Catalogo Articoli (Spogli Riviste)

OPAC HELP

Titolo:
GENETIC-VARIATION IN NATURAL-POPULATIONS OF THE CEREAL CYST-NEMATODE (HETERODERA-AVENAE WOLL) SUBMITTED TO RESISTANT AND SUSCEPTIBLE CULTIVARS OF CEREALS
Autore:
LASSERRE F; GIGAULT F; GAUTHIER JP; HENRY JP; SANDMEIER M; RIVOAL R;
Indirizzi:
INRA,ZOOL LAB,BP 29 F-35650 LE RHEU FRANCE INRA,ZOOL LAB F-35650 LE RHEU FRANCE INRA,SERV RECH INTEGREES PROD VEGETALES F-35650 LE RHEU FRANCE UNIV PARIS 11,LAB EVOLUT & SYSTEMAT VEGETALES,CNRS,URA 1492 F-91405 ORSAY FRANCE
Titolo Testata:
Theoretical and Applied Genetics
fascicolo: 1-2, volume: 93, anno: 1996,
pagine: 1 - 8
SICI:
0040-5752(1996)93:1-2<1:GINOTC>2.0.ZU;2-2
Fonte:
ISI
Lingua:
ENG
Soggetto:
SOLANUM-VERNEI HYBRIDS; GLOBODERA-PALLIDA; DNA; POLYMORPHISM; SELECTION; PATTERNS;
Keywords:
OAT; HETERODERA AVENAE; RESISTANCE-BREAKING PATHOTYPE; ENZYMATIC POLYMORPHISM; POPULATION GENETICS;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Science Citation Index Expanded
Citazioni:
29
Recensione:
Indirizzi per estratti:
Citazione:
F. Lasserre et al., "GENETIC-VARIATION IN NATURAL-POPULATIONS OF THE CEREAL CYST-NEMATODE (HETERODERA-AVENAE WOLL) SUBMITTED TO RESISTANT AND SUSCEPTIBLE CULTIVARS OF CEREALS", Theoretical and Applied Genetics, 93(1-2), 1996, pp. 1-8

Abstract

The purpose of the present work was to study the genetic characteristics of cereal cyst nematode (Heterodera avenae) populations re-established after the long-term use of resistant oat cultivars in field conditions, Population features were analyzed through fitness components and variation in enzymatic polymorphism (esterase and malate dehydrogenase loci). The longest (6 year) use of the same resistance genes (oat cv Panema) at high frequency (Rotation IB) led to the selection of a resistance-breaking pathotype and to a decrease in viability which suggested either a founder effect or a lower reproductive potential for thenew pathotype, Analysis of esterase allelic frequencies led to the conclusions that: (1) the genetic constitution of this pathotype was different from the reference population maintained on the susceptible host (oat cv Peniarth), and (2) that the esterase locus may develop a disequilibrium linkage with loci involved in virulence(1). Random mating was recorded at the whole-field level but not always at the single-plant level, suggesting that cultivation practices such as annual ploughing could play a major role in homogenizing subpopulations developed inthe vicinity of a plant. These phenomena showed that the long-term use of highly effective resistance could provok marked genetic modifications in populations, These risks should be taken into account when deciding strategies for optimal use of resistance genes in nematode management programs.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 26/11/20 alle ore 14:28:36