Paper Information

Journal:   JOURNAL OF AGRICULTURAL SCIENCES AND NATURAL RESOURCES   OCTOBER-NOVEMBER 2007 , Volume 14 , Number 4; Page(s) 88 To 99.
 
Paper: 

GENETIC INVESTIGATION OF GRAIN YIELD AND ITS COMPONENTS IN WHEAT USING DIALLEL METHOD

 
 
Author(s):  TOURCHI MAHMOUD*, SHAKIBA MOHAMMAD REZA, SABA J.
 
* DEPT. OF AGRONOMY AND PLANT BREEDING, TABRIZ UNIVERSITY, IRAN
 
Abstract: 

Estimation of additive and dominance genetic variances is important in breeding for self-pollinated crops. Therefore, an experiment was conducted with six pure lines of winter wheat using diallel mating design. Grain yield, biomass, plant height, number of spiklet per plant, number of kernel per spiklet, date of maturity, number of tiller per unit area were measured, in which, significant differences was found among parents only for grain yield, biomass, plant height and date of maturity. The results were also showed a significant difference among crosses. Additive as well as non-additive effects were important in controlling the above mentioned characteristics. High contribution of additive effects in governing biomass and plant height, and dominant effects in controlling of yield per plant were observed. The highest heritability was belonging to plant height. The parents C-75-1 and C-75-4 were shown the highest general combining ability for yield components. Hence they have a good genetic potential to produce a high yielding progeny. Dominant and recessive allele frequencies were not in equilibrium with respect to traits studied. Frequencies of dominant alleles were more than recessives for most of the traits studied. The results showed that increasing grain yield, dry weight and plant height were mostly controlled by dominant alleles.

 
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