Arabidopsis Col/L er and Ws/L er hybrids and Hybrid Mimics produce seed yield heterosis through increased height, inflor
- PDF / 6,662,207 Bytes
- 13 Pages / 595.276 x 790.866 pts Page_size
- 7 Downloads / 136 Views
ORIGINAL ARTICLE
Arabidopsis Col/Ler and Ws/Ler hybrids and Hybrid Mimics produce seed yield heterosis through increased height, inflorescence branch and silique number Li Wang1 · Moe Yamashita2 · Ian K. Greaves3 · W. James Peacock1,3 · Elizabeth S. Dennis1,3 Received: 22 May 2020 / Accepted: 18 August 2020 © Springer-Verlag GmbH Germany, part of Springer Nature 2020
Abstract Main conclusion The seed yield increase of the hybrids and their derived Mimics compared to parents is associated with increased plant height and inflorescence branch number which are correlated with decreased expression of FT, SOC1 and FUL. Abstract In Arabidopsis, plant size has been extensively investigated, but few studies have been carried out on seed yield heterosis. In hybrids between Columbia (Col) and Landsberg erecta (Ler), and Wassilewskija (Ws) and Ler, there was significant seed yield heterosis. F6/F7 Hybrid Mimics derived from hybrids of each of the two systems had seed yield increases similar to that of the F1 hybrid (approximately 50–70% greater than the average of the parents). Increased seed yield of the Hybrid Mimics was accompanied by changes of plant architecture with increased plant height and increased inflorescence branch number relative to the parents. Three of the Hybrid Mimic lines derived from the Ws/Ler system had 20% increase in seed yield relative to the F1 hybrid. Genes which repress flowering were up-regulated and the expression levels of flowering -promoting genes including FLOWERING LOCUS T (FT), SUPPRESSOR OF OVEREXPRESSION OF CO 1 (SOC1) and FRUITFULL (FUL) were negatively correlated with the increase in seed yield in both hybrids and F7 Mimics of both systems. Keywords Biomass · FT · Flowering time · FUL · Heterosis · SOC1 · Shoot development Abbreviations CKX CYTOKININ OXIDASE/DEHYDROGENASE DAS Days after sowing FT FLOWERING LOCUS T FUL FRUITFULL GPA Global proliferative arrest
MPV Mid-parent value PIN1 PINFORMED1 PIN7 PINFORMED7 SNP Single nucleotide polymorphism SOC1 SUPPRESSOR OF OVEREXPRESSION OF CO 1
Introduction Communicated by Dorothea Bartels. Electronic supplementary material The online version of this article (https://doi.org/10.1007/s00425-020-03444-9) contains supplementary material, which is available to authorized users. * Elizabeth S. Dennis [email protected] 1
Faculty of Science, University of Technology, Sydney, NSW 2007, Australia
2
Graduate School of Agricultural Science, Kobe University, Rokkodai, Nada‑ku, Kobe 657‑8501, Japan
3
Agriculture and Food, Commonwealth Scientific Industrial Research Organisation, Canberra, ACT 2601, Australia
Hybrids have proved to be of great value in major food crops due to increased biomass and/or greater seed yield over parental lines (Crow 1998; Cheng et al. 2007). Two key characteristics of F1 hybrids are phenotypic uniformity and high productivity. In hybrids of a number of crop species the F2 population is heterogeneous and loses both the yield advantage of the hybrid and its phenotypic uniformity (Greaves
Data Loading...
