varieties creation and conservation of plant genetic resources

INRA 2010
22
Activity Report
PLANTS PROTECTION
(Ascochyta fabae. fsp lentils Gossen,
Sheard, C.J. Beach & Morrall), were
observed in some lentils fields without
real impact.
DEVELOPMENT OF PEST
MANAGEMENT STRATEGIES
FOR WHEAT
Resistance of wheat cultivars and
breeding lines to Septoria
In controlled conditions of a nursery,
Evaluation of 89 wheat lines to Septoria
revealed a large genetic diversity in the
responses of these lines. 8 lines with
total immunity were identified and could
be used as resistance sources against
several races of this pathogen.
Research on multiple disease
resistance in wheat
Evaluation of resistance of two local
germplasm collections to brown and
yellow rust showed that bread wheat is
far more sensitive than durum wheat.
Among this material, 4 varieties were
completely immune to yellow rust and
20 to brown rust.
Moreover, evaluation of CIMMYT
wheat nursery to prevalent diseases
revealed a resistant line to Septoria
and yellow rust. This line will be put
forward for registration in the official
catalogue and/or its introduction in
crossing blocks.
Selection for root rot resistance
Evaluation in root rots controlled
conditions of a bread wheat collection
has highlighted a genetic variability
among lines and allowed to select 27
tolerant lines.
Selection of doubled haploid resistant
lines
Within the framework of the project
“generation Challenge program”, the
application of screening by 3 primers
to find resistance characters to yellow
rust, proteins with high molecular
weight and the presence of chromosome
1R of rye on 500 haploid lines allowed
the selection of 67 double haploid lines
combining these three characteristics.
With a view of their future performance
in real conditions, these lines will be
considered as developed germplasm or
varieties to propose for registration.
Performance of chemical products for
the control of wheat leaf diseases in
the semi-arid zones
With regard to the fungicide treatment,
a study was conducted on the
performance of products composed
by: Fluquinconazole, Flutriafol
+ Carbendazim, Epoxiconazole,
Fluzilazole + Carbendazim,
Propiconazole for control of leaf diseases
of wheat in semi-arid zones . In this
framework, yield losses were estimated
at 21% for durum wheat Karim and 23%
for bread wheat Achtar. The products