A method for identification of seaweed samples with high agar yield and gel strength by using expressed markers (transcripts and proteins). These inventions involve measurement of transcript abundance of transcript markers with quantitative reversetranscription (qRT)-PCR using specific primers, and protein accumulation of protein markers by Western blot usingspecific antibodies. The use of molecular markers (transcripts and proteins) that areassociated with agar yield and gel strength could offer a rapid and accurate screening tool needed for quick estimation of agar yield and gel strength in seaweed samples.ApplicationIdentification of seaweed samples with high agar yield andgel strength. Estimation of agar content and gel strength by using transcript and protein markers.Replace conventional method in the selection of commercially potential seaweed samples.