Journal of Applied Phycology

, Volume 29, Issue 2, pp 993–999

Existence of an intact male life cycle offers a novel way in pure-line crossbreeding in the brown alga Undaria pinnatifida


DOI: 10.1007/s10811-016-1005-2

Cite this article as:
Li, J., Pang, S. & Shan, T. J Appl Phycol (2017) 29: 993. doi:10.1007/s10811-016-1005-2


Hermaphroditic gametophyte production and an intact male life cycle were investigated in Undaria pinnatifida. Zoospore-derived hermaphroditic gametophyte could give rise to male sporophytes which showed the same morphological appearance but with smaller biomass than normal cultivated sporophytes. Male sporophytes were shown to discharge only male zoospores. In this investigation, male spores derived from the male sporophytes and female spores derived from female parthenosporophytes were crossed to produce the hybrid sporophytic offspring. The latter contained both alleles of homozygous parental sporophytes when analyzed by use of eight polymorphic microsatellite markers, further confirming the success of cross. Thus, line crossing by use of unisexual sporophytes will be expected to replace unisexual gametophyte line crossing in breeding practice in the future in this commercially farmed seaweed.


Breeding method Unisexual zoospores Parentage analysis Undaria pinnatifida, Phaeophyceae 

Funding information

Funder NameGrant NumberFunding Note
National Natural Science Foundation of China
  • 41476141
  • 41676128
Sino-German Science Center
  • GZ 1080
the scientific and technological innovation project from Qingdao National Laboratory for Marine Science and Technology
  • 2015ASKJ01
the National Infrastructure of Fishery Germplasm Resource
  • 2016DKA30470

Copyright information

© Springer Science+Business Media Dordrecht 2016

Authors and Affiliations

  1. 1.Key Laboratory of Experimental Marine Biology, Institute of OceanologyChinese Academy of SciencesQingdaoPeople’s Republic of China
  2. 2.Laboratory for Marine Biology and BiotechnologyQingdao National Laboratory for Marine Science and TechnologyQingdaoPeople’s Republic of China

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