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Paper Information

Journal:   IRANIAN JOURNAL OF FIELD CROPS RESEARCH   2004 , Volume 1 , Number 2; Page(s) 127 To 138.
 
Paper: 

RELATIONSHIPS AMONG AGRONOMIC TRAITS OF SOME SAFFLOWER GENOTYPES IN MOISTURE-STRESSED AND NON-STRESS CONDITIONS

 
 
Author(s):  ABOLHASANI KH., SAEIDI G.
 
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Abstract: 

In order to have a successful breeding program, it is important to determine the genetic relationship among the traits. This study was conducted to investigate the relationship among agronomic traits in safflower at two moisture stress and non-stress conditions. In this study, 15 safflower genotypes were evaluated at two different moisture regimes, based upon depletion of 50% and 85% of soil moisture content. In each moisture regimes, a randomized complete block design with three replications was used. The phenotypic and genetic correlation coefficients revealed that in both irrigation regimes, number of seeds per head, plant height and days to maturity had a high positive correlation with both seed yield per plant and seed yield per plot, while the number of heads per plant was significantly and negatively correlated with seed yield per plant and seed yield per plot. The results of stepwise regression for seed yield per plant as a dependent variable indicated that in non-stress conditions, number of seeds per head, 100-seed weight, plant height and number of heads per plant were entered in the model, respectively and they contributed in 93% of the variation for seed yield per plant. In the stress conditions, the same traits, except the plant height entered in the model with the same sequence and they contributed in 94% of the variation for seed yield per plant. The results of path analysis for genetic correlation coefficients between each of seed yield per plant and seed yield per plot with their corresponding traits in the regression model showed that in both moisture regimes, the number of seeds per head had the highest direct and positive effect on seed yield per plant and seed yield per plot, but this direct effect reduced by its negative indirect effects via number of heads per plant and then 100-seed weight. The number of heads per plant in both stress and non-stress conditions had a positive direct effect on the seed yield per plant and seed yield per plot. However because it had a considerable negative indirect effect via number of seeds per head, it had a negative correlation coefficient with each of seed yield per plant and seed yield per plot. In general, the results of this study showed that in both moisture stress and non-stress conditions, the number of seeds per head can be considered as a good selection criterion to improve seed yield in breeding programs of safflower. Also, it seems that in non moisture-stress conditions, the tall and late-mature genotypes can produce more seed yield.

 
Keyword(s): SAFFLOWER, PHENOTYPIC AND GENETIC CORRELATION, PATH ANALYSIS
 
 
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APA: Copy

ABOLHASANI, K., & SAEIDI, G. (2004). RELATIONSHIPS AMONG AGRONOMIC TRAITS OF SOME SAFFLOWER GENOTYPES IN MOISTURE-STRESSED AND NON-STRESS CONDITIONS. IRANIAN JOURNAL OF FIELD CROPS RESEARCH, 1(2), 127-138. https://www.sid.ir/en/journal/ViewPaper.aspx?id=274250



Vancouver: Copy

ABOLHASANI KH., SAEIDI G.. RELATIONSHIPS AMONG AGRONOMIC TRAITS OF SOME SAFFLOWER GENOTYPES IN MOISTURE-STRESSED AND NON-STRESS CONDITIONS. IRANIAN JOURNAL OF FIELD CROPS RESEARCH. 2004 [cited 2021June24];1(2):127-138. Available from: https://www.sid.ir/en/journal/ViewPaper.aspx?id=274250



IEEE: Copy

ABOLHASANI, K., SAEIDI, G., 2004. RELATIONSHIPS AMONG AGRONOMIC TRAITS OF SOME SAFFLOWER GENOTYPES IN MOISTURE-STRESSED AND NON-STRESS CONDITIONS. IRANIAN JOURNAL OF FIELD CROPS RESEARCH, [online] 1(2), pp.127-138. Available: https://www.sid.ir/en/journal/ViewPaper.aspx?id=274250.



 
 
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