PMID: 8939816Dec 1, 1996Paper

Meiotic behaviour of the minichromosome in the phytopathogenic ascomycete Leptosphaeria maculans

Current Genetics
S LeclairMarie-Hélène Balesdent

Abstract

All Leptosphaeria maculans field isolates displayed a minichromosome (MC) clearly separated from the overall electrokaryotype following pulsed-field gel electrophoresis. MCs exhibited a length polymorphism ranging from 650 to 950 kb. Tetrad analyses revealed the parental inheritance of MC length polymorphism (50% of the tetrads) or else the generation of novel-sized MCs (27%), which suggested that recombination occurred between MCs. Nineteen percent of the tetrads displayed a lack of the MC band in the electrokaryotype for one or two of the four resulting genotypes. Crosses between isolates carrying or lacking MCs revealed non-Mendelian segregation and suggested that some isolates could display at least two copies of the MC. Only repeated sequences hybridising to all chromosomes were isolated from the MC. Finally, saprophytic or parasitic fitness was not modified when isolates apparently lacked the MC. All these data suggested that the L. maculans MC behaves like a 'B' chromosome.

Citations

Nov 3, 2009·Genetica·Tatiana Aparecida VoltolinFabio Porto-Foresti
Oct 24, 2008·Phytopathology·M H BalesdentT Rouxel
Mar 21, 2000·Philosophical Transactions of the Royal Society of London. Series B, Biological Sciences·J P CamachoL W Beukeboom
Nov 13, 2012·PLoS Pathogens·Guillaume DaverdinMarie-Hélène Balesdent
Oct 1, 2014·Nature Reviews. Genetics·David S GuttmanPaul Schulze-Lefert
Apr 5, 2011·Current Opinion in Plant Biology·Sarah Maria Schmidt, Ralph Panstruga
May 1, 2005·Molecular Plant Pathology·T Rouxel, M H Balesdent
Jun 16, 2001·Fungal Genetics and Biology : FG & B·B J HowlettM S Pedras
Jul 16, 2010·Hereditas·Tatiana Aparecida VoltolinFábio Porto-Foresti
Apr 18, 2018·Molecular Plant-microbe Interactions : MPMI·Stefania BertazzoniJames K Hane
May 24, 2003·Current Genetics·I ChumaS Mayama
May 23, 2020·Plants·Peter-Louis Plaumann, Christian Koch
Jan 22, 1998·FEMS Microbiology Letters·C LevisY Brygoo
May 22, 2021·Chromosome Research : an International Journal on the Molecular, Supramolecular and Evolutionary Aspects of Chromosome Biology·Jessica L SoyerIsabelle Fudal

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