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首页> 外文期刊>Journal of Applied Phycology >Intraspecific crossing of Saccharina japonica using distantly related unialgal gametophytes benefits kelp farming by improving blade quality and productivity at Sanggou Bay, China
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Intraspecific crossing of Saccharina japonica using distantly related unialgal gametophytes benefits kelp farming by improving blade quality and productivity at Sanggou Bay, China

机译：利用远亲的单性配子体种进行的日本越橘的种内杂交，通过提高中国桑沟湾的叶片质量和生产力，使海带养殖受益

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When cultivating the kelp, Saccharina japonica, in China, one of the causes leading to degeneration in blade quality and productivity has been thought to be inbreeding caused by the use of limited numbers of sorus-bearing individuals that are continuously used over generations to produce large numbers of offspring. One of the effective solutions is to use intraspecific hybrid vigor to produce new cultivars or to recreate the original agronomic features of the older cultivars. This study produced a sporophytic B013 (cultivar code) by crossing a pair of distantly related unialgal male and female gametophyte clones. The male was isolated from an individual collected from a farmed population at Rongcheng, China, while the female came from a Korean wild individual sporophyte. In comparison with four controls, the B013 sporophytic offspring demonstrated excellent blade quality (entirely dark green in the dried product), high alginate (29.7-32.9 %) and iodine (0.29-0.31 mg g(-1)) contents in the dried product, the lowest fresh weight/sun-dried weight (FW/DW) ratio and the smallest coefficients of variation for total length (7.4 %), width (6.9 %), and biomass output (14.6 %). In addition, this cultivar remained in a vegetative state from June to August, greatly reducing the biomass loss during the hot summer season. In comparison with seeding zoospores for seedling production, seeding a selected pair of unialgal gametophytes had apparent advantages in effectively preventing inbreeding depression, which gave rise to a uniformed product and provided new cultivars for large-scale farming.
机译：在中国栽培海带（Saccharina japonica）时，人们认为导致叶片质量和生产力退化的原因之一是近交繁殖，原因是使用了数量有限的耐酸个体，这些个体持续世代生产后代的数量。一种有效的解决方案是使用种内杂种活力来生产新品种或重现旧品种的原始农艺学特征。该研究通过杂交一对远缘的一性雌雄配子体克隆产生了孢子体B013（品种代码）。雄性是从中国荣成的一个养殖场采集的个体中分离出来的，而雌性则是一种来自韩国野生个体孢子体的个体。与四个对照相比，B013孢子性后代表现出优异的叶片质量（在干燥产品中完全呈深绿色），在干燥产品中海藻酸盐（29.7-32.9％）和碘（0.29-0.31 mg g（-1））含量高，最低的鲜重/干重（FW / DW）比和最小的总长度（7.4％），宽度（6.9％）和生物量输出（14.6％）的变异系数。此外，该品种从6月到8月仍处于营养状态，大大减少了炎热夏季的生物量流失。与播种游动孢子的幼苗生产相比，播种选定的一对单性配子体在有效防止近交衰退方面具有明显的优势，这产生了均一的产品，并为大规模耕种提供了新的品种。

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