Paper Details

Karyological studies in the genus Lolium in Iran

Mirjalili Seyed Abbas

DOI: https://dx.doi.org/10.12692/ijb/4.4.176-183

Int. J. Biosci. 4(4), 176-183. February, 2014. (PDF)

Abstract:

The genus Lolium is one of the most important categories of temperate forage grasses that is diploid (2n=2x=14), although some populations have been reported as tetraploid (2n=4x=28). Seeds were collected or provided from Genebanks. Karyotipic parameters like the length of long and short arm (arm length ratio), Total form percentage, and relative length of shortest chromosome (centromere index) were measured. Levels of ploidy and chromosome numbers were studied for 20 populations. Of these, 16 were diploid and 4 were tetraploid. Karyological data were recorded on at least five well-prepared cells and analyzed by SAS software. Analysis of variance showed that populations have significant differences in long arm, short arm and total length of chromosomes. Interspecific relationships between populations based on the karyological traits were discussed. Also, it was shown that L. persicum had the most symmetric chromosomes and L. temulentum and L. rigidum chromosomes were asymmetric.