Volume 13 Part 2 Article 27: Improvement Oflepista Species Cultivation, Technical Factors and Selection of Strains

Volume 13 Part 2 Article 27
Year 1991
Title: Improvement Oflepista Species Cultivation, Technical Factors and Selection of Strains
Authors: J. Guinberteau, J.M. Olivier and M.N. Tanne

Abstract:

The three species of blewit.(Lepista nuda, L. sordida, L. saeva) are well appreciated in France. Our laboratory has collected a great number of wild strains of the different species from several ecological locations. It follows from the analysis of environmental data collected in the wild that blewit can be considered as a good crop for the diversification of french white mushroom farms.

The first step of the work has been the selection of wild strains, growing well on standard mushroom compost. Despite modifications of ambiant conditions and substrate compositions, we noticed irregular yields depending on the quality of the composts and on the strains ; from 100 to 190 kg of fruitbodies per ton of spawned compost, in three flushes.

Following these first trials, a small scale commercial production has been developed; French- total yearly production is estimated now somewhere between 5 and 10 tons. Besides, a collection of homokaryotic strains has been used for breeding. An heterothallic tetrapolar incompatibility has been confirmed in the different species. Hybridization between L. nuda and h. sordida cannot be achieved using classical methods. Spawn of intraspecific hybrids has been prepared in solid or liquid media. The fruiting of certain hybrids begins as early as ‘tO days after casing, with yields of the first flush between 120 and 180 kg/t . The aspects of the caps of the different hybrids can be very different and the heredity of the blue color has been specially studied.

But the best hybrids are always well adapted to fruiting at low temperature (lO-lTc) and that is considered a limiting factor to the developement of commercial production.

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