كليدواژه :
درژني , ريزومانيا , قدرت زنده ماني , Gene dosage , Rhizomania , Sugar beet , Viability , چغندرقند
چكيده لاتين :
In order to study gene dosage effect and comparison of resistance level to rhizomania, two resistance sources B. vulgaris subsp. maritima, WB42, and B. vulgaris subsp. vulgaris, Holly, were crossed with susceptible parents and Fl, F2 and BC1 populations were obtained. WB42 was also hand-crossed in pairs with Holly and F2 population was obtained. Individual plants of parents. F1, F2 and BCʹ populations were assessed by DAS-ELISA in greenhouse and relation of gene dosage effect with the ratio of 13NYVV-free:BNYVV-infected plants was investigated. Also, number of viable plants in parents and Fl families were counted to compare the level of resistance. In segregating populations, a significant, relationship between the gene dosage effect and the ratio of BNYVV-free : BNYVV-infected plants was not observed. But, observed ratio of BNYVV-free plants in F2 population of Holly * WB42 was in agreement with the expected ratio of plants containing two genes. This result was probably related to the increase of resistance level by combining two different genes. Moreover, statistical comparisons of resistance sources showed that the viability in F1 families of WB42 was higher than Holly, although the difference between parents was not significant.
