title: Mode of inheritance and genetic diversity of BaMMV resistance of exotic barley germplasms carrying genes different from 'ym4'.
abstract: In order to obtain information about the mode of inheritance of BaMMV resistance in germplasms carrying genes different from the "German" gene 'ym4' f1-tests for resistance as well as F2-segregation analyses of crosses to susceptible German cultivars were carried out by mechanical inoculation in the greenhouse. In the f1 the majority of plants of each combination tested reacted susceptible to BaMMV while in the F2 a good fit to a segregation of 1r:3s or 7r:9s was observed. Therefore, the results of these tests revealed that the BaMMV resistance of all the varieties tested is inherited either by a single or by two recessive genes. By testing intercrosses of these resistant varieties segregation of BaMMV-susceptile plants was observed in the majority of combinations, revealing a high degree of genetic diversity in the barley gene pool.
authors.affiliation: Institute of Agronomy and Plant Breeding I, Justus-Liebig-University, Ludwigstrasse 23, D-6300, Gießen, Germany.
authors.forename: F
authors.initials: F
authors.lastname: Ordon
authors.forename: W
authors.initials: W
authors.lastname: Friedt