5285

4955

كارشناسي ارشد

اصلاح نباتات

اصفهان: دانشگاه صنعتي اصفهان، دانشكده كشاورزي

1388

دوازده،97ص.:مصور،جدول،نمودار

ص.ع.به فارسي و انگليسي

آقا فخر مير لوحي،محمد مهدي مجيدي

قدرت ا.. سعيدي

29/3/89

خورشيد رزمجو، نعمت ا.. اعتمادي

مهندسي كشاورزي

ID4955

به فارسي و انگليسي: قابل رويت در نسخه ديجيتالي

Department of Agronomy and Plant Breeding Isfahan University of Technology Isfahan 84156 83111 Iran Degree M Sc Language FarsiSupervisor A F Mirlohi mirlohi@cc iut ac ir AbstractTo evaluate drought tolerance in cultivated Carthamus tinctorius L and wild safflower C oxacantha Bieb populations anexperiment was conducted at research farm of College of Agriculture Isfahan University of Technology located at Lavark Nafafabad in 2008 A randomized completed block design with 3 replications was used in each of three environmental conditionsof irrigation after 80 130 and 180 mm evaporation from class A pan respectively Evaluation of morphological traits and resultsof variance analysis revealed a significant difference among genotypes for all studies traits There was a considerable variation fornumber of heads per plant and wild safflower had significantly higher value for this trait Moisture stress also had a significanteffect on all studied traits Clear differences existed between the two species cultivated and wild for moisture stress tolerancewith the wild species being more tolerant than the cultivated one Increasing water stress level caused significant reduction in theseed yield of cultivated genotypes whereas the wild genotypes were not affected as much Correlation coefficient for cultivatedsafflower showed that number of seed per head days to flowering head weight and plant height had a positive correlation withseed yield Similarly number of heads per plant plant height and seed weight per head had positive correlation with seed yield inwild safflowers Factor analysis revealed four factors in cultivated genotypes under non stress condition and three factors atintense moisture stress level which justified 90 and 75 percent of the total variation respectively Also factor analysis of wildspecies showed that the first there factors justified more than 80 percent of total variation at both moisture stress levels Resultsof cluster analysis showed that all studied genotypes were clustered in 3 groups which wild genotypes were grouped in the samecluster Results indicated that the Stress Tolerance Index STI is an effective selection criterion for identification and introductionof tolerant genotypes Based on this index among cultivated genotypes Koseh at mild drought stress level and Kashan at intensestress level were the most tolerant accessions Similarly among wild genotypes Azary at mild drought stress level and Lavark atintense stress level were the most tolerant accessions Results of principle component analysis PCA and its biplot analysisshowed that the two first components justified more than 80 percent of total variation for both mild and intense stress levels andthey were named potential component and sensitivity to stress At both moisture stress levels cultivated accessions Kashan M113 and M115 were identified as genotypes with high yielding potential and less sensitive to moisture stress Similarly among wild accessions Kermanshah and Lavark performed best at mild and intense conditions respectively Key words cultivated safflower wild safflower drought stress STI index biplot analysis Isfahan University of Technology

آقا فخر مير لوحي،محمد مهدي مجيدي

قدرت ا.. سعيدي

خورشيد رزمجو، نعمت ا.. اعتمادي