Hybrid mushroom strain B14528 and descendants thereof

1. A hybrid mushroom culture of Agaricus bisporus designated as strain B14528, a representative culture of the strain having been deposited under NRRL Accession No. 50900.

2. A part of the hybrid mushroom culture of claim 1 selected from the group consisting of hyphae, spores, and cells and parts of cells, selected from nuclei, and protoplasts.

3. The part of the hybrid mushroom culture of claim 2 , wherein the spores are selected from dormant and germinated spores, and wherein the dormant and germinated spores include heterokaryons and homokaryons.

4. A product comprising the hybrid mushroom culture of Agaricus bisporus designated as strain B14528 of claim 1 , the product selected from the group consisting of mycelium, spawn, inoculum, casing inoculum, fresh mushrooms, processed mushrooms, mushroom pieces, and colonized substrates including grain, compost, and friable particulate matter.

5. An Essentially Derived Variety of the hybrid mushroom culture of claim 1 , wherein said Essentially Derived Variety is a culture of a strain derived from a single initial culture of strain B14528, wherein a culture of the strain B14528 has been deposited under NRRL Accession Number 50900, such that at least 75%, of its genome or genotype is present in the genome or genotype of the initial culture of strain B14528.

6. A hybrid mushroom culture of Agaricus bisporus having a genotypic fingerprint which has alleles at marker loci ITS, p1n150-G3-2, MFPC-1-ELF, AS, AF, and FF, wherein all of the alleles at marker loci ITS, p1n150-G3-2, MFPC-1-ELF, AN, AF, and FF of said fingerprint are present in the genotypic fingerprint of strain B14528, wherein a culture of strain B14528 has been deposited under the NRRL Accession Number 50900.

7. The hybrid mushroom culture of claim 6 , wherein said culture has a genotypic fingerprint which has allelic characters at marker loci described in a column labeled B14528 of Table V, wherein all of the allelic characters of said fingerprint are present in the genotypic fingerprint of strain B14528, wherein a culture of strain B14528 has been deposited under the NRRL Accession Number 50900.

8. An Agaricus bisporus culture having all of the physiological and morphological characteristics of strain B14528, wherein a culture of strain B14528 has been deposited under the NRRL Accession Number 50900.

9. A method of producing a hybrid mushroom culture of Agaricus bisporus comprising mating a homokaryotic line B12998-s39, a culture of which has been deposited under NRRL Accession No. 50899, with a homokaryotic line obtained from a BW-type hybrid strain.

10. The method of claim 9 , wherein the homokaryotic line obtained from a BW-type hybrid strain is a homokaryotic line BW-s191.

11. The method according to claim 9 , wherein said hybrid mushroom culture exhibits antagonism toward heterokaryon strains in the OFB and Heirloom derived lineage groups.

12. The method according to claim 9 , further comprising: providing the mushroom culture in mushroom products selected from the group consisting of mycelium, spawn, inoculum, casing inoculum, fresh mushrooms, processed mushrooms, parts of mushrooms, mushroom pieces, and colonized substrates including grain, compost, and friable particulate matter.

13. The method according to claim 9 , further comprising: providing the mushroom culture in derived cultures selected from the group consisting of homokaryons, heterokaryons, aneuploids, somatic subcultures, tissue explants cultures, protoplasts, dormant spores, germinating spores, inbred descendents and outbred descendents, transgenic cultures, and cultures having a genome incorporating a single locus conversion.

14. A culture produced by the method of claim 9 .

15. The method of claim 9 , further comprising growing the hybrid mushroom culture to produce hybrid mushrooms and parts of mushrooms.

16. The method of claim 9 , wherein the hybrid mushroom culture produced comprises a marker profile having alleles at marker loci ITS, p1n150-G3-2, MFPC-1-ELF, AS, AF, and FF, wherein all of the alleles at marker loci ITS, p1n150-G3-2, MFPC-1-ELF, AS, AF, and FF of said marker profile are also present in the marker profile of B14528, wherein a culture of strain B14528 has been deposited under the NRRL Accession Number 50900.

17. A cell of the hybrid culture produced by the method of claim 9 .

18. The cell of claim 17 , further comprising a marker profile having alleles at marker loci ITS, p1n150-G3-2, MFPC-1-ELF, AS, AF, and FF, wherein all of the alleles at marker loci ITS, p1n150-G3-2, MFPC-1-ELF, AS, AF, and FF of said marker profile are also present in the marker profile of strain B14528, wherein a culture of strain B14528 has been deposited under NRRL Accession Number 50900.

19. The cell of claim 17 , further comprising a marker profile having allelic characters at marker loci described in a column labeled B14528 of Table V, wherein all of the allelic characters of said marker profile are also present in the marker profile of strain B14528, wherein a culture of strain B14528 has been deposited under NRRL Accession Number 50900.

20. A culture comprising the cell of claim 17 .

21. An Essentially Derived Variety of the hybrid mushroom culture of claim 1 , wherein said Essentially Derived Variety is a culture of a strain derived from an Essentially Derived Variety of a single initial culture of strain B14528, wherein a culture of the strain B14528 has been deposited under NRRL Accession Number 50900, such that at least 75%, of its genome or genotype is present in the genome or genotype of the initial culture of strain B14528.

22. An Essentially Derived Variety of the hybrid mushroom culture of claim 1 , wherein at least 75% of the genome or genotype of said Essentially Derived Variety is present in the genome or genotype of the initial culture of strain B14528, wherein a culture of the strain B14528 has been deposited under NRRL Accession Number 50900.