The large dsDNA viruses that are known to infect eukaryotic algae show
promise as genetic vectors for algal biotechnology. The large size (1
50-330 kbp) of these viral genomes may permit insertion of large seque
nces of foreign DNA. The viruses infecting filamentous marine brown al
gae appear to be integrated into the genomes of their hosts, and may p
rovide integration mechanisms that can be used for directing insertion
of foreign genes into algal chromosomes.