Pak. J. Bot., 37(1): 87-96, 2005. | Back to Contents | ||||
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Updated: 09-07-09 | ||||
RELATIONSHIP BETWEEN SDS-PAGE MARKERS AND ASCOCHYTA BLIGHT IN CHICKPEA SHEIKH MUHAMMAD IQBAL*, ABDUL GHAFOOR AND NAJMA AYUB**
Abstract: The study was conducted to determine the relationship of chickpea genotypes
towards blight disease reaction, in vitro growth of A. rabiei
on sap extracted from chickpea and seed protein pattern by SDS-PAGE.
Seed proteins were analyzed through slab type SDS-PAGE using 11.25%
Polyacrylamide gel and 6 ml of sample quantity. Most of the genotypes
grouped on the basis of disease reaction and in-vitro fungus
growth but no association between disease and SDS-PAGE was observed.
Out of 12 SDS-PAGE markers, 6 were polymorphic and gel was divided into
three regions. The genotypes with similar banding patterns were suggested
to test by 2-D electrophoresis and DNA markers for genetic diversity.
Cluster analysis revealed mixed grouping of susceptible and tolerant
genotypes that indicated no response for classifying chickpea for disease
reaction on the basis of SDS-PAGE. A low level of genetic diversity
was observed among 57 genotypes although those originated from diverse
sources. As SDS-PAGE alone did not exhibit high level of variation rather
disease rating was more reliable than protein peptides, but simultaneous
study for both aspects (disease and biochemical analysis) is suggested.
Due to less effectiveness of SDS-PAGE in resolving intra-specific genetic
diversity in cultivated chickpea and disease reaction, wild Cicer
spp., are suggested to be included. Further, biochemical markers are
suggested to enhance by adding DNA markers (RAPD, RFLP, AFLP) in relation
with Ascochyta blight for further evaluation and screening that
will help in marker assisted selection (MAS).
National Agricultural Research Centre (NARC), Islamabad, Pakistan. |
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