期刊
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
卷 111, 期 6, 页码 2379-2384出版社
NATL ACAD SCIENCES
DOI: 10.1073/pnas.1317360111
关键词
QTL; plant hormone; CYP450
资金
- Higher Education Commission Pakistan
- Netherlands Organization for Scientific Research Vici [865.06.002]
- Netherlands Organization for Scientific Research Equipment [834.08.001]
- Centre for BioSystems Genomics, Netherlands Genomics Initiative/Netherlands Organisation for Scientific Research
- National Science Foundation Plant Genome Research [1026555]
- US Department of Agriculture National Institute for Food and Agriculture [2009-65300-05661]
- United Kingdom Biotechnology and Biological Science Research Council
- Government of the Rivers State of Nigeria Postgraduate Scholarship
- National Natural Science Foundation of China [31161130535]
- European Union [015468 (CEDROME)]
- Monitoring Agricultural Resources grant
- Biotechnology and Biological Sciences Research Council-Department for International Development [BBF0041841]
- BBSRC [BB/E024688/1] Funding Source: UKRI
- Biotechnology and Biological Sciences Research Council [BB/E024688/1] Funding Source: researchfish
- Division Of Integrative Organismal Systems
- Direct For Biological Sciences [1026555] Funding Source: National Science Foundation
Rice (Oryza sativa) cultivar Azucena-belonging to the Japonica subspecies-exudes high strigolactone (SL) levels and induces high germination of the root parasitic plant Striga hermonthica. Consistent with the fact that SLs also inhibit shoot branching, Azucena is a low-tillering variety. In contrast, Bala, an Indica cultivar, is a low-SL producer, stimulates less Striga germination, and is highly tillered. Using a Bala x Azucena F6 population, a major quantitative trait loci-qSLB1.1- for the exudation of SL, tillering, and induction of Striga germination was detected on chromosome 1. Sequence analysis of the corresponding locus revealed a rearrangement of a 51- to 59-kbp stretch between 28.9 and 29 Mbp in the Bala genome, resulting in the deletion of two cytochrome P450 genes-SLB1 and SLB2-with high homology to the Arabidopsis SL biosynthesis gene, MAX1. Both rice genes rescue the Arabidopsis max1-1 highly branched mutant phenotype and increase the production of the SL, ent-2'-epi-5-deoxystrigol, when overexpressed in Bala. Furthermore, analysis of this region in 367 cultivars of the publicly available Rice Diversity Panel population shows that the rearrangement at this locus is a recurrent natural trait associated with the Indica/Japonica divide in rice.
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