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TeoNAM: A Nested Association Mapping Population for Domestication and Agronomic Trait Analysis in Maize

Qiuyue ChenLaboratory of Genetics, University of Wisconsin–Madison, Wisconsin 53706Chin Jian YangLaboratory of Genetics, University of Wisconsin–Madison, Wisconsin 53706Alessandra M. YorkLaboratory of Genetics, University of Wisconsin–Madison, Wisconsin 53706Wei XueLaboratory of Genetics, University of Wisconsin–Madison, Wisconsin 53706Lora L. DaskalskaLaboratory of Genetics, University of Wisconsin–Madison, Wisconsin 53706Craig A. DeValkLaboratory of Genetics, University of Wisconsin–Madison, Wisconsin 53706Kyle W. KruegerLaboratory of Genetics, University of Wisconsin–Madison, Wisconsin 53706Samuel B. LawtonLaboratory of Genetics, University of Wisconsin–Madison, Wisconsin 53706Bailey G. SpiegelbergLaboratory of Genetics, University of Wisconsin–Madison, Wisconsin 53706Jack SchnellLaboratory of Genetics, University of Wisconsin–Madison, Wisconsin 53706Michael A. NeumeyerLaboratory of Genetics, University of Wisconsin–Madison, Wisconsin 53706Joseph S. PerryLaboratory of Genetics, University of Wisconsin–Madison, Wisconsin 53706Aria C. PetersonLaboratory of Genetics, University of Wisconsin–Madison, Wisconsin 53706Brandon KimLaboratory of Genetics, University of Wisconsin–Madison, Wisconsin 53706Laura BergstromLaboratory of Genetics, University of Wisconsin–Madison, Wisconsin 53706Liyan YangLaboratory of Genetics, University of Wisconsin–Madison, Wisconsin 53706Isaac C. BarberLaboratory of Genetics, University of Wisconsin–Madison, Wisconsin 53706Feng TianNational Maize Improvement Center, Key Laboratory of Biology and Genetic Improvement of Maize (MOA), Beijing Key Laboratory of Crop Genetic Improvement, Joint International Research Laboratory of Crop Molecular Breeding, China Agricultural University, Beijing 100193, ChinaJohn DoebleyLaboratory of Genetics, University of Wisconsin–Madison, Wisconsin 53706

2019en

ABI

Annotatsiya

Abstract Recombinant inbred lines (RILs) are an important resource for mapping genes controlling complex traits in many species. While RIL populations have been developed for maize, a maize RIL population with multiple teosinte inbred lines as parents has been lacking. Here, we report a teosinte nested association mapping (TeoNAM) population, derived from crossing five teosinte inbreds to the maize inbred line W22. The resulting 1257 BC1S4 RILs were genotyped with 51,544 SNPs, providing a high-density genetic map with a length of 1540 cM. On average, each RIL is 15% homozygous teosinte and 8% heterozygous. We performed joint linkage mapping (JLM) and a genome-wide association study (GWAS) for 22 domestication and agronomic traits. A total of 255 QTL from JLM were identified, with many of these mapping near known genes or novel candidate genes. TeoNAM is a useful resource for QTL mapping for the discovery of novel allelic variation from teosinte. TeoNAM provides the first report that PROSTRATE GROWTH1, a rice domestication gene, is also a QTL associated with tillering in teosinte and maize. We detected multiple QTL for flowering time and other traits for which the teosinte allele contributes to a more maize-like phenotype. Such QTL could be valuable in maize improvement.

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Identifikatorlar

DOI: 10.1534/genetics.119.302594

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