De novo and reference transcriptome assembly of transcripts expressed during flowering provide insight into seed setting in tetraploid red clover.

Autor: Kovi MR; Department of Plant Sciences, Norwegian University of Life Sciences, NO-1432 Ås, Norway., Amdahl H; Department of Plant Sciences, Norwegian University of Life Sciences, NO-1432 Ås, Norway.; Graminor Breeding AS, Hommelstadvegen 60, NO-2322, Ridabu, Norway., Alsheikh M; Department of Plant Sciences, Norwegian University of Life Sciences, NO-1432 Ås, Norway.; Graminor Breeding AS, Hommelstadvegen 60, NO-2322, Ridabu, Norway., Rognli OA; Department of Plant Sciences, Norwegian University of Life Sciences, NO-1432 Ås, Norway.
Jazyk: angličtina
Zdroj: Scientific reports [Sci Rep] 2017 Mar 13; Vol. 7, pp. 44383. Date of Electronic Publication: 2017 Mar 13.
DOI: 10.1038/srep44383
Abstrakt: Red clover (Trifolium pratense L.) is one of the most important legume forage species in temperate livestock agriculture. Tetraploid red clover cultivars are generally producing less seed than diploid cultivars. Improving the seed setting potential of tetraploid cultivars is necessary to utilize the high forage quality and environmentally sustainable nitrogen fixation ability of red clover. In the current study, our aim was to identify candidate genes involved in seed setting. Two genotypes, 'Tripo' with weak seed setting and 'Lasang' with strong seed setting were selected for transcriptome analysis. De novo and reference based analyses of transcriptome assemblies were conducted to study the global transcriptome changes from early to late developmental stages of flower development of the two contrasting red clover genotypes. Transcript profiles, gene ontology enrichment and KEGG pathway analysis indicate that genes related to flower development, pollen pistil interactions, photosynthesis and embryo development are differentially expressed between these two genotypes. A significant number of genes related to pollination were overrepresented in 'Lasang', which might be a reason for its good seed setting ability. The candidate genes detected in this study might be used to develop molecular tools for breeding tetraploid red clover varieties with improved seed yield potentials.
Databáze: MEDLINE