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Showing 4 results for Karimizadeh
Davoud Sadeghzadeh-Ahari, Peyman Sharifi, Rahmatollah Karimizadeh, Mohtasham Mohammadi,
Volume 2, Issue 1 (5-2015)
Abstract
To estimate the genetic components and the mode of inheritance for some morphological traits, six rainfed durum wheat genotypes (Chehel daneh, Gerdish, Zardak, Syrian-1, Waha and Knd1149//68/ward) and their complete diallel progenies were grown in a randomized complete blocks design with two replications in 2005-06 cropping season in Maragheh Dryland Agricultural Research Station. Results of diallel analysis revealed that additive variance were important for inheritance of grain yield, number of grain per spike, spike length and number of fertile tiller than dominance variance. The positive value of ‘F’, indicated that there were excess of dominant alleles in comparison to recessive ones in the parents for all of the studied traits. The average degree of dominance (H1/D) 0.5 showed partial dominance for grain yield, number of grain per spike, spike length, 100 grains weight and number of fertile tiller and over-dominance for peduncle length. Graphic analysis indicated that increase of grain yield, number of grain per spike, spike length, 100 grains weight and number of fertile tiller were under the control of combination of recessive and dominance alleles. Predominance of additive effects for grain yield demonstrated that breeding methods based on selection may be advantageous in improving of this trait. The highest value of this trait relevant to Gerdish (10.33 g/plant), therefore this genotype can be used as cross parent in breeding programs for receiving to lines with high yield and yield components. The cross of Waha × Knd1149//68/ward with high value of GY and GCA for this trait can be used as a suitable cross for hybrid production.
M Mohtasham Mohammadi, K Rahmatollah Karimizadeh, H Tahmaseb Hosseinpour, G Hasan Ghojogh, S Kamal Shahbazi, S Peyman Sharifi,
Volume 4, Issue 2 (3-2018)
Abstract
Breeding of adapted and variation germplasm can be a main element for strength of research political in stable agricultture system. This is achived by targeting variety selection onto different growing environments under natural heat and drought stresses. To realize this, breeding programs usually undertake a rigorous genotypes performance evaluation across locations and years mostly at the final stage of variety development process. More accurate selection of wheat genotypes requires reducing environmental effects for explaining of their genetic potential with appropriate analysis of genotype × environment. In this research, 18 improved bread wheat genotypes were planted in randomized compelet block design with 4 replications in Gachsaran, Khoramabad, Gonbad, Moghan and Ilam stations during three years (2011-2014). Simple and combined analysis variance were done on grain yield data. Due to significant interaction effects for Year × locatin and genotype × year × locatin, yield stability of considered genotypes were analysed using some parameteric and nonparametric methods. Obtained results showed genotypes no. 10 and 17 with 3107 and 3028 kg/ha had the highest grain yield. Based on parametric statistics: CV i,  ,  ,  ،, MS Y/L and MSPI and non-paramertric statistics:  ,  ,  , Top, Mid, Low ،, R-Sum, and SDR, G10 had more yield stability. More over, G12 and G17 showed suitable yiled stability among high production genotypes. Earliness Genotypes 10 and 17 lines had optimum plant height and partially high thousand kernel weight.
Rahmatollah Karimizadeh, Tahmasb Hosseinpour, Jabbar Alt Jafarby, Kamal Shahbazi Homonlo, Mohammad Armion,
Volume 7, Issue 2 (3-2021)
Abstract
There are different methods for study the genotype × environment interactions and determining stable genotypes such as parametric, non-parametric and multivariate methods. In this research, 19 selective genotypes from advanced trials of durum wheat at 2011-2012 agronomic year, have been cultivated with Dehdasht check cultivar for three growing years (2012-2015) in five locations (including Gachsaran, Gonbad, Khorramabad, Moghan and Ilam) in a randomized complete block design with four replications in each location. Combined analysis of variance indicated significant effects of genotype, environment and interactions of genotype × environment. In parametric uni-variate methods, genotypes 7, 12, 18 and 20 were determined as stable genotypes. In non-parametric uni-variate methods, genotypes 2, 7, 12, 13, 18, 19 and 20 had the lowest genotype × environment interaction and they were determined as stable genotypes. In AMMI method, genotypes 2, 7, 12, 19 and 20 had the lowest rank in different environments and highest grain yield, and these genotypes seems more stable genotypes. It can be concluded that genotypes 7, 12, 18 and 20 could be considered as promising genotypes and candidate for introducing new durum cultivar.
Rahmatollah Karimizadeh, Tahmasp Hosseinpour, Peyman Sharifi, Jabar Alt Jafarby, Kamal Shahbazi, Kavoos Keshavarzi,
Volume 8, Issue 1 (8-2021)
Abstract
Durum wheat (Triticum turgidum L.), like most other crops, is affected by various stresses. Therefore, cultivars that, in addition to the ability to produce higher yields, can maintain their yield potential in different years and locations are considered superior cultivars. In order to obtain high-yielding and stable genotypes of durum wheat, 16 lines with two control cultivars Dehdasht and Seymareh were evaluated in four locations of Gachsaran, Gonbad, Khorramabad and Moghan based on randomized complete block design with four replications in three cropping seasons (2013-2016). Combined analysis of variance indicated a significant effect of genotype, environment and genotype by environment interaction. Genotypes G6 and G18 had the highest and lowest grain yield, respectively. Based on parametric methods, genotypes G3, G5, G15, G13 and G16 and based on non-parametric methods, genotypes G1, G3, G4, G5, G15 and G3 were the most stable genotypes. The most stable genotypes based on the total Kang sum-rank were genotypes G15, G5, G6 and G1. The Selection index of ideal genotype (SIIG) was used to integrate all indices into one index, based on which genotypes G5 and G15 were the superior genotypes with the highest SIIG index and grain yield. Based on all indices, genotypes G5 and G15 were the most stable genotype in terms of grain yield and can be used in cultivar introduction processes.
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