3881

3664

كارشناسي ارشد

املاح نباتات

اصفهان :دانشگاه صنعتي اصفهان ،دانشكده كشاورزي

1386

ده، 75،[II] ص: جدول

ص، ع به: فارسي و انگليسي

قدرت الله سعيدي

عبدالمجيد رضايي

8/2/87

محمد مهدي مجيدي، مهدي كديور

مهندسي كشاورزي

ID3664

به فارسي و انگليسي: قابل روئيت در نسخه ديجيتال

Abstract The objectives of this study were to investigate the genetic variability for theagronomic traits in landraces of sesame and select single plants for isolating thebreeding lines This study was conducted at the research farm of Isfahan University ofTechnology in 2006 A randomized complete block design with four replications wasused to evaluate seven landraces of sesame from the regions of Ardestan Ahvas Birjand Shiraz Golpayegan Markazi and Mobarake to assess inter and intra population variation for agronomic traits The studied characters were days toflowering days to maturity plant height percentage of lodging plants branches plant capsules plant seeds capsule 200 seed weight seed yield plant seed yield plot seedoil content and oil yield plot The results showed significant differences among thelandraces for all of the studied traits The phenotypic coefficients of variation weregreater than the genetic ones for all the traits but their differences were so small in mostof the traits The highest phenotypic and genetic coefficients of variation were obtainedfor branches plant and the lowest for 200 seed weight The variation among singleplants within the populations was also high for the studied traits The highest intra population variation was observed for branches plant and the lowest was found for plantheight Capsules plant and seeds capsule had high and positive correlation with seedyield plant Capsules plant and seed yield plant also highly correlated with seed yield plot Oil yield had high and significant correlation with each of seed yield and seed oilcontent Stepwise regression showed that capsules plant seeds capsule and 200 seedweight were important components of seed yield plant and explained 92 of itsvariation Capsules plant 200 seed weight and seeds capsule were also in order moreimportant components of seed yield plot The stepwise regression also showed that inlandraces of Ardestan Golpayegan Markazi and Shiraz capsules plant was the mostimportant component of seed yield plant however in Mobarakeh and Ahvaz landraces 200 seed weight and seeds capsule were the most important components of seedyield plant respectively Results of path analysis indicated that 200 seed weight had thegreatest direct and positive genetic effects on seed yield plant and seed yield Ingeneral the results of this study showed that there was high genetic variation betweenand within landraces of sesame for all of the traits and selection can be effective toimprove the traits In order to improve seed yield of sesame in breeding programs capsules plant seeds capsule and seed weight can be considered in order of importanceas the selection criteria

قدرت الله سعيدي

عبدالمجيد رضايي

محمد مهدي مجيدي، مهدي كديور