Delaying or delivering: identification of novel NAM-1 alleles that delay senescence to extend wheat grain fill duration
| العنوان: | Delaying or delivering: identification of novel NAM-1 alleles that delay senescence to extend wheat grain fill duration |
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| المؤلفون: | Jacob Lage, Simon Orford, Elizabeth A Chapman, Simon Griffiths |
| المصدر: | Journal of Experimental Botany |
| بيانات النشر: | Oxford University Press (OUP), 2021. |
| سنة النشر: | 2021 |
| مصطلحات موضوعية: | Senescence, senescence, Physiology, Quantitative Trait Loci, Mutant, exome capture, Plant Science, Biology, Bulk segregant analysis, wheat, mutant, Allele, Gene, Alleles, Triticum, Genetic association, Genetics, AcademicSubjects/SCI01210, food and beverages, Research Papers, Phenotype, Forward genetics, forward genetics, staygreen, remobilization, Crop Molecular Genetics, NAM, grain fill, Edible Grain, Genetic screen |
| الوصف: | Senescence is a complex trait under genetic and environmental control, in which resources are remobilized from vegetative tissue into grain. Delayed senescence, or ‘staygreen’ traits, can confer stress tolerance, with extended photosynthetic activity hypothetically sustaining grain filling. The genetics of senescence regulation are largely unknown, with senescence variation often correlated with phenological traits. Here, we confirm staygreen phenotypes of two Triticum aestivum cv. Paragon ethyl methane sulfonate mutants previously identified during a forward genetic screen and selected for their agronomic performance, similar phenology, and differential senescence phenotypes. Grain filling experiments confirmed a positive relationship between onset of senescence and grain fill duration, reporting an associated ~14% increase in final dry grain weight for one mutant (P Two staygreen mutants were identified for which grain fill duration and grain weight were enhanced. Independent amino acid substitutions within NAC subdomain IV of NAM-1 homoeologues are proposed as causative. |
| تدمد: | 1460-2431 0022-0957 |
| الوصول الحر: | https://explore.openaire.eu/search/publication?articleId=doi_dedup___::676a0fdb9e72c321e8bd1bcc7e2b8902Test https://doi.org/10.1093/jxb/erab368Test |
| حقوق: | OPEN |
| رقم الانضمام: | edsair.doi.dedup.....676a0fdb9e72c321e8bd1bcc7e2b8902 |
| قاعدة البيانات: | OpenAIRE |
| تدمد: | 14602431 00220957 |
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