Analysis of the genetic architecture of maize ear and grain morphological traits by combined linkage and association mapping
| Autor: | Zhiqiang Zhou, Fangjun Zhang, Hongjun Yong, Chaoshu Zhang, Zhenhua Wang, Xinhai Li, Degui Zhang, Mingshun Li, Jianfeng Weng, Zhuanfang Hao, Xiaochong Zhang |
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| Rok vydání: | 2017 |
| Předmět: |
0106 biological sciences
0301 basic medicine Genetic Linkage Quantitative Trait Loci Population Locus (genetics) Environment Biology Quantitative trait locus Polymorphism Single Nucleotide Zea mays 01 natural sciences 03 medical and health sciences Family-based QTL mapping Genetics Allele Association mapping education Genetic Association Studies education.field_of_study Chromosome Mapping food and beverages Genetic Pleiotropy General Medicine Genetic architecture 030104 developmental biology Linkage based QTL mapping Seeds Edible Grain Agronomy and Crop Science 010606 plant biology & botany Biotechnology |
| Zdroj: | Theoretical and Applied Genetics. 130:1011-1029 |
| ISSN: | 1432-2242 0040-5752 |
| DOI: | 10.1007/s00122-017-2867-7 |
| Popis: | Using combined linkage and association mapping, 26 stable QTL and six stable SNPs were detected across multiple environments for eight ear and grain morphological traits in maize. One QTL, PKS2, might play an important role in maize yield improvement. In the present study, one bi-parental population and an association panel were used to identify quantitative trait loci (QTL) for eight ear and grain morphological traits. A total of 108 QTL related to these traits were detected across four environments using an ultra-high density bin map constructed using recombinant inbred lines (RILs) derived from a cross between Ye478 and Qi319, and 26 QTL were identified in more than two environments. Furthermore, 64 single nucleotide polymorphisms (SNPs) were found to be significantly associated with the eight ear and grain morphological traits (−log10(P) > 4) in an association panel of 240 maize inbred lines. Combining the two mapping populations, a total of 17 pleiotropic QTL/SNPs (pQTL/SNPs) were associated with various traits across multiple environments. PKS2, a stable locus influencing kernel shape identified on chromosome 2 in a genome-wide association study (GWAS), was within the QTL confidence interval defined by the RILs. The candidate region harbored a short 13-Kb LD block encompassing four SNPs (SYN11386, PHM14783.16, SYN11392, and SYN11378). In the association panel, 13 lines derived from the hybrid PI78599 possessed the same allele as Qi319 at the PHM14783.16 (GG) locus, with an average value of 0.21 for KS, significantly lower than that of the 34 lines derived from Ye478 that carried a different allele (0.25, P |
| Databáze: | OpenAIRE |
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