Indirect response to selection for improving resistance to the Mediterranean corn borer (Sesamia nonagrioides Lef) in maize
- 140 Downloads
Mediterranean corn borer (MCB) (Sesamia nonagrioides Lef) and European corn borer (ECB) (Ostrinia nubilalis Hbn) are the most important biotic stresses of maize in Europe. The first selection program to improve stalk resistance to MCB was carried out in the maize population EPS12. It has shown that selection was effective to improve stalk resistance to MCB and ECB, while yield was not significantly diminished. The objective of this research was to determine if correlated changes in EPS12 occurred due to selection for resistance to MCB. Cycles of selection per se and testcrosses to three testers were evaluated under MCB and ECB artificial infestation at two different Spanish locations during 2 years. Selection has significantly reduced cob damage, days to silking, plant and ear height, and 100-kernel weight; meanwhile early vigor was increased. These changes could rather be a consequence of unconscious selection and/or the genetic correlation of these traits with resistance than a consequence of genetic drift.
KeywordsInsect resistance Intrapopulation recurrent selection Mediterranean corn borer Maize Sesamia nonagrioides Lef
Research supported by the Plan Nacional I+D+I (AGL2003-00961 and AGL2006-1314). G. Sandoya acknowledges a fellowship from the Ministry of the Education and Science that allowed him to carry out this study; part of this study is a thesis by the senior author for the Ph.D. degree. Authors thank Raquel Díaz and Emma Muiñoz for rearing insects. Also thank to the whole field team at Misión Biológica de Galicia for field work.
- Anglade P, Gouesnard B, Boyat A, Panouillé A (1996) Effects of multitrait recurrent selection for European corn borer tolerance and for agronomic traits in FS12 maize synthetic. Maydica 41:97–104Google Scholar
- Butrón A, Widstrom NW, Snook ME, Wiseman BR (2000) Recurrent selection for corn earworm resistance in three corn synthetics. Maydica 45:295–300Google Scholar
- Cordero A, Malvar RA, Butrón A, Velasco P, Revilla P, Ordás A (1998) Population dynamics and life-cycle of corn borers in South Atlantic European coast (Lepidoptera, Noctuidae, Pyralidae). Maydica 43:5–12Google Scholar
- Eizaguirre M, Albajes R (1992) Diapause induction in the stem corn borer, Sesamia nonagrioides (Lepidoptera: Noctuidae). Entomol Gen 17:277–283Google Scholar
- Grier SL, Davis DW (1980) Infestation procedures and heritability of characters used to estimate ear damage caused by second-brood European corn borer (Ostrinia nubilalis Hübner) on corn. J Am Soc Hortic Sci 105:3–8Google Scholar
- Malvar RA, Cartea ME, Revilla P, Ordás A, Alvarez A, Mansilla JP (1993) Sources of resistance to pink stem borer and European corn borer in maize. Maydica 38:313–319Google Scholar
- Pounders CT Jr, Davis DW, Windels MB, Chiang HC (1975) Resistance to second-brood European corn borer attack in dent inbred ‘B52’ and in progeny from crosses with four sweet corn inbreds. J Am Soc Hortic Sci 100:101–103Google Scholar
- Russell WA, Lawrence GD, Guthrie WD (1979) Effects of recurrent selection for European corn borer resistance on other agronomic characters in synthetic cultivars of corn. Maydica 24:33–47Google Scholar
- SAS (2007) The SAS system. SAS online doc HTML format 8 version. SAS Institute Inc, CaryGoogle Scholar
- Steel RGD, Torrie JH (1980) Principles and procedures of statistic in biological research, 2nd edn. McGraw Hill, New YorkGoogle Scholar
- Velasco P, Revilla P, Monetti L, Butrón A, Ordás A, Malvar RA (2007) Corn borers (Lepidoptera: Noctuidae, Crambidae) in Northwestern Spain: population dynamics and distribution. Maydica 52:195–203Google Scholar