Masuod Bakhshayeshi Geshlagh
Volume 13, Issue 2 , March 2012, , Pages 41-49
Abstract
In order to study adapatability and yield stability of irrigated bread wheat cultivars Alvand, Alamout, Zarrin, Navid, Azar 2, Sabalan, Omid and Bezostiya this experiment was conducted in RCBD during three cropping seasons (2007-2010) in six cities. Simple ANOVA and combined analysis of variance for ...
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In order to study adapatability and yield stability of irrigated bread wheat cultivars Alvand, Alamout, Zarrin, Navid, Azar 2, Sabalan, Omid and Bezostiya this experiment was conducted in RCBD during three cropping seasons (2007-2010) in six cities. Simple ANOVA and combined analysis of variance for three years in every location and also combined analysis of variance for three years and six locations were implemented. Lin and Binns parameter, environmental variance, Rick Ecovalance method and Shukla stability variance were used for determination of stable cultivars. Results of combined ANOVA (three years × six locations) showed that interaction effect of year × location × genotype was significant. The highest and lowest grain yield belonged to Alvand (3/74 tha1) and Azar 2 (2/72 tha1) cultivars. Results of stability analysis with Lin and Binns method showed that Zarrin cultivar had the lowest inside location variance for grain yield and the lowest environmental variance belonged to Azar 2 cultivar. Results of stability analysis with Shukla Stability variance method showed that Zarrin and Sabalan cultivars had the lowest Shukla stability variance, respectively. Also results of Rick Ecovalance method showed that Zarrin cultivar had the highest amount for this parameter. Zarrin and Sabalan cultivars had the lowest yield stability and can be recommended for studied locations.
Hossein Ghorbani Mandolakani; Manoochehr Khodarahmi; Farrokh Darvish; Mohammad Taeb
Volume 12, Issue 1 , May 2010, , Pages 59-67
Abstract
In order to determine the relationship between yield and some morphological and physiological traits, as well as important traits that affect grain yield in bread wheat, a field experiment was conducted at Cereal Research Farm, Seed and Plant Improvement Institue, KaraJ in 2007. Three hundred and thirty ...
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In order to determine the relationship between yield and some morphological and physiological traits, as well as important traits that affect grain yield in bread wheat, a field experiment was conducted at Cereal Research Farm, Seed and Plant Improvement Institue, KaraJ in 2007. Three hundred and thirty five bread wheat recombinant inbred lines were evaluated in an Alpha Lattice design with two replications. Grain yield was positively correlated with all of the yield components, but was negatively correlated with days to heading, days to anthesis, days to ripening, extrusion peduncle length and second internode length. In stepwise regression, grain production rate was the first variable entered in the model and explained a higher percentage variation in grain yield. Path analysis showed that grain production rate and biological yield (0.534 & 0.532) exerted the most direct effects on grain yield. On the basis of these result, it is suggested that criteria such as number of spike per m2, number of grain per m2, seed weight per spike, biological yield production rate , grain production rate and biological yield could be considered as effective criteria for selecting towards grain yield improvement in bread wheat.
Davud Afyuni; Ali Reza Marjovvi
Volume 11, Issue 2 , November 2009, , Pages 1-10
Abstract
In order to evaluate salinity tolerance of six bread wheat varieties, an experiment was conducted during 2000-02 crop seasons in Roudasht Salinity Research Station, Esfahan. Effects of three levels of irrigation water salinities (four, eight and 12 dS m-1) were studied on six bread wheat cultivars including ...
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In order to evaluate salinity tolerance of six bread wheat varieties, an experiment was conducted during 2000-02 crop seasons in Roudasht Salinity Research Station, Esfahan. Effects of three levels of irrigation water salinities (four, eight and 12 dS m-1) were studied on six bread wheat cultivars including Pishtaz, Shiraz, Mahdavi, Marvdasht, Kavir and Roshan. Increase in salinity level of irrigation water caused significant decrease in grain yield, number of spikes per m2, days to physiological maturity, plant height and grain filling period. Among the varieties, Roshan and Shiraz had the minimum reduction percentage in grain yield in 12 dS m-1 compared to 4 dS m-1. In 12 dS m-1, Roshan and Shiraz produced 3987 and 3607 kg ha-1 grain yield, respectively and had the highest grain yield values among the varieties. Roshan also had the highest amounts of MP, GMP and STI (4257, 4248 and 1.20, respectively) and the lowest amounts of Tol and SSI (539 and 0.66, respectively), thus was the most tolerant cultivar to salinity among the studied cultivars. Based on the tolerance and susceptibility indices, Marvdasht was the most susceptible cultivar to salinity.