Genetske analize roditelja u selekciji pšenice prema obligatnim parazitima

Abstract

Osnovni preduslov za uspešnu selekciju na otpornost prema obligatnim parazitima je različitost roditelja po genima koji tu osobinu kontrolišu. Broj gena i njihove interakcije, bez obzira na vrstu otpomosti, od presudnog su značaja za trajnost ispoljavanja osobine. S ciljern stvaranja linija različitih po osnovi otpomosti prema Puccinia recondita tritici i Erysiphe graminis-tritici odabrane su dve linije kompletno otpome prema prouzrokovaču lisne rđe i pepelnice u stadijumu sejanaca (kontrolisani uslovi) i polju. Kao drugi roditelj u kombinacijama poslužila je sorta s određenim stepenom nekompletne otpomosti prema oba parazita, Valjevka.

Base for the successful breeding for the resistance to obligate parasites of wheat is difference between parents according to genes controling the characters. Number of genes and their interactions related to any type of the resistance are most important for the durability of the mentioned characters. In order to create new lines with different base of Puccinia recondita and Erysiphe graminis resistance, two completely resistant lines in the seedling stage (controlled conditions) and in the field conditions were chosen. The second parent was Valjevka, variety with determinated level of uncomplete resistance to both parasites.