Title
Comparative transcriptional profiling and preliminary study on heterosis mechanism of super-hybrid rice
Author
Song, G.S.
Zhai, H.L.
Peng, Y.G.
Zhang, L.
Wei, G.
Chen, X.Y.
Xiao, Y.G.
Wang, L.
Chen, Y.J.
Wu, B.
Chen, B.
Zhang, Y.
Chen, H.
Feng, X.J.
Gong, W.K.
Liu, Y.
Yin, Z.J.
Wang, F.
Liu, G.Z.
Xu, H.L.
Wei, X.L.
Zhao, X.L.
Ouwerkerk, P.B.F.
Hankemeier, T.
Reijmers, T.
van der Heijden, R.
Lu, C.M.
Wang, M.
van der Greef, J.
Zhu, Z.
TNO Kwaliteit van Leven
Publication year
2010
Abstract
Heterosis is a biological phenomenon whereby the offspring from two parents show improved and superior performance than either inbred parental lines. Hybrid rice is one of the most successful apotheoses in crops utilizing heterosis. Transcriptional profiling of F1 super-hybrid rice Liangyou-2186 and its parents by serial analysis of gene expression (SAGE) revealed 1183 differentially expressed genes (DGs), among which DGs were found significantly enriched in pathways such as photosynthesis and carbon-fixation, and most of the key genes involved in the carbon-fixation pathway exhibited up-regulated expression in F1 hybrid rice. Moreover, increased catabolic activity of corresponding enzymes and photosynthetic efficiency were also detected, which combined to indicate that carbon fixation is enhanced in F1 hybrid, and might probably be associated with the yield vigor and heterosis in super-hybrid rice. By correlating DGs with yield-related quantitative trait loci (QTL), a potential relationship between differential gene expression and phenotypic changes was also found. In addition, a regulatory network involving circadian-rhythms and light signaling pathways was also found, as previously reported in Arabidopsis, which suggest that such a network might also be related with heterosis in hybrid rice. Altogether, the present study provides another view for understanding the molecular mechanism underlying heterosis in rice. © The Author 2010.
Subject
Nutrition
Analytical research
carbon fixation
Heterosis
photosynthesis
regulatory network
super-hybrid rice
transcriptional profiling
To reference this document use:
http://resolver.tudelft.nl/uuid:dda59b7a-a8dc-4f62-841e-acee3e731e99
DOI
https://doi.org/10.1093/mp/ssq046
TNO identifier
426003
ISSN
1674-2052
Source
Molecular Plant, 3 (6), 1012-1025
Document type
article