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Titolo:
A MEIOTICALLY REPRODUCIBLE CHROMOSOME LENGTH POLYMORPHISM IN THE ASCOMYCETE FUNGUS OPHIOSTOMA-ULMI (SENSU-LATO)
Autore:
DEWAR K; BOUSQUET J; DUFOUR J; BERNIER L;
Indirizzi:
MIT,WHITEHEAD INST BIOMED RES,CTR GENOME RES CAMBRIDGE MA 02139 UNIV LAVAL,FAC FORESTERIE & GEOMAT,CTR RECH BIOL FORESTIERE ST FOY PQG1K 7P4 CANADA
Titolo Testata:
MGG. Molecular & general genetics
fascicolo: 1, volume: 255, anno: 1997,
pagine: 38 - 44
SICI:
0026-8925(1997)255:1<38:AMRCLP>2.0.ZU;2-S
Fonte:
ISI
Lingua:
ENG
Soggetto:
DUTCH ELM DISEASE; RICE BLAST FUNGUS; ELECTROPHORETIC KARYOTYPES; SACCHAROMYCES-CEREVISIAE; MAGNAPORTHE-GRISEA; COPRINUS-CINEREUS; CANDIDA-ALBICANS; USTILAGO-HORDEI; SP-NOV; PATHOGEN;
Keywords:
ELECTROPHORETIC KARYOTYPES; CHROMOSOME LENGTH POLYMORPHISMS; GENOME REARRANGEMENTS; OPHIOSTOMA ULMI (SENSU LATO);
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Science Citation Index Expanded
Citazioni:
33
Recensione:
Indirizzi per estratti:
Citazione:
K. Dewar et al., "A MEIOTICALLY REPRODUCIBLE CHROMOSOME LENGTH POLYMORPHISM IN THE ASCOMYCETE FUNGUS OPHIOSTOMA-ULMI (SENSU-LATO)", MGG. Molecular & general genetics, 255(1), 1997, pp. 38-44

Abstract

We have followed the transmission of Ophiostoma ulmi s.l. chromosome length polymorphisms (CLPs) into the F-2 generation to determine the reproducibility of a genome rearrangement culminating in the conversionof a 1.0 Mb chromosome into a 800 kb chromosome. The 1.0 Mb chromosome in strain CESS16K is thus far unique among O. ulmi s.l. wild-type strains, as no other wild-type strains have been observed with chromosomes smaller than 2.3 Mb. It has been previously shown that the 1.0 Mb chromosome is mitotically stable, carries at least one normally expressed gene, and is transmitted through meiosis. In this study, a series of crosses were performed to further elucidate the pattern of inheritance of the 1.0 Mb chromosome and the process of conversion of the 1.0 Mb species to 800 kb. In crosses where the 1.0 Mb chromosome was allowed to pair with itself or with the 800 kb chromosome, all progeny inherited a copy of the 1.0 Mb or 800 kb form, further demonstrating the A-type nature of these small chromosomes. When a cross was repeated between the strains CESS16K (1.0 Mb chromosome) and FG245B(r)-O (no 1.0 Mbor 800 kb chromosome)? the occurrence of a 800 kb chromosome was observed in 9% of the progeny. A reciprocal cross between an 800 kb strainand a strain with no 800 kb or 1.0 Mb chromosome was conducted, and aprogeny strain containing a 1.0 Mb chromosome was recovered. The reproducibility and reciprocality of the 1.0 Mb to 800 kb chromosome conversion demonstrates that meiotic processes are responsible for this CLP, and that O. ulmi s.l. strains with various divergent genome architectures can remain sexually compatible.

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Documento generato il 27/11/20 alle ore 07:04:22