000 02247nam a22003257a 4500
001 G97594
003 MX-TxCIM
005 20170719110351.0
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020 _a978-0-615-70429-6
040 _aMX-TxCIM
090 _aCIS-6979
100 1 _aBoukef, S.
_uProceedings Borlaug Global Rust Initiative Technical Workshop; Poster Abstracts. Theme 6: Understanding Plant Pathogens; Beijing (China); 1-4 Sep. 2012
245 0 0 _aGenetic differentiation at mitochondrial locus among Zymoseptoria tritici populations infecting bread wheat and durum wheat
260 _c2012
300 _ap. 244
500 _aAbstract only
520 _aZymoseptoria tritici (synonym Septoria tritici) is considered the most important foliar disease of both durum (Triticum durum) and bread wheat (Triticum aestivum) collected from Tunisian and European fields. The objective of this work was to investigate the host species pattern of adaptation of the fungus, on populations isolated from bread and durum wheat fields using 11 highly polymorphic nuclear microsatellites and one mitochondrial DNA (mtRFLP4) nucleotide sequence. Populations? subdivision was based on both wheat species and the presence/absence of the specific mtRFLP4 sequence. Gene flow estimates showed high migration levels between all populations suggesting low differentiation with an exception of less than one migrant per generation (Nm<1) observed between populations from bread wheat not carrying the specific mtRFLP4 sequence and all the others populations. Genetic differentiation was subsequently assessed using pairwise FST and Jost?s D estimates. The analyses indicate significant difference between bread wheat adapted population not carrying mtRFLP4 sequence and all others Z. tritici populations. Results suggest that wheat species specificity in Z. tritici might be altered by the specific mitochondrial mtRFLP4 locus.
536 _aGlobal Wheat Program
546 _aEnglish
593 _aLucia Segura
594 _aINT3301
595 _aCSC
700 1 _aBrunner, P. C.,
_ecoaut.
700 1 _aMcDonald, B. A.,
_ecoaut.
700 1 _aMcIntosh, R.
700 1 _aRezgui, S.,
_ecoaut.
700 1 _aYahyaoui, A.,
_ecoaut.
942 _cPRO
999 _c8524
_d8524