Click
here to close Hello! We notice that
you are using Internet Explorer, which is not supported by Echinobase
and may cause the site to display incorrectly. We suggest using a
current version of Chrome,
FireFox,
or Safari.
Sci Rep
2016 Feb 18;6:21255. doi: 10.1038/srep21255.
Show Gene links
Show Anatomy links
Improving seedless kelp (Saccharina japonica) during its domestication by hybridizing gametophytes and seedling-raising from sporophytes.
Li X
,
Zhang Z
,
Qu S
,
Liang G
,
Sun J
,
Zhao N
,
Cui C
,
Cao Z
,
Li Y
,
Pan J
,
Yu S
,
Wang Q
,
Li X
,
Luo S
,
Song S
,
Guo L
,
Yang G
.
???displayArticle.abstract???
Dongfang no.7 (Saccharina japonica) was bred and maintained by hybridizing gametophytes, self-crossing the best individuals, selecting the best self-crossing line and seedling-raising from yearly reconstructed sporophytes. It increased the air dry yield by 43.2% in average over 2 widely farmed controls. Dongfang no.7 was seedling-raised from bulked sporophytes reconstructed from its representative gametophyte clones. Such strategy ensured it against variety contamination due to possible cross fertilization and occasional mixing and inbred depletion due to self-crossing number-limited sporophytes year after year. It derived from an intraspecific hybrid through 4 rounds of self-crossing and selection and retained a certain degree of genetic heterozygosity, thus being immune to inbred depletion due to purification of unknown detrimental alleles. Most importantly, it can be farmed in currently available system as the seedlings for large scale culture can be raised from reconstructed Dongfang no.7 sporophytes. Breeding and maintaining Dongfang no.7 provided a model that other varieties of kelp (S. japonica) and brown algae may follow during their domestication.
Figure 1. Flow chart of breeding and maintaining Dongfang no.7 (S. japonica).
Figure 2. The morphological characteristics of Dongfang no. 7.(A), the blades of Dongfang no. 7 (below a ruler, left), Kuanbao haidai (middle) and Korean kelp (right); (B), the blade tip of Dongfang no. 7 under a ruler; (C), the widest part of Dongfang no. 7 (left), Kuanbao haidai (middle) and Korean kelp (right) under a ruler; (D), Blade disc pile, 10 each, of Dongfang no. 7 (left), Kuanbao haidai (middle) and Korean kelp (right) beside a ruler.
Figure 3. Change of the variation index of blade length (red), width (grey) and thickness (yellow) during breeding.
Cheng,
Progress in research and development on hybrid rice: a super-domesticate in China.
2007, Pubmed
Cheng,
Progress in research and development on hybrid rice: a super-domesticate in China.
2007,
Pubmed
Cock,
The Ectocarpus genome and the independent evolution of multicellularity in brown algae.
2010,
Pubmed
Huang,
Genomic analysis of hybrid rice varieties reveals numerous superior alleles that contribute to heterosis.
2015,
Pubmed
Li,
Trait evaluation and trial cultivation of Dongfang No. 2, the hybrid of a male gametophyte clone of Laminaria longissima (Laminariales, Phaeophyta) and a female one of L. japonica.
2007,
Pubmed
Liu,
Fine Mapping and Candidate Gene Analysis of qSTL3, a Stigma Length-Conditioning Locus in Rice (Oryza sativa L.).
2015,
Pubmed
Nei,
Estimation of average heterozygosity and genetic distance from a small number of individuals.
1978,
Pubmed
Ruiz-Rodriguez,
Development of 14 microsatellite markers in the Queensland koala (Phascolarctos cinereus adustus) using next generation sequencing technology.
2014,
Pubmed
Wargacki,
An engineered microbial platform for direct biofuel production from brown macroalgae.
2012,
Pubmed
Xu,
Developing high throughput genotyped chromosome segment substitution lines based on population whole-genome re-sequencing in rice (Oryza sativa L.).
2010,
Pubmed
Ye,
Saccharina genomes provide novel insight into kelp biology.
2015,
Pubmed
Zhang,
Construction of a high density SNP linkage map of kelp (Saccharina japonica) by sequencing Taq I site associated DNA and mapping of a sex determining locus.
2015,
Pubmed
,
Echinobase
Zhou,
Genetic composition of yield heterosis in an elite rice hybrid.
2012,
Pubmed