Study of genetic diversity of bread wheat genotypes in view point of remotion of assimilates to seed in two normal and drought stress conditions

Subject Areas : Agroecology Journal

Majid Tousi Mojarrad ¹ , Mohammad Reza Ghannadha ² , Mohammad Salehi ³

1 - M.Sc. Islamic Azad University, Karaj Branch
2 - Scientific Board of Faculity of Agronomy, Tehran University
3 - M.Sc. Islamic Azad University, Karaj Branch

Received: 2007-04-26 Accepted : 2007-07-20 Published : 2007-08-23

Keywords: Bread Wheat, Assimilate, Genetice diversity, Normal and drought stress condition,

Abstract :

Genetice diversity of bread wheat genotypes in view point of assimilate remotion  potential to seed in two normal and drought stress conditions, was evaluated in 2003. two experiment were conducted as RCBD design with four replications and eight genotypes. In one experiment, irrigation was done all growing season based on climate condition and plant need of plant. While, in other experiment irrigation was don only in spiklet stage and filling seed stage suffered drought stree condition. Result showed that there were no significant difference in dry matter transmission from peduncle and second medeian node in all genotypes in two normal and stress conditions. While all genotypes showed significant difference in dry matter transmission from other parts of plant. In normal condition, there was no significant difference in remotion of dry matter from peduncle and second medeian node, but in other parts of plant there was significant difference at 5% confidence level. otherwise in drought stree condition, there was significant difference in remotion of dry matter from peduncle and second medeian node in 5% confidence level. And in other parts of plant, there was no significant difference. Remotion dependent characteristics did not correlate with seed yield. Thus, though this process act as a support source of seed weight, due to their low  contribution to seed weight, it dose not seem that Nariety selection based on mentioned characteristics result in high yield genotypes in semidwarf wheat genotypes

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