ارزيابي تنوع ژنوتيپ هاي سياه تاغ بر اساس صفات مورفولوژيكي (Haloxylon aphyllum)

The Investigation of variation of genotypes of Haloxylon aphylom on based morphological characteristics

In order to investigate genetic potential and genetic variation in various Haloxylon populations, an experiment was conducted on genotypes collected from different areas of the country in 2007 at an experimental station located nearby Ghom called Hossein Abad. The experiment was based on randomized complete block design with three replications. Several morphological characteristics were evaluated on 15 progenies of each 27 genotypes of Haloxylon aphyllum. Analysis of variance were performed on the recorded characteristics that indicated the a great deal of genetic variation and differences between the characteristics studied during the 7year of experiment. Therefore, in breeding and selection programmers interrelationship between the characters must be used to achieve the breeding objectives. Most of the studied characters such as plant height, trunk diameter, crown diameters at two different directions, showed positive significant correlation of investigation. Plant height showed a positive significant correlation to trunk diameter and crown diameters for the 7th year of study. Based on the 7th results, the genotype number 18 originated from Sistan and Baluchestan is determined as the best genotypes. It is recommended to use this genotype during next phase of the study to estimate required genetic parameter in next generations.