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Differential growth between and within triazine-resistant and triazine-susceptible biotypes of Senecio vulgaris L



Differential growth between and within triazine-resistant and triazine-susceptible biotypes of Senecio vulgaris L



Weed Research 20(5): 299-303



A comparative study of differential growth, time to flowering and resource allocation was made on 3 triazine-resistant and 5 susceptible populations of S. vulgaris grown in the absence of herbicides under spaced non-competitive conditions. The vegetative and total biomass production of all susceptible populations was greater than that of the resistant populations. Many of the susceptible populations showed greater seedling dry weight, earlier flowering, greater reproductive dry weight and greater reproductive effort as compared with the resistant populations. Estimates of between-population differences within a given biotype indicated that the resistant populations from all 3 widely separated locations were homogeneous in their growth response. The 5 susceptible populations were more dissimilar, exhibiting a broader range of response in growth parameters.

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Accession: 000857629

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DOI: 10.1111/j.1365-3180.1980.tb01623.x


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