پديد آورنده :
نوروزي، عباس
عنوان :
بررسي تنوع ژنتيكي و تاثير تنش خشكي بر عملكرد و اجزاي عملكرد برخي ژنوتيپ هاي فسكيوي بلند
مقطع تحصيلي :
كارشناسي ارشد
گرايش تحصيلي :
اصلاح نباتات
محل تحصيل :
اصفهان: دانشگاه صنعتي اصفهان، دانشكده كشاورزي
صفحه شمار :
دوازده، 112ص.: مصور، جدول، نمودار
يادداشت :
ص.ع. به فارسي و انگليسي
استاد راهنما :
محمد مهدي مجيدي، محمدرضا سبز عليان
استاد مشاور :
آقافخر ميرلوحي، مهدي قيصري
توصيفگر ها :
عملكرد بذر , شاخص تحمل به خشكي
تاريخ نمايه سازي :
16/8/91
استاد داور :
قدرت اله سعيدي، نعمت اله اعتمادي
تاريخ ورود اطلاعات :
1396/09/20
چكيده فارسي :
به فارسي و انگليسي: قابل رويت در نسخه ديجيتالي
چكيده انگليسي :
Study of Genetic Variation and Effect of Drought Stress on Yield and its Components in Tall Fescue Festuca arundinacea Genotypes Abbas Noroozi abbas noroozi22@yahoo com Date of Submission August 2012 Department of Agronomy and Plant Breeding Isfahan University of Technology Isfahan 84156 83111 Iran Degree M Sc Language Farsi Supervisors Mohammad Mahdi Majidi majidi@cc iut ac ir Mohammad Reza Sabzalian sabzalian@cc iut ac irAbstractDrought stress as the most important abiotic stress plays an important role in yield of plantsworldwide This study was conducted to evaluate drought tolerance of 75 tall fescue genotypes Festuca arundinaceae based on morphological physiological and seed production traits atresearch farm of college of agriculture Isfahan university of technology located at lavark Najafabad during 2011 and 2012 The genotypes consisted of 25 parental lines along with theirtwo sets of 25 progenies selected based on contrasting maturity date early and late These threesets of genotypes were evaluated under moisture stress and non stress according to a split design Results showed that drought stress significantly affected all the measured seed traits except fordays to ear emergence and days to pollination The three sets differed significantly except fortwo traits panicle length and the number of seeds per plant There were significant differencesamong 75 genotypes for all of the measured seed traits as well as forage production andmorphological traits indicated a broad genetic diversity in this germplasm Factor analysis for allof the traits revealed five factors under non stress and stress condition which justified more than80 percent of the total variation The results of stepwise regression showed that number of grainsper panicle the number of fertile spikes and weight of thousand grain contributed in 90 ofobserved variation for grain yield under non stress condition Under stress the same traitscontributed in 88 of the observed variation for grain yield Path coefficient analysis showedthat the number of fertile spikes per plant had the most direct effect on seed yield under bothmoisture environments Analysis of variance of drought tolerance and susceptibility indicesbased on seed yield under stress and non stress condition showed that there were significantdifferences among all indices indicating that these indices can be used for selection of tolerantgenotypes Among the calculated indices stress tolerance index STI and geometric meanproductivity GMP were identified as the superior indices for selection of drought tolerantgenotypes under field condition According to the results of present study it is concluded that thegenotype number 3 from early set and genotype number 15 from parental set both native to Iran had high forage and seed yield and more drought tolerance which can be used for future breedingprograms to develop superior varieties for arid region Key words Tall fescue seed yield drought stress stress tolerance index
استاد راهنما :
محمد مهدي مجيدي، محمدرضا سبز عليان
استاد مشاور :
آقافخر ميرلوحي، مهدي قيصري
استاد داور :
قدرت اله سعيدي، نعمت اله اعتمادي
