Interspecies relationship of the C genome cotton and their phylogenetic relations with D genome species

Germplasm and Genetic Stocks

poster

Ерназарова, Ziraatkhan

Despite intensive enough research of species of genus Gossypim L. still there are disputable questions of their systematization and phylogeny, a number of representatives are insufficiently known and especially Australian cotton group (subgenus Sturtia Tod.). Methods of obtainment of different fructifying hybrids on the basis of their genetic interrelations and degree of phylogenetic relationship are not developed. Investigations showed that for the first time it was cleared out the phylogenetic relationship between Australian (C genome) cotton species and degree of genetic relationship with the American (D genome) cotton by using the methods of comparative morphology, hybridizations and cytogenetics. It was made ware accurate systematically condition of some representatives of species G.sturtianum, confirmed independence of species G.sturtianum var. nandewarense selected to the species rank as G.nandewarense. On the ground of distinctions it was offered to bring out species G.bickii into separate subsection. In the result of studying of inherit of morphological traits of some intragenomic cotton hybrids F2 revealed direct correlational dependence of traits as color nectary of leaf blades with the polytocous. Worked out the schemes of phylogenetic relationship of the Australian cotton species with the representatives of the American cotton species. Worked out schemes make easy selection of initial material and provide effectiveness for obtaining new hybrids forms with setted traits. Obtained hybrids forms with the useful economic traits vitally full filled cotton genepool and also it is valuable initial material for further investigations of genus Gossypium L species in the field of systematics genetics, cytology and practical breeding.