IOCAS-IR  > 实验海洋生物学重点实验室
Thesis Advisor逄少军
Degree Grantor中国科学院大学
Place of Conferral中国科学院海洋研究所
Degree Name理学博士








Saccharina japonica is one of the most important economic seaweeds in China and of great significance for farming industry. Study on crucial reproduction and  cultivation problems which are involved in variety breeding of S. japonica such as sorus formation, seedling production, ability of haptera attachment and the handling of the harmful seaweed—Sargassum horneri can help us improve the breeding technology and increase the efficiency of farming process.

The thesis includes four parts as follows:

1) Study on sorus formation of the hybrid cultivar B013 during the large scale production of seedling period. In order to understand the relationship between the timing of crossing of the parental gametophytes and sporogenesis of their sporophyte offspring in cultivar B013, we crossed the parental gametophytes for four times in May, June, July and August in 2014 respectively and performed open-sea cultivation at Lvshun, Dalian in surface water until September of 2015. Results showed that 100% of the May group and 80% of the June group formed 6-cm wide and 50-cm long sori in the apical one-third zone of the blade for the first time in the mid of January. No sorus formed in August group until September. These results suggest that there are no clear co-relations between timing of fertilization and sporogenesis in the cultivar B013. Prolonging growth period is useless to induce timely sorus formation in B013.

2) Study on the optimization of the nutrient addation during the “summer-sporeling” production. In this case study, the entire process of a commercial hatchery manipulation in 2015’s production season at Lvshun, Dalian, northern China is presented, including pre-treatment of parental plants, control of spore release, control and adjustment of solar irradiance and temperature at different developmental stages of the plants as well as the nutrient supply regime over the entire course. These results suggest that emerged sporophytes on the string requires more P during the entire process and constant supply of sufficient nutrients day and night. According to the data and process in this report, we make an optimization of the “summer-sporeling” which proved useful for husbandry of seedlings.

3) Study on the overhigh problem of detachment of the adult sporophytes. To elucidate the reason, hapteras of the individually farmed plants from different cultivars were checked on longline in the production season of 2016-2017. In the mean times, culture experiments were carried out in indoor flow-through tanks so as to make us understand how haptera of this species develops on substrate. It is recommended that proper plant density on rope and timely adjustment according to water transparency be implemented in farming practice. But for the long run, cultivar improvement is the essential issue that should be focused.

4) Study on origin of the drifting harmful algae— Sargassum horneri on the kelp culture system. In this study, 16 populations including 3 benthic ones and 13 drifting ones were collected from The Yellow Sea and East China Sea. They were investigated using SSR (Microsatellite or Simple Sequence Repeat) markers. Cluster analysis showed that in general the drifting populations from the same year rather than from the similar location were clustered together. The existence of marked admixture in six populations also implies that the same drifting population could be of different origins. These results provide evidence suggesting that the drifting populations along the nearshore waters of China, in particular the populations occurring in different years, were originated from multiple sources.

MOST Discipline Catalogue理学 ; 理学::海洋科学
Document Type学位论文
Recommended Citation
GB/T 7714
苏丽. 与海带品种培育相关的繁殖与栽培问题的研究[D]. 中国科学院海洋研究所. 中国科学院大学,2018.
Files in This Item:
File Name/Size DocType Version Access License
与海带品种培育相关的繁殖与栽培问题的研究(5435KB)学位论文 开放获取CC BY-NC-SAView Application Full Text
Related Services
Recommend this item
Usage statistics
Export to Endnote
Google Scholar
Similar articles in Google Scholar
[苏丽]'s Articles
Baidu academic
Similar articles in Baidu academic
[苏丽]'s Articles
Bing Scholar
Similar articles in Bing Scholar
[苏丽]'s Articles
Terms of Use
No data!
Social Bookmark/Share
File name: 与海带品种培育相关的繁殖与栽培问题的研究.pdf
Format: Adobe PDF
All comments (0)
No comment.

Items in the repository are protected by copyright, with all rights reserved, unless otherwise indicated.