Study the yield, yield components and morphological traits in the spring safflower (Carthamus tinctorius L.) using multivariatestatistical approaches

Subject Areas : Agroecology Journal

Ali Reza Ahmadzadeh ¹ , eslam majidi ² , bahram alizadeh ³ , amirhasan omidi ⁴

1 - Ph. D.
Student of the Islamic Azad University of Tehran, Science and Research Branch, Tehran, Iran.
2 - Prof. of Islamic Azad University of Tehran, Science and Research Branch, Tehran, Iran.
3 - Assistant Prof. of Seed and Plant Improvement Institute. KARAJ, Iran.
4 - Scientific Board of Seed and plant Improvement Institute. KARAJ, Iran.

Received: 2007-08-05 Accepted : 2008-05-17 Published : 2010-04-21

Keywords: Grain yield, Safflower, Yield components, Stepwise and path analysis,

Abstract :

In order to study the relationship between seed yield, yield components and some morphological traits, an experiment with 30 different genotypes of spring safflower was conducted at the Research Station of Faculty of Agriculture, Islamic Azad University (Shabestar Branch) during 2005 and 2006. The experimental design was a randomized complete block with three replications, and 13 traits such as plant height, number of seeds per head, weight of main head in each plant, weight of all heads, number of heads per plant, total biomass, flowering time, time of maturity, hectoliter weight, weight of 100 seeds, seed yield and harvest index were measured. A positive significant colleration was found between grain yield with plant height, hectoliter weight, total biomass and number of seeds per head. Stepwise regression and path coefficient analysis of grain yield as a dependent variable and other traits as independent variables revealed that plant height, plant weight, weight of 100 seeds and hectoliter weight had a positive direct effects on the seed yield. The highest effects were determined by the hectoliter weight, plant height and weight of 100 seeds and the lowest by plant biomass.   Therefore, it is suggested to consider the three mentioned above main characters in the breeding programes which are strongly related to the seed yield.

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