海藻种质库研究成果–海带基础和应用研究

海藻种质库研究团队长期致力于海带基础繁育生物学和产业化应用研究,取得系列重要成果,包括:(1)优化了海带夏苗工艺,应用于龙头企业大规模育苗生产,降低了海带种苗培育成本[1];(2)国际上首次揭示了海带精子寿命,证实了传统海带夏苗工艺存在精子污染、品种混杂的现象[2,3];(3)利用分子标记微卫星技术,对中国海带进行了溯源研究,佐证了我国海带来源于日本北海道的观点[4];(4)突破了杂交海带不育技术瓶颈,实现了杂交海带性成熟人工诱导并得到大规模产业化应用[5];(5)研发了海带单倍体克隆杂交工艺,成功培育了杂交海带205和杂交海带E25。

海带是世界养殖规模最大、历史最长、产量最高、影响最为深远的大型经济海藻。近年来,海带品种混杂、优良品种退化制约着海带养殖业的发展,品种改良和新品种培育成为海带研究的重点。团队取得的上述研究成果为海带良种产业化的发展奠定了基础。

 

 

Reproduction biology and farming research of Saccharina japonica

 

The research team of the Marine Algal Culture Collection Centre (www.caslivealgae.com) has focused on reproduction biology and commercial cultivation of the brown seaweed Sacharina japonica for a long time. A series of important progresses have been made including: (1) optimization of the kelp “summer-sporeling”technique[1]; (2) successful determination of the life-span of spermatozoid of S. japonica and confirmation of the presence of sperm-contamination in the seedling production during hatchery[2, 3]; (3) confirmation of the fact that S. japonica was originally from Hokkaido Japan by use of SSR techniques[4];(4) technical breakthrough of sorus induction in the hybrid cultivar of S. japonica[5]; (5) development of intraspecific crossing technique using unialgal gametophyte clones and successful breeding of two hybrid cultivars 205 and E25.

S. japonica is the most important farmed seaweed in the world in terms of farming history, cultivation scale, production yield and social impact. The achievements the team made have paved a way of future development of this kelp.

 

 

[1] Su L, Pang SJ, Shan TF, Li X. 2017. Large-scale hatchery of the kelp Saccharina japonica: a case study experience at Lvshun in northern China. Journal of Applied Phycology 29: 3003-3013.

https://link.springer.com/article/10.1007%2Fs10811-017-1154-y#citeas

[2] Li J, Pang S, Liu F, Shan T, Gao S. 2013. Spermatozoid life-span of two brown seaweeds, Saccharina japonica and Undaria pinnatifida, as measured by fertilization efficiency. Chinese Journal of Oceanology and Limnology 31: 774-781.

https://link.springer.com/article/10.1007%2Fs00343-013-2207-y

[3] Li J, Pang S, Shan T, Gao S. 2016. Investigation of Variety Contamination in Seedling Production Process of the Brown Seaweed Saccharina japonica Using Parthenogenesis Test. Journal of Agricultural Science and Technology 18(4): 163-167. (in Chinese with English abstract).

http://kns.cnki.net/KXReader/Detail?TIMESTAMP=637194230770796250&DBCODE=CJFQ&TABLEName=CJFDLAST2016&FileName=NKDB201604024&RESULT=1&SIGN=NsN4DQW5kqbZb89eoSNZq2jYDdo%3d

[4] Shan T, Yotsukura N, Pang S. 2017. Novel implications on the genetic structure of representative populations of Saccharina japonica (Phaeophyceae) in the Northwest Pacific as revealed by highly polymorphic microsatellite markers. Journal of Applied Phycology 29: 631-638.

https://link.springer.com/article/10.1007/s10811-016-0888-2

[5] Su L, Shan TF, Li J, Pang SJ, Leng XF, Zhang Y, Gao HT. 2020. Aquaculture of the hybrid cultivars of Saccharina japonica: Removing the obstacle of sori production by photoperiodic control. Aquaculture 519.

https://www.sciencedirect.com/science/article/pii/S0044848619328261?via%3Dihub

 

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