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determination of genetic diversity between eggplant and its wild ...

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Figure 1.5. Production <strong>and</strong> clustering <strong>of</strong> ESTs from genomic DNA.<br />

(Source: Rudd 2003)<br />

SSR is a PCR based molecular method (Staub <strong>and</strong> Serquen 1996 <strong>and</strong> Jones et al.<br />

1997). The principle is the detection <strong>of</strong> polymorphisms resulting from different numbers<br />

<strong>of</strong> repeat un<strong>its</strong> in different individuals <strong>and</strong> is observed codominantly (Powell et al. 1996,<br />

Jones et al. 1997 <strong>and</strong> Henry 1999). The level <strong>of</strong> polymorphism is very high which<br />

makes SSR an ideal marker for mapping <strong>and</strong> <strong>diversity</strong> studies, fingerprinting <strong>and</strong><br />

population <strong>genetic</strong>s (Powell et al. 1996, Jones et al. 1997, Mohan et al. 1997 <strong>and</strong><br />

Nunome et al. 2003a). It has an easy application procedure which is basic PCR<br />

amplification <strong>of</strong> the sample <strong>and</strong> then detection <strong>of</strong> the b<strong>and</strong>s (Powell et al. 1996 <strong>and</strong><br />

Jones et al. 1997). However, the major disadvantage is related with development <strong>of</strong> SSR<br />

primers which is defined above.<br />

10

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