QTLs for Orobanche spp. resistance in faba bean: identification and validation across different environments
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2013-12-01
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ISI Journal
Impact factor: 2.465 (Year: 2013)
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Mohamed Kharrat, Moez Amri, Ana M. Torres, Carmen M. Avila. (1/12/2013). QTLs for Orobanche spp. resistance in faba bean: identification and validation across different environments. Molecular Breeding, 32 (4), pp. 909-922.
Abstract
Broomrapes are holoparasitic plants which infect faba bean (Vicia faba L.), among
other legumes. Here, we aimed to identify and validate quantitative trait loci (QTLs)
for broomrape resistance in the cross 29H × Vf136 and to investigate the existence of
common and specific genomic regions against Orobanche crenata and O. foetida. A
genetic map including 171 markers was constructed for QTL analyses. Field trials for
O. crenata were conducted during three consecutive seasons at Córdoba (Spain) and
in a single season at Kafr El-Sheikh (Egypt). QTL analysis for O. foetida was
performed using data from a single season at Beja (Tunisia). Seven QTLs for O.
crenata were identified. Oc7 on chromosome VI was detected over 3 years at Córdoba,
explaining between 22 and 33 % of the phenotypic variation, which make it the most
promising candidate for future marker-assisted breeding for broomrape resistance in
faba bean. O. crenata QTLs identified at Kafr El-Sheikh did not co-localize with those
identified in Córdoba. Environmental differences together with the diversity of
parasitic populations between locations may account for the discrepancy. Three QTLs
for O. foetida were detected. Co-localization of Oc8 and Of3 in chromosome V
confirms a common resistance against both O. crenata and O. foetida, as previously
reported.
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Amri, Moez https://orcid.org/0000-0002-4707-0618