Abstract
Multiple regression predictive models based on data acquired by near-infrared (NIR) spectrophotometry suggest that stalk surface wax components contribute towards resistance toEldana saccharina Walker in sugarcane. At least 35 sugarcane clones of known resistance were required to calibrate a predictive model that accounted for approximately 54% of the variation in resistance toEldana. Wavelengths chosen in multiple regression models suggest that alcohols and carbonyls are important in the wax contribution. Through the use of wax fractionation and gas chromatography, a high alcohol/aldehyde ratio and shorter carbon chain length appears to be associated with resistance. The use of NIR in the screening of wild germplasm and the early screening of breeding material for resistance, without prior knowledge of the biochemical mechanisms involved, is an exciting prospect. However, cause-and-effect relationships remain to be shown.
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Rutherford, R.S., van Staden, J. Towards a rapid near-infrared technique for prediction of resistance to sugarcane borerEldana saccharina walker (Lepidoptera: Pyralidae) using stalk surface wax. J Chem Ecol 22, 681–694 (1996). https://doi.org/10.1007/BF02033578
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DOI: https://doi.org/10.1007/BF02033578