Marker Assisted Introgression of Phytophthora capsici Resistance Genes into Locally Adapted Pepper Variety cv. Scotch Bonnet
Abstract
186 words
Phytophthora capsici, a soil born fungus, is one of the most
important constraint to hot pepper production in Uganda, causing
root rot and wilt disease. Current management approaches that
are mainly cultural and chemical do not provide adequate
protection against the disease. Consequently, a lot of the crop
is lost. This study is broadly aiming at developing resistance
against the disease. Specific objectives of the study are: (i) to
test the effectiveness of molecular markers in aiding the
introgression of the Phyto 5.2 QTL into susceptible varieties,
and (ii) to determine the contribution of the Phyto 5.2 QTL
towards resistance to P. capsici in pepper. A resistant line was
crossed with a susceptible variety. F1s were screened using a
SCAR and SSR markers reported to be linked to Phyto 5.2, a
major QTL for resistance to the disease. A total of seven SSR
markers were tested in addition to the SCAR. The SCAR
marker was unfortunately not polymorphic, while only one SSR
marker is promising. F2s and backcross 1 populations will be
phenotypically evaluated to determine any relationship between
observed resistance and presence of SSR marker.
Subjects
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