Genetic Variation and heritability of several traits in wild Iranian Iris species

Azimi, Mohammad Hossein; Moradi Ashoor, Behrooz; Hosseini Niya, Asghar

doi:10.22092/ijrfpbgr.2011.10072

Genetic Variation and heritability of several traits in wild Iranian Iris species

Document Type : Research Paper

Authors

10.22092/ijrfpbgr.2011.10072

Abstract

Iris is one the major ornamental and pharmaceutical plant species from Iridaceae family. It is also native plant of Iran, which has special economic position in the world. In order to determine genetic variation and heritability on several traits, 18 Iris species were collected from different habitats of Iran. The materials were studied at the National Ornamental Plants Research Station based on a randomized complete block design with three replications. Statistical parameters, including correlation coefficients, broad sense heritability, phenotypic and genotypic coefficient of variation were estimated. Analysis of variance showed significant differences between the species for all of the studied traits (α=0.01), indicating wide variation for the studied traits in the wild species. The highest phenotypic and genotypic coefficient of variation were observed on periant tube length, 70%, inner tepal width, 74%, and plant height, (69 and 67%). I.Germanica (F1) species in the most of the studied traits was superior. The strongest broad sense heritability was related to inner tepal width (98.95), outer tepal width (98.74), outer tepal width of claw (98.67) and inner tepal length (97.78). The most positive and significant correlation coefficients was observed between Inner tepal length and inner tepal width. Whereas, the lowest correlation value was observed between perianth tube length and pistil width.

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