期刊
AGRONOMY-BASEL
卷 11, 期 6, 页码 -出版社
MDPI
DOI: 10.3390/agronomy11061132
关键词
corn borer; yield; cell wall hydroxycinnamates; RILs; agronomic performance; resistance
资金
- Galician Government
- Plan Estatal de Ciencia y Tecnologia de Espana (European Union funds under the FEDERprogram) [RTI2018-096776-B-C21, RTI2018-096776-B-C22, PID2019-108127RB-I00]
- National Council for Science and Technology (CONACYT), Mexico [314685]
- National Council of Science and Technology (CONACYT)
Corn borers are the most important pest affecting maize, and resistance to them can compromise plant fitness and yield. Stronger resistant maize lines may exhibit higher concentrations of cell wall-bound hydroxycinnamates, but also characteristics like early maturity, low grain moisture, and reduced plant height. Selecting for resistance may therefore have negative impacts on yield. A breeding strategy focusing on grain yield to tolerate corn borer attack is recommended.
Corn borers are the most important pest affecting maize. Resistance to corn borer attack may compromise plant fitness being detrimental for some important agronomic traits such as yield. Against the attack of this pest, cell wall-bound hydroxycinnamates have been previously described as a possible defense mechanism. In this study, agronomic characterization and cell wall-bound hydroxycinnamates quantification was performed in a subset of Recombinant Inbred Lines (RILs) from a Multiparent Advanced Generation Intercross (MAGIC) population that showed contrasting behavior against corn borer attack. Resistant lines showed greater concentration of p-coumaric acid, the only hydroxycinnamate that could have a role in the resistance in these particular materials. In addition, results indicated that resistant lines showed precocity, low grain moisture at harvest, and reduced plant height, thus, selecting for resistance may be detrimental for yield. In this way, a breeding strategy directly targeting grain yield in order to tolerate corn borer attack would be the recommended one.
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