varieties creation and conservation of plant genetic resources

Photo 3 : Regeneration of Mejhoul plants
Photo 4 : Young plants from inflorescence
came in production at 4 years of age
Citrus
The introduction of new rootstocks
renowned for being resistant to the
tristeza have been tested in local
pedoclimatic conditions. Among the
selected ones, Flhorag was tested for
these effects on the productivity of
Valencia late, Clementine Sidi Aissa and
the orange Salustiana. The behavior of
this rootstock on these varieties has been
compared to other rootstocks on the
same varieties.
The best results in terms of production
for Flhorag are given with the Valencia
Late. The average fruits weight (265 g)
and the juice percentage (43.4%) are
higher than those given by the other
rootstocks. The Brix degree is less than
that of the Troyer citrange and citrange
carrizo rootstocks but similar to that of
Poncirus trifoliata (Photo 5).
The variant groups of Salustiana,
Sanguinilli and Grosse sanguine have
been tested for their behavior in the
region of Souss. Three promising clones
with good quality and ability in the
conservation have been selected. These
clones will be proposed for the official
catalog inscription (Photo 6).
GENE BANK:
CONSERVATION
OF PHYTOGENETIC
RESOURCES
43.128 accessions of 256 species are
conserved in the INRA gene bank. Five
genuses (Triticum, Hordeum, Medicago,
Avena, and Helianthus) represent more
than 72% of the total accessions.
The exploration organized this year
allowed to collect 20 species of trees
and shrubs and 9 other pastoral species.
In addition, 204 accessions have been
multiplied and characterized (Figure 4).
17 INRA 2010
Varieties Creation