الفهرس 
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Abstract
The present study was carried out to determine the phenotypic
and genetic diversity of Mugil cephalus, Liza ramada and Valamugil
seheli in Egypt. Seven hundred and fifty specimens were randomly
collected from Qarun, Manzala and Burullus lakes and some
commercial farms neighboring each of the three lakes during the
period from the beginning of April 2012 to the end of March 2013.
The study was carried out at Animal Production Department, Faculty
of Agriculture, Fayoum University. Random amplified polymorphic
of DNA (RAPD) analysis was carried out at Genetic Engineering
Laboratory, Faculty of Agriculture, Cairo University.
The results from principal component analysis (PCA) showed
that most of the phenotypic variation was found on the first three axes,
which included more than 87.96%, 76.24% and 77.87% for Mugil
cephalus, Liza ramada and Valamugil seheli wild population,
respectively. The results of the DFA Step-wise explained 100% of the
variance with two functions only. Dorsal fin length (DFL), pectoral fin
length (PecFL), maximum body height (MBH), caudal peduncle depth
(CPD) and condition factor (CF) were the most important
characteristics of distinction between populations.
Highest genetic variation 37.08% in Liza ramada from lake
Manzala and the lowest difference genetic variation 24.97% in Mugil
cephalus from lake Manzala were observed. Dendrogram showed the
highest genetic similarity between Liza ramada lake Qarun and
surrounding farms.
It could be concluded that Liza ramada lake Manzala is best to
work for selection programs. There is a need for further genetic
studies to give a more complete picture of mullet in Egypt.
Key words: Mugil cephalus, Liza ramada, Valamugil seheli, Phenotypic,
Genetic Diversity, Random Amplified Polymorphic of DNA.