{TAIL ~ Map comparisons} would involve hybridizations, RFLP, PCR, SSR and {HEAD ~ sequencing}, all of which are conventional techniques 
{ TAIL ~ Map comparisons } would involve hybridizations , RFLP , PCR , SSR and { HEAD ~ sequencing } , all of which are conventional techniques
TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH