7374

6880

كارشناسي ارشد

اصلاح نباتات

اصفهان: دانشگاه صنعتي اصفهان، دانشكده كشاورزي

1391

چهارده، 91ص.: مصور، جدول، نمودار

ص.ع. به فارسي و انگليسي

احمد ارزاني، محسن اسماعيل زاده مقدم

پرويز احسان زاده

21/9/91

محمد مهدي مجيدي، مصطفي مبلي

1396/09/21

كتابنامه

كشاورزي

مهندسي كشاورزي

ID6880

به فارسي و انگليسي: قابل رويت در نسخه ديجيتالي

94Study Moisture Stress in Recombinant Inbred Lines in Wheat Triticumaestivum in Field Conditions Hadi Shahbazi h shahbazi@ag iut ac ir Date of Submission 11 September 2012 Department of Agronomy and Plant Breeding Isfahan University of Technology Isfahan 84156 83111 IranDegree M Sc Language FarsiSupervisor Ahmad Arzani a arzani@cc iut ac irMohsen Esmailzadeh Moghadam esmaeilzadehmohsen@ymail comAbstract Drought stress as the most important abiotic stress plays an important role in the yield reduction ofcrop plants worldwide For improvement of complex traits such as yield possessing low heritability indirect selection is applied using other traits viz morph physiological traits The study of physiologicalresponse of different lines to water stress could be beneficial in understanding of the mechanisms ofdrought resistance Therefore this study was conducted to evaluate the effect of water stress on themorphological physiological and grain quality of 169 recombinant inbred lines RILs in wheat Triticumaestivum using two separate lattice design drought and control at Research Farm of Isfahan Universityof Technology Two moisture regimes of 70 and 130 mm evaporation from evaporation pan class A 16 and 12 moisture by weight of soil respectively were used Drought stress reduced the chlorophyllcontent a b a b leaf width leaf length peduncle length plant height flag leaf area while increasedproline content Although drought stress increased the proline content of leaves and reduced pedunclelength and flag leaf area in both sensitive and tolerant lines tolerant lines have been less affected thansensitive lines Results of analysis of variance revealed significant differences among lines for most ofstudied traits under normal conditions with the exception of proline content flag leaf area and plantheight Under moisture stress conditions the RILs significantly differed for the studied traits with theexception of flag leaf area The results of combined analysis of variance showed that the traits weresignificantly affected by water stress with the exception of leaf area The correlation coefficients revealedthat traits related with proline content leaf width leaf length peduncle length plant height and flag leafarea had positive effect on grain yield under moisture stress Under similar conditions carbohydrate andgrain ash contents had significant and negative correlation with protein content Water absorption grainhardness Zeleny sedimentation volume and bread volume correlated positive and significantly withprotein content Proline content had significant and positive correlation with grain yield The results offactor analysis indicated 9 and 8 factors explaining 91 84 and 96 88 of total variation of yields undernormal and stress conditions respectively The results of stepwise regression showed that leaf width testweight protein content and peduncle length contributed in 35 of observed variation for grain yield undernormal conditions Under stress conditions test weight protein content grain ash grain moisture chlorophyl a content plant height and flag leaf area contributed in 48 of observed variation for grainyield According to the results of present study drought tolerant RILs possessing desirable grain qualitycan be used to improve wheat Word key Recombinant inbred lines Lattice design Zeleny sedimentation Test Weight drought stress

احمد ارزاني، محسن اسماعيل زاده مقدم

پرويز احسان زاده

محمد مهدي مجيدي، مصطفي مبلي