A worldwide maize panel revealed new genetic variation for cold tolerance
| Autor: | Pedro Revilla, M. C. Romay, Rosa Ana Malvar, Q Yi, Lorena Álvarez-Iglesias |
|---|---|
| Přispěvatelé: | Ministerio de Economía y Competitividad (España), China Scholarship Council, Agencia Estatal de Investigación (España), European Commission |
| Rok vydání: | 2021 |
| Předmět: |
Germplasm
Candidate gene Association panel Quantitative Trait Loci Quantitative trait locus Biology Cold tolerance Polymorphism Single Nucleotide Zea mays Chromosomes Plant Genetic diversity Inbred strain Genetic variation Genetics Genetic variability GWAS analysis Quantitative trait loci (QTL) Chromosome Mapping General Medicine Heritability Maize Cold Temperature Plant Breeding Phenotype Agronomy and Crop Science Genome-Wide Association Study Biotechnology |
| Zdroj: | Digital.CSIC. Repositorio Institucional del CSIC instname |
| Popis: | Maize (Zea mays L.) has limited cold tolerance, and breeding for cold tolerance is a noteworthy bottleneck for reaching the high potential of maize production in temperate areas. In this study, we evaluate a large panel of 836 maize inbred lines to detect genetic loci and candidate genes for cold tolerance at the germination and seedling stages. Genetic variation for cold tolerance was larger than in previous reports with moderately high heritability for most traits. We identified 187 significant single-nucleotide polymorphisms (SNPs) that were integrated into 159 quantitative trait loci (QTL) for emergence and traits related to early growth. Most of the QTL have small effects and are specific for each environment, with the majority found under control conditions. Favorable alleles are more frequent in 120 inbreds including all germplasm groups, but mainly from Minnesota and Spain. Therefore, there is a large, potentially novel, genetic variability in the germplasm groups represented by these inbred lines. Most of the candidate genes are involved in metabolic processes and intracellular membrane-bounded organelles. We expect that further evaluations of germplasm with broader genetic diversity could identify additional favorable alleles for cold tolerance. However, it is not likely that further studies will find favorable alleles with large effects for improving cold tolerance in maize. This work was financed by the Spanish Ministerio de Innovación y Universidades (MCIU), the Agencia Estatal de Investigación (AEI), and the European Fund for Regional Development (FEDER), UE (project code AGL2016-77628-R, PID2019-108127RB-I00). The stage of Yi Qiang in Spain was paid by the China Scholarship Council (C.S.C.) |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|