Revilla Pedro, Butrón Ana, Ordás Bernardo, Soengas Pilar, Ordás Amando, Malvar Rosa Ana
Misión Biológica de Galicia, Consejo Superior de Investigaciones Cientificas, Apartado 28, 36080 Pontevedra, Spain.
J Econ Entomol. 2007 Feb;100(1):209-14.
Resistance to corn borers, Ostrinia nubilalis (Hübner) (Lepidoptera: Crambidae) and Sesamia nonagrioides (Lefebvre) (Lepidoptera: Noctuidae) in maize, Zea mays L., populations is partial, and more resistant populations are needed. The objective of this research was to compare resistance to corn borers of the main maize races from North America. Twenty open-pollinated maize populations belonging to the races Southern Dent, Corn Belt Dent, and Northern Flint, and three check populations, were evaluated under artificial infestation with S. nonagrioides and O. nubilalis. None of the populations had complete resistance. Northern Flint had the lowest yield under corn borer infestation, whereas Southern Dent had the highest yield but also the largest damage. Corn Belt Dent had a shorter growing cycle and similar yield of infected plants than Southern Dent. The checks had intermediate yield and resistance and were not significantly different from Corn Belt Dent for any trait. The Southern Dent populations Tennessee Red Cob and White Dent (PI221885 and PI311232) could be used as sources of tolerance to corn borers, although they are not expected to provide great gains compared with the levels of tolerance already present in some Corn Belt Dent and European Flint populations and would require adaptation to short growing cycle. The Corn Belt Dent synthetic BS17 had the highest yield and general agronomic performance under corn borer infestation, along with Rustler and Silver King, and the European Flint composite EPS13.
玉米（Zea mays L.）群体对玉米螟（Ostrinia nubilalis (Hübner)，鳞翅目：草螟科）和地中海玉米螟（Sesamia nonagrioides (Lefebvre)，鳞翅目：夜蛾科）的抗性是部分抗性，因此需要更多抗性更强的群体。本研究的目的是比较北美主要玉米品种对玉米螟的抗性。在人工接种地中海玉米螟和欧洲玉米螟的条件下，对属于南方马齿型、玉米带马齿型和北方硬粒型这三个品种的20个开放授粉玉米群体以及三个对照群体进行了评估。没有一个群体具有完全抗性。在玉米螟侵害下，北方硬粒型的产量最低，而南方马齿型的产量最高，但受害程度也最大。玉米带马齿型的生长周期较短，受感染植株的产量与南方马齿型相似。对照群体的产量和抗性处于中等水平，在任何性状上与玉米带马齿型均无显著差异。南方马齿型群体田纳西红穗轴和白马齿（PI221885和PI31l232）可作为耐玉米螟的来源，尽管与一些玉米带马齿型和欧洲硬粒型群体现有的耐虫水平相比，预计它们不会带来很大的增产效果，并且需要适应较短的生长周期。在玉米螟侵害下，玉米带马齿型合成种BS17以及Rustler和银王的产量和总体农艺性能最高，欧洲硬粒型合成种EPS13也是如此。
