000 02510nam a22003617a 4500
001 G95889
003 MX-TxCIM
005 20240301174247.0
008 121211s ||||f| 0 p|p||0|| |
020 _a978-970-648-180-1
040 _aMX-TxCIM
090 _aCIS-6547
100 1 _aBerraies, S.
_uInternational Symposium on Mycosphaerella and Stagonospora Diseases of Cereals, 8; Mexico City (Mexico); 10-14 Sep 2011. Book of Abstracts
245 0 0 _aIdentification of quantitative trait loci for resistance to Septoria tritici leaf blotch in durum wheat
260 _aMexico, DF (Mexico)
_bCIMMYT :
_c2011
300 _ap. 61
500 _aAbstract only
520 _aSeptoria tritici blotch (STB), caused by the ascomycete Mycosphaerella graminicola (anamorph Septoria tritici) is an economically important foliar disease in the major wheat-growing areas of the world. In Tunisia, breeding for resistance is an effective way of controlling STB on durum wheat. In this study, resistance to STB in durum wheat was investigated in a population derived from a cross between the susceptible variety Karim and the newly released variety Salim. One hundred and forty-five single-seed descent derived F6 recombinant inbred lines (RILs) and parental lines were tested for resistance to Septoria under natural infection in field conditions during 2009 and 2010 seasons. Symptoms of STB were assessed by the Double digit 00-99 scoring method at early grain filling stage. A genetic map was constructed using the recombinant population genotyped with a total of 293 DArT markers and 22 SSR markers. Linkage analysis defined 29 linkage groups with a total map length of 795 cM. Most markers were mapped to the B-genome with length of 450 cM against 345 cM to the A-genome. A QTL for resistance to STB was identified and located on chromosome 3B. This QTL showed significant effect in 2009 and 2010 seasons with R2 value of 23,47%. DArT markers linked to the QTL influencing resistance to STB have potential use in durum wheat breeding programs.
536 _aGlobal Wheat Program
546 _aEnglish
593 _aLucia Segura
594 _aINT2585
595 _aCSC
700 1 _aBelzile, F.,
_ecoaut.
700 1 _aDuveiller, E.|Singh, P.K.
_eeds.
700 1 _aGharbi, M.S.
_992
700 1 _aHajlaoui, M.R.,
_ecoaut.
700 1 _aMartine, J.,
_ecoaut.
700 1 _aPozniac, C.J.,
_ecoaut.
700 1 _aTrifi, N.,
_ecoaut.
700 1 _9844
_aAmmar, K.
_gGlobal Wheat Program
_8INT2585
942 _cPRO
999 _c8274
_d8274