ارزيابي صفات زراعي در لاين هاي M4 حاصل از القاي موتاسيون و شناسايي لاين هاي موتانت مطلوب در كلزا ﴿.Brassica napus L﴾

چكيده انگليسي :

Evaluation of Agronomic Traits in M4 Lines Derived from Induced mutation and Identification of Desirable Mutant Lines in Canola Brassica napus L Majid Shojaei majid shojaei@ag iut ac ir 22 September 2013 Department of Agronomy and Palnt Breeding Isfahan University of Technology Isfahan 84156 83111 IranDegree M Sc Language FarsiSupervisors Ahmad Arzani a arzani@cc iut ac ir Ghotratollah Saeidi gsaeidi@cc iut ac irAbstractConsidering the importance of canola Brassica napus L as an oilseed crop and its high statusamong other oilseed crops improvement of the yield and oil content is important In order toinvestigate and evaluate the of agronomic traits in M4 lines resulting from the induction ofmutations and identification of desirable mutant lines an experiment with 10 10 simple latticedesign and two replications have been conducted in Agricultural Research Station of IsfahanUniversity in 2011 to 2013 In this experiment 94 mutant lines of Sarigol and RGS 003 variety bygamma rays were evaluated with presence of 6 control lines Agronomic characteristics comprised days to flowering days to maturity plant height number of pods per main branch number ofbranches number of pods per plant seeds per pod seed weight seed yield per plant yield per unitarea biological yield harvest index resistance to aphid and resistance to seed shattering and seedoil content for some of lines were measured Analysis of variance showed that there are highlysignificant differences between lines p 0 01 for all traits Simple latice design possessed equal orless efficiency than randomized complete block design RCBD for day to flowering day tomaturity number of sub branch number of pod per main branch number of seed per pod numberof pod per plant aphid resistance and hence analyzed with RCBD Results of heritability estimatesshowed that all traits have heritability of over 50 except the thousand grain weight The highestheritability belonged to number of seeds per pod 89 9 and the lowest heritability belonged tothousand grain weight 43 Little difference were observed between the coefficients of geneticand phenotypic variation for most traits Simple correlation among characteristics showed that thereare the positive and significant correlations between the lateral branches number of pods per plant seed weight and with seed yield per plant yield and harvest index Analysis results of stepwiseregression showed that number of pods per plant seed yield thousand grain weight number ofseeds per pod explained up to 40 of the variation of seed yield According to path analysisresults the numbers of pods per plant had the highest direct effects on grain yield while thethousand grain weight and number of seeds per pod had insignificant effect Results of factoranalysis identified four factors that explained 64 of the total variation These factors were calledthe efficiency factor the agent phenology the branching agent and the reservoir factor respectively Cluster analysis based on the agronomic traits and morphological classified the lines infour groups the first group of lines with low performance characteristics the second and thirdgroups with moderate performance and the fourth group with the high performance In general results of this study showed that there are a broad genetic diversity among the evaluated lines which can utilize to improve the desired lines Keywords Canola yield components correlation analysis stepwise regression path analysis

شجاعي، مجيد

ارزيابي صفات زراعي در لاين هاي M4 حاصل از القاي موتاسيون و شناسايي لاين هاي موتانت مطلوب در كلزا ﴿.Brassica napus L﴾

اجزاي عملكرد , تجربه همبستگي , رگرسيون گام به گام , تجزيه عليت