AI Article Synopsis
- Rice sheath blight, caused by the fungus Rhizoctonia solani, significantly impacts rice yield globally, with weedy rice showing better resistance than local japonica varieties.
- Researchers mapped nine quantitative trait loci (QTL) related to ShB resistance from F recombinant inbred line populations created from crosses between indica rice and US weedy rice types.
- The study indicates that improving ShB resistance can be achieved through beneficial plant growth traits and highlights a method to identify new resistance QTL by integrating growth traits into mapping models.
Article Abstract
Background: Rice sheath blight (ShB) disease, caused by the pathogenic fungus Rhizoctonia solani, causes significant yield losses globally. US weedy rice populations, which are de-domesticated forms of indica and aus cultivated rice, appear to be more resistant to ShB than local japonica cultivated rice. We mapped quantitative trait loci (QTL) associated with ShB resistance using two F recombinant inbred line populations generated from crosses of an indica crop variety, Dee-Geo-Woo-Gen (DGWG), with individuals representing the two major US weed biotypes, straw hull (SH) and black hull awned (BHA).
Results: We identified nine ShB resistance QTL across both mapping populations. Five were attributable to alleles that affect plant height (PH) and heading date (HD), two growth traits that are known to be highly correlated with ShB resistance. By utilizing an approach that treated growth traits as covariates in the mapping model, we were able to infer that the remaining four QTL are involved in ShB resistance. Two of these, qShB1-2 and qShB4, are different from previously identified ShB QTL and represent new candidates for further study.
Conclusion: Our findings suggest that ShB resistance can be improved through favorable plant growth traits and the combined effects of small to moderate-effect resistance QTL. Additionally, we show that including PH and HD as covariates in QTL mapping models is a powerful way to identify new ShB resistance QTL.
Download full-text PDF |
Source |
|---|---|
| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7090113 | PMC |
| http://dx.doi.org/10.1186/s12284-020-00381-9 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Week 96 Results of Bictegravir/Emtricitabine/Tenofovir Alafenamide for HIV Treatment in People With Substance Use Disorders.
Open Forum Infect Dis
January 2025
College of Medicine, University of Nebraska Medical Center, Omaha, Nebraska, USA.
Background: The BASE study (NCT03998176), a phase 4, 48-week (W), single-arm, prospective trial, revealed that the use of bictegravir/emtricitabine/tenofovir alafenamide (B/F/TAF) in people with HIV and substance use disorders (PWH/SUD) was safe and effective without emergent antiretroviral resistance despite incomplete adherence. Here, we present the W96 results.
Methods: A retrospective analysis of all participants enrolled in the BASE study was completed from W48 to W96.
Natural mutation in Stay-Green (OsSGR) confers enhanced resistance to rice sheath blight through elevating cytokinin content.
Plant Biotechnol J
December 2024
Jiangsu Key Laboratory of Crop Genomics and Molecular Breeding/Zhongshan Biological Breeding Laboratory/Key Laboratory of Plant Functional Genomics of the Ministry of Education, Agricultural College of Yangzhou University, Yangzhou, China.
Article Synopsis
- Sheath blight (ShB), caused by the fungus Rhizoctonia solani, is a serious problem for crops globally, and current rice varieties lack major resistance genes.
- Researchers identified a rice mutant, sbr1, which shows improved resistance to ShB while retaining normal growth traits, though it has an undesirable stay-green characteristic linked to the disruption of the Stay-Green (OsSGR) gene.
- The study found that manipulating cytokinin levels through the knockout of the OsCKX7 gene boosts ShB resistance without negatively affecting yield or causing the stay-green issue, offering new possibilities for developing resistant rice varieties.
Impact of the tripartite interaction between rice, sheath blight and diverse crop-associated endophytes on phenotypic and biochemical responses in rice.
Heliyon
June 2024
Department of Zoology, College of Science, King Saud University, 11451, Saudi Arabia.
Endophytes stimulate plant growth and inhibit phytopathogens. Most of the known endophytes are host-specific and only a few strains are effective for practical field use. Thus, this study focuses on the evaluation of endophytes .
View Article and Find Full Text PDFFertility after photodynamic inactivation of bacteria in extended boar semen.
Front Microbiol
August 2024
Unit for Reproductive Medicine/Clinic for Swine and Small Ruminants, University of Veterinary Medicine Hannover, Hannover, Germany.
Antimicrobial resistance is an increasing challenge in semen preservation of breeding animals, especially in the porcine species. Bacteria are a natural component of semen, and their growth should be inhibited to protect sperm fertilizing capacity and the female's health. In pig breeding, where semen is routinely stored at 17°C in the liquid state, alternatives to conventional antibiotics are urgently needed.
View Article and Find Full Text PDFMolecular Mapping and Transfer of Quantitative Trait Loci (QTL) for Sheath Blight Resistance from Wild Rice to Cultivated Rice ( L.).
Genes (Basel)
July 2024
School of Agricultural Biotechnology, Punjab Agricultural University, Ludhiana 141004, India.
Article Synopsis
- * The study used QTL mapping in a rice population derived from a resistant and a susceptible cultivar, identifying 29 QTLs linked to ShB resistance, with a notable cluster on chromosome 1 containing important genes for disease resistance.
- * The research also found key SSR markers that differentiate between resistant and susceptible cultivars, suggesting their use in marker-assisted selection, and identified advanced lines with better traits and increased ShB resistance suitable for further breeding efforts.
Want AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!