Genome assembly and genetic dissection of a prominent drought-resistant maize germplasm.
Nat Genet
; 55(3): 496-506, 2023 03.
Article
em En
| MEDLINE
| ID: mdl-36806841
ABSTRACT
In the context of climate change, drought is one of the most limiting factors that influence crop production. Maize, as a major crop, is highly vulnerable to water deficit, which causes significant yield loss. Thus, identification and utilization of drought-resistant germplasm are crucial for the genetic improvement of the trait. Here we report on a high-quality genome assembly of a prominent drought-resistant genotype, CIMBL55. Genomic and genetic variation analyses revealed that 65 favorable alleles of 108 previously identified drought-resistant candidate genes were found in CIMBL55, which may constitute the genetic basis for its excellent drought resistance. Notably, ZmRtn16, encoding a reticulon-like protein, was found to contribute to drought resistance by facilitating the vacuole H+-ATPase activity, which highlights the role of vacuole proton pumps in maize drought resistance. The assembled CIMBL55 genome provided a basis for genetic dissection and improvement of plant drought resistance, in support of global food security.
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1
Base de dados:
MEDLINE
Assunto principal:
Zea mays
/
Secas
Idioma:
En
Ano de publicação:
2023
Tipo de documento:
Article