01814naa a2200229 a 450000100080000000500110000800800410001910000150006024501100007526000090018530000160019452011420021065000110135265000090136365300370137270000150140970000200142470000160144470000160146070000140147677300940149010413752018-02-26       2008    bl uuuu     u00u1 u    #d1 aCASTRO, A.  aQTL analysis of spot blotch and leaf rust resistance in the BCD47 × Baronesse barley mapping population.  c2008  ap. 311-319.  aAbstract Leaf rust (LR) (caused by Puccinia hordei) and spot blotch (SB) (caused by Cochliobolus sativus) are two of the main diseases of barley in Uruguay. We studied the genetics of the resistance to both diseases present in a doubled-haploid (DH) population derived from the cross BCD47 × Baronesse. BCD47 has low SB severity and high susceptibility to LR, while Baronesse is susceptible to SB and has low susceptibility to LR. Both resistances were expressed at the adult plant stage. The population was phenotyped in 9 environments for each disease. Four QTLs were detected for SB, on chromosomes 1H, 3H, 6H and 7H. In three of them, BCD47 contributed the resistant alleles. The QTLs on chromosome 1H (located in the Bmac213-Bmag770 interval) and chromosome 3H (located in the Bmag225-Bmag013 interval) were the most consistent across environments. Two main QTLs were detected for LR on chromosomes 6H (Baronesse contributing the resistant allele) and 7H (BCD47 contributing the resistant allele), coincident with SB resistance QTLs. The QTL on chromosome 6H (linked to the SSR Bmag173) was the most consistent across environments.  aCEBADA  aROYA  aRESISTENCIA A LA ROYA DE LA HOJA1 aGERMAN, S.1 aGONZÁLEZ, S.N.1 aHAYES, P.M.1 aPEREYRA, S.1 aPEREZ, C.  tInternational Barley Genetics Symposium,10.,Alexandria, Egypt: ICARDA, Proceedings, 2008.