significant correlation was seen between grain yield and most of evaluated traits. Results of ANOVA of evaluated traits showed non-significant difference between check varieties in different incomplete blocks, this showed the homogeneity of experiment field. Stepwise regression model showed%81 changes of grain yield is justified by 1000 grain weight, number of grain per single plant, number of fertile tiller, plant hight and awn length. By factor analysis for the 13 evaluated traits shown%65 of variation in grain yield is justified by four factors, cluster analysis categorized the lines into three groups, the dendrogram revealed lines the third group of lines white the second group have significant difference. Evaluation of grain yield potential and phenotypic diversity measured traits lead to selection 40 better inbreed lines in this research. Results of this research showed number of grain per single plant, number of fertile tiller, grain filling period and awn length would be recommended traits for indirect selection for improvement grain yield.
Mrs Zahra Roudbari, Dr Hossein Shahsavand Hassani, Ghasem Mohammadinejad,
Volume 10, Issue 25 (6-2018)
Abstract
Although the non-Iranian primary tritipyrum lines (NIPTLs) have been produce and have shown potential to be a new slat tolerant cereal, however, have a few undesirable traits such as brittle rachis, keep in tiller production and late maturity. In order to remove these traits, the crossing of NIPTLs with Iranian bread wheat cultivars led to new recombinant Iranian secondary tritipyrum lines. In this study the 13 non-Iranian primary tritipyrum lines (NIPTLs: 2n = 6x = 42; AABBEbEb) and Iranian secondary tritipyrum lines (ISTL: F6-F7; 2n=6x=42, AABBD(1-6)"Eb(1-6)"), 6 Iranian bread wheat cultivars and 1 promising triticale line were evaluated at two research centers using an alpha lattice design with two replications under normal (1 dS m-1) and salinity stress ( 12dS m-1) conditions during growing seasons of 2014-2016 at Kerman province of Iran. The results indicated grain yield was strongly affected by salinity with reduction ratio of 11.06, 9.37, 4.30, 4.98, 7.98, 12.58, in Iranian chromosomally recombinant secondary individuals tritipyrum plants obtained from crosses such as (Cathlicum × Ma/b), (Falat× Ma/b), {Omid × (Ka/b)(Cr/b)}, {Niknejad × (Ka/b)(Cr/b)}, (Shotordandan × ka/b), (Roushan × Az/b), respectively, in comparison with Non Iranian Primay Ttritipyrum Lines (NIPRLs) (3.48), Iranian bread wheat cultivars (19.90) and promising triticale line (15.87) The evaluation of stress tolerance indices showed that STI could effectively be used for screening of salinity tolerant genotypes because it had the highest correlation coefficients with grain yield. The (Cr/b) × (Ka/b) line of NIPTLs and the lines obtained from Niknejad × (Ka/b)(Cr/b) and Omid × (Ka/b)(Cr/b) crosses showed the highest average breeding value which will be suitable for breeding programs of ISTLs lines with high yield potential in saline soils and brachish waters.
Jamileh Abedi, Amin Baghi Zadeh, Ghasem Mohammadinejad,
Volume 10, Issue 28 (12-2018)
Abstract
For QTL mapping of related salt tolerance QTLs and determining the contribution of each QTL to phenotypic variation, a population consisting of 96 F2:3 families derived from the cross Kharchia (parent tolerant) and Gaspard (susceptible parent) were evaluated during 2 years. Of the 92 microsatellite markers used to evaluate parents, 32 markers were polymorphic which were used for analysis. Three QTLs were found according to mapping composite interval method for plant height trait, which were located on chromosome 7D , 3B and 4B. In total, these QTLs explained 37 percent of phenotypic variation. Also, 3 QTLs were found on chromosome 7B and 7D for the size of seedling, which accounted for 38 percent of phenotypic variance were identified. For number of grains per spike and grain weight per main spike traits, 2 QTLs on chromosome 7D and 2 QTL for seed number trait on chromosome 4B. One QTL was found on chromosome 7D for each of the internode number and internode length traits which explained 12 and 11% of the phenotypic variance, respectively. For each of the number of spikelets, fertile tiller and spike length traits 1 QTL was found on chromosome 4B which explained 12% of the phenotypic variation. Genetic analysis of complex traits such as tolerance to salinity and identification of genetic locations controlling quantitative traits allow marker-assisted selection and ultimately improve the selection efficiency.
Amin Baghizadeh, Somayeh Mohammadinejad, Mehdi Rahimi,
Volume 11, Issue 29 (3-2019)
Abstract
For evaluation of the reaction of twenty red beans ecotypes to drought stress, an experiment was conducted in split plot as Randomized Complete Block Design with 3 replications in 2016-2017 at research field of Graduate University of Advanced Technology, Kerman, Iran. In this study, the main plots were three irrigation levels and sub-plot were twenty red beans ecotypes which they are sub-population from different regions of Iran. The results showed significant difference between stress levels and between ecotypes for all studied traits (chla, chlb, chlt, carotenoied, Redusing sugars, total porotein and prolin amino acid). Stress caused to significantly decrease in level 0.01 of chla, chlb, chlt, carotenoied, Redusing sugars, total porotein and caused to significantly increase in level 0.01 of prolin amino acid. There were 3 factors that explained 82 percent in non stress condition and 83 percent of total variations in moderate stress condition and 81 percent of total variations in severe stress condition. Cluster analysis (Ward) was used to categorize ecotypes based on biochemical traits. This study showed that the in tolerance of red bean plant to drought stress was most likely due to chlorophyll degradation, reduction in sugars and protein reduction. As a result, these biochemical changes have made the plant susceptible to drought stress.
Ms Jamileh Abedi, Dr Ghasem Mohammadinejad, Dr Amin Baghizadeh,
Volume 11, Issue 30 (9-2019)
Abstract
In order to identify microsatellite markers linked to some traits of wheat under drought stress at the end of the season, the population included 96 family F2:4 genotypes derived from the cross Kharchia (tolerant parent) and Gaspard (susceptible parent) were evaluated for 2 years. Of the 92 microsatellite markers used to assess parents, 32 markers were polymorphic that located on chromosomes 2B, 2D, 3B, 4A, 4B, 4D, 5A, 5B, 5D, 6B, 7A, 7B, 7D. Based on composite interval mapping was found 3 QTL for plant height trait which were located on chromosome 7B and the highest QTL with the largest LOD equal to 3.21 was located between Xgwm274 and Xgwm369 and justified 14.3 percent of phenotypic variation. For number of seeds per main spike trait, 1 QTL was detected on chromosome 2B and 1 QTL was identified on the chromosome 4B for harvest index trait. The common position of some of the located QTLs indicates a genetic linkage or pleiotropic effect. The saturation of the desired map and the evaluation of the stability of the studied traits can confirm the ability to identify the controller QTLs and provide the basis for Marker-Assisted Selection.
Dr Amin Baghizadeh, Mrs Mahdieh Aram Kasmaie, Dr Ghasem Mohammadinejad, Dr Babak Nakhoda,
Volume 11, Issue 31 (12-2019)
Abstract
Study of biochemical reactions of wheat cultivars to salinity stress can lead to identification of effective mechanisms for salinity tolerance. To determine the ion distribution pattern in wheat, and the effects of salinity stress and ion distribution on grain yield, this study was carried out. This research was conducted in a factorial experiment with two levels of salinity and six tolerant and sensitive wheat cultivars in two replications at research field of Shahid Bahonar University of Kerman on growing season of 2011-2012. The concentration of sodium (Na +), potassium (K +), magnesium (Mg2 +) ions and Na + / K + ratio in different tissues of the plant, including flag leaf, spike and root, and grain yield of each plant, were measured. The results of analysis of variance showed that the interaction effects of salinity on the cultivars were significant in most of the traits. The concentration of sodium ions from the roots to the shoots decreased significantly. With increasing salinity, K + concentration in root of all cultivars decreased significantly. Magnesium concentrations in leaf, spike and root decreased in salinity treatment compared to normal treatment. There was a significant difference between the cultivars in terms of Na+ / K+ ratio in all tissues and Moghan3 cultivar with the highest ratio in spike and root and Arta cultivar with the highest amount in flag leaf, were statistically in one group and other cultivars in the other group. According to the results of simple phenotypic correlation analysis, the sodium ion content in leaf, spike and root tissues had the highest and negative correlation with grain yield per plant. Regarding the reduction of wheat grain yield under salt stress conditions, one way to reduce the damage caused by salinity stress is through ion distribution regulation which can be done in different ways, including selection of tolerant and resistant cultivars against ionic changes.
