14374

12992

كارشناسي ارشد

ژنتيك و بهنژادي گياهي

اصفهان : دانشگاه صنعتي اصفهان

1397

يازده، ۹۲ص.: مصور، جدول، نمودار

قدرت اله سعيدي

احمد ارزاني، پرويز احسان زاده

محمدرضا سبزعليان، سعيد انصاري

1397/12/04

كتابنامه

كشاورزي

مهندسي كشاورزي

1397/12/05

ID12992

Genetic variation for some agronomic and physiological traits in safflower genotypes at two moisture regimes Masuod Saedi Saedi masuod@ag iut ac ir Janury 20 2019 Department of Agronomy and Plant Breeding Isfahan University of Technology Isfahan 84156 83111 Iran Degree M Sc Language Farsi1 st supervisor Ghodratollah Saeidi gsaeidi@cc iut ac irAbstractIn order to investigate the effect of drought stress on some agronomic and physiological traits ofsafflower a field experiment was conducted in Agricultural Research Farm of IsfahanUniversity of Technology Lavrak located at Najafabad In this study 21 safflower genotypeswere evaluated at two itrrigation regimes of non stress and stress condition by using arandomized complete block design with two replications in growing season of 2018 In thisexperiment the traits of days to 50 flowering days to full flowering days to maturity plantheight number of main branch per plant number of capitula per plant number of seeds percapitulum 1000 seed weight seed oil content grain yield per plant and grain yield per unit area RWC MSI chlorophyll a and b and carotenoids concentration were measured The resultsshowed that the effect of drought stress on all studied traits was significant and the traits ofnumber of heads per plant and chlorophylls a and b concentration were more affected bydrought stress than the other traits Under stress conditions there was a positive correlationbetween grain yield per unit area with each of plant height number of main branch per plantand number of capitula per plant leaf relative water content membrane stability andcarotenoids content The results of stepwise regression for grain yield per unit area showed thatin non stress conditions plant height and membrane stability index were entered to the modeland explained 70 of its variation However under moisture stress condition number ofcapitula per plant day to 50 flowering carotenoids content and membrane stability indexwere more important traits and explained 77 of the grain yield variation The results of pathanalysis for grain yield per unit area showed that in both moisture conditions number ofcapitula per plant had the most direct and positive effects on grain yield The highest indirectand negative effects in stress condition belonged to 1000 seed weight To determine the droughttolerance of the genotypes tolerance and sensitivity indices SSI TOL GMP STI and MP were calculated Considering the correlation coefficients GMP and STI indices were ecognized ras more suitable indices for determining more tolerant and high yielding genotypes Also physiological traits of leaf relative water content and carotenoids content were highly correlatedwith GMP STI and MP indices The biplot diagram showed that genotypes A2 and M420 weremore tolerant genotypes with higher yield potential and more leaf relative water content andcarotenoid content Key Words Genetic Variation Drought stress Safflower Agronomy andPhysiological traits 23

قدرت اله سعيدي

احمد ارزاني، پرويز احسان زاده

محمدرضا سبزعليان، سعيد انصاري