Evaluation of distinctness, uniformity and stability of some Upland (Gossypium hirsutum L.) and Sea Island (G. barbadense) Cotton cultivars and genotypes morphological characteristics

In order to 36 cotton cultivars and genotypes qualitative morphological characteristics evaluation, in this research, during 2012 to 2013 years in Tehran provinces Agriculture and Natural Resources Research Center at Varamin and Seed and Plant Certification and Registration Institute(SPCRI) at Karaj22 qualitative morphological characteristics studied. Results indicated that, cultivars and genotypes distinct for 11 qualitative morphological characteristics. Based on color of petal cultivars and genotypes divided into 2 distinct yellow and cream petal color groups. All yellow petal color group cultivars, were Sea Island cottons and all cream petal color group cultivars and genotypes were Upland cottons. Among yellow petal color cultivars,for the reason of same level of position of stigma relative to anthers, medium bract dentations at green maturity and strong leaf lower side density of pubescene, Termez 14 cultivar distinct from 2 other cultivars. Cream petal color cultivars and genotypes also based on leaf shape distinct into 2 palmate and lanceolate groups. Lanceolate group cultivars and genotypes were 3 cultivars, Sepid, Okra Leaf-Red and Super okra which among their boll shape in longitudinal section and seed color of fuzz distinct 3 cultivars from each other. Palmate leaf shape cultivars and genotypes group which amounted to31 of evaluated cultivars and genotypes, based on boll shape in longitudinal section divided to 3 main groups. 20 cultivars and genotypes of this group which were cultivars and genotypes with ovate boll shape in longitudinal section also based on 7 characteristics, boll pitting of surface, bract dentations at green maturity,