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Record number 38427
Title Characterisation and inheritance of resistance to beet necrotic yellow vein virus in Beta
Author(s) Scholten, O.E.
Source Agricultural University. Promotor(en): R.W. Goldbach; W. Lange; D. Peters. - S.l. : Scholten - ISBN 9789054856863 - 108
Department(s) Centrum voor Plantenveredelings- en Reproduktieonderzoek
Laboratory of Virology
Publication type Dissertation, internally prepared
Publication year 1997
Keyword(s) plantenveredeling - ziekteresistentie - plaagresistentie - beta vulgaris - suikerbieten - plantenziekten - plantenvirussen - tobamovirus - plantenziekteverwekkende schimmels - plant breeding - disease resistance - pest resistance - sugarbeet - plant diseases - plant viruses - plant pathogenic fungi
Categories Resistance Breeding / Plant Viruses
Abstract <p>Beet necrotic yellow vein virus (BNYVV) is the causal agent of rhizomania in sugar beet. The virus is transmitted by the soil-borne fungus <em>Polymyxa betae.</em> Both the multiplication and distribution of BNYVV in rootlets of the sugar beet selection <em>Beta vulgaris</em> subsp. <em>vulgaris</em> Holly-1-4 differed from those in the wild beet accession <em>B. vulgaris</em> subsp. <em>maritima</em> WB42, which possibly is the result of differences in the mechanism of resistance. Also, inheritance studies using progenies of crosses between Holly or WB42 and susceptible plants demonstrated that resistance in WB42 was more effective against BNYVV than resistance in Holly-1-4 and that this difference had a genetic base. Studies on allelism between Holly-1-4 and WB42 indicated the presence of closely linked loci in these accessions. The name <em>Rz2 is</em> proposed to refer to the resistance gene in WB42. Consequently the gene <em>Rz</em> in Holly should be referred to as <em>Rz1.</em> Molecular marker studies also indicated the presence of identical or closely linked loci in Holly-11-4 and two other accessions R104 and R128, with resistance derived from subsp. <em>maritima</em> and subsp. <em>vulgaris</em> , respectively.
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