Use of plant senescence as an intra-cultivar selection criterion for soybean (Glycine max) resistance to Macrophomina phaseolina

Reference Report for SoyBase525981240

Title:	Use of plant senescence as an intra-cultivar selection criterion for soybean (Glycine max) resistance to Macrophomina phaseolina
Authors:	Canaday, C.H., Helsel, D.G., Wyllie, T.D.
Source:	Phytopath. 1985, 75(11):1316
Abstract:	Four cultivars were evaluated for differences in senescence (SEN) during development stages R7 to R8 on a 0 to 4 scale, where 0 = very premature SEN, 1 = premature, 2 = average, 3 = delayed and 4 = very delayed. SEN was generally true-breeding, strongly related to percentage of taproot discoloured with microsclerotia of M. phaseolina at harvest maturity (%MS) and moderately related to yield. Correlation coefficients for SEN vs. %MS were -0.99, -0.94, -0.65 and -0.99 for Union, Williams 79, Cumberland and Elf, respectively, while correlation coefficients for SEN vs. yield were 0.54, 0.77, 0.65 and 0.23, respectively. It is concluded that SEN is a promising intracultivar selection criterion for resistance to M. phaseolina

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