Our research is directed on understanding the genetics of edible mushrooms in order to improve breeding efficiency. The focus is on button mushrooms (Agaricus bisporus) and oyster mushrooms (Pleurotus ostreatus). For this we also explore the biological variation within our large collection of varieties (>5000 strains representing 125 species) by assessing genetic relatedness within species and quantifying several phenotypic characteristics.
We also explore the utilisation of fungi for selective degradation of lignin in organic (waste) materials. Research done so far has shown that a number of species degrade substantial portions of lignin while hardly consuming cellulose. These fungi can thus be used to make cellulose bioavailable in low value organic waste, upgrading it into animal feed or feedstock for the production of bioenergy.
Button mushroom is represented by two compatible subspecies differing in the interchromosomal crossovers. In commercial lines and most wild isolates, crossovers are mainly restricted to chromosome ends whereas in the other subspecies crossovers take place over the entire chromosome. Segregating populations are used now to study mechanisms behind these two recombination landscapes. This might generate knowledge to control meiosis either to enhance or retain allele combinations.
Almost all button mushroom cultivars used worldwide are very similar. Want to know why? Read the article Why are all button mushroom cultivars similar?
The utilisation of lignocellulose is limited by the presence of recalcitrant lignin. Physical and chemical pretreatments are now used to reduce/modify lignin and enhancing the access to (hemi)cellulose. White rot fungi (including many edible fungi) selectively degrade lignin during vegetative growth and can thus be used to valorise lignocellulose in a low tech, low cost and sustainable way.
Research is directed to:
- Screening optimal fungal-organic matter combinations
- Optimize conditions for selectively degrading lignin
- Using biological diversity within each fungal species to optimize lignin degradation (including breeding)
Differences between two strains of Ceriporiopsis subvermispora on improving the nutritive value of wheat straw for ruminants
Journal of Applied Microbiology 123 (2017)2. - ISSN 1364-5072 - p. 352 - 361.
Developments in breeding of Agaricus bisporus var. bisporus
Applied Microbiology and Biotechnology 101 (2017)5. - ISSN 0175-7598 - p. 1819 - 1829.
Conserving wheat straw and fungal treated wheat straw through ensiling
Chemical changes and increased degradability of wheat straw and oak wood chips treated with the white rot fungi Ceriporiopsis subvermispora and Lentinula edodes
Biomass and Bioenergy 105 (2017). - ISSN 0961-9534 - p. 381 - 391.
The effect of adding urea, manganese and linoleic acid to wheat straw and wood chips on lignin degradation by fungi and subsequent <em>in</em> <em>vitro</em> rumen degradation
Animal Feed Science and Technology 213 (2016). - ISSN 0377-8401 - p. 22 - 28.
A detailed analysis of the recombination landscape of the button mushroom Agaricus bisporus var. bisporus
Fungal Genetics and Biology 93 (2016). - ISSN 1087-1845 - p. 35 - 45.
Mushroom immunomodulation and germplasm: variation between and within mushroom species and perspectives for application.
In: Science and Cultivation of Edible Fungi. - : International Society for Mushroom Science (ISMS) - ISBN 9789090297712 - p. 281 - 284.
The effect of particle size and amount of inoculum on fungal treatment of wheat straw and wood chips
Journal of Animal Science and Biotechnology 7 (2016)1. - ISSN 1674-9782
Multi-trait QTL analysis for agronomic and quality characters of Agaricus bisporus (button mushrooms)
AMB Express 6 (2016). - ISSN 2191-0855
Selective ligninolysis of wheat straw and wood chips by the white-rot fungus Lentinula edodes and its influence on in vitro rumen degradability
Journal of Animal Science and Biotechnology 7 (2016). - ISSN 1674-9782 - 14 p.
- Karin Scholtmeijer
- Nardes Sedaghat Telgerd