List of Articles Seed and oil yield

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  1 - Relationships between Oil and Grain Yield with Morphologic Traits in Single Cross Hybrids of Sunflower (Helianthus annuus L.)
  A.R. Tarinejad P. Ramezani V. Rashidi M. Ghafari
  Grain and oil yield in sunflower (Helianthus annuus L.) are quantitative traits, which are products of interactions between numbers of traits. Thus, evaluation of different traits and their relationships are important to the researcher. In this study, important agronomi More

  Grain and oil yield in sunflower (Helianthus annuus L.) are quantitative traits, which are products of interactions between numbers of traits. Thus, evaluation of different traits and their relationships are important to the researcher. In this study, important agronomic traits and their relationships in sixteen single cross hybrids in a randomized complete block design experiment with three replications were investigated during 2009 at the Research Station of Islamic Azad University, Tabriz Branch. Result indicated that all of the morphological traits except ratio of kernel/achen, area of the flag leaf and hull weight per head were significant at 5% probability levels. Mean comparisons showed that hybrids including 8(CMS322×R2) and 13(CMS346×R56) possessed promising traits such as seed and oil yield, 100-seed weight, head diameter, stem diameter, total number of seeds per head, ratio of kernel/achen, day to flowering, the number and area of leaf to include in breeding programs. The result also showed that correlations between grain yield and with other traits such as growing period length¸ day to physiological maturity and stem diameter¸ head diameter¸ number of seeds per head and number of filled seeds per were head positive and significant at 5% probability levels.  Manuscript profile
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  2 - Effect of drought stress and defoliation on some of agronomical traits, yield and yield components of oil sunflower
  Navvab Hajihasani mohsen roshdi mahdi ghafari esmaeil alizadeh amin moradiaghdam
  In order to evaluation of effects of drought stress and defoliation stages and strata on yield and its components of Alstar hybrid of sunflower, an experiment was conducted during 2006 - 2007 at agricultural and natural resources research station of Khoy. Irrigation aft More

  In order to evaluation of effects of drought stress and defoliation stages and strata on yield and its components of Alstar hybrid of sunflower, an experiment was conducted during 2006 - 2007 at agricultural and natural resources research station of Khoy. Irrigation after 80, 120 and 160 mm evaporation from class A pan, as  main factor, defoliation stage in two levels (R2 and R6 stages) as sub factor and defoliation location in three levels (control, middle up leaves defoliation and middle down leaves defoliation) as a sub sub factor were evaluated in strip split plot design in the basis of randomized complete block design in four replications. The results showed that drought stress decreased plant height, head diameter, harvest index, 1000 seeds weight, full seeds number, seed yield and oil yield (except seed kernel percent), but increased huld seed percent. Seed yield was 5522 kg in irrigation after 80 mm evaporation treatment, but decreased in two other levels of irrigation up to 437 and 1297 kg, respectively. Defoliation stage had significant effect on the studied traits and thousand seeds weight, seed yield and oil yield (except seed kernel percent) were higher in R6 stage. Comparison of the effect of defoliation in R6 and R2 stages on seed yield showed that leaves are important especially in primary reproductive growth stage. Defoliation in different parts of stem caused significant differences in plant height, head diameter, huld seed percent, harvest index, seed kernel percent, 1000 seeds weight, full seed number, seed yield and oil yield and middle up leaves defoliation decreased most characters, significantly. Between interactions, middle down leaves defoliation in R6 stage didn’t have significant difference with control treatment. The results showed high value of sunflower upper leaves protection until beginning of seed filling stage. Manuscript profile