Strain Improvement in Oyster Mushroom
By: Anitha R.
Contributor(s): B Balakrishnan(Guide).
Material type:
BookPublisher: Vellayani Department of Plant Pathology, College of Agriculture 1998DDC classification: 632.3 Online resources: Click here to access online | Click here to access online Dissertation note: MSc Abstract: Attempts were made to collect native flora of Pleurotus spp., by doing
intensive surveys for the same during monsoon periods. Among the various
isolates made two efficient ones were identified and described namely,
Pleurotus eous and P. petaloides. Evaluation of growth and fruiting behaviour
of these isolates done following the standard method and it is proved that
these isolates were amenable for large scale cultivation under Kerala
conditions. The two selected isolates along with the other standard cultures
procurred from various mushroom research centres of the country were
subjected to detailed observations. Strain improvement programmes have been
done following strain mixing hybridization and mutation techniques. One
recombined strain was developed through strain mixing which has got good
yield and intermediate sporocarp characters between the parents. Physical
mutation was done by irradiating them with gamma radiation. Among the
mutants three effective mutants were selected for their better sporocarp yield,
steady yielding character and resistance against insect pests and competitor
weed moulds. In the chemical mutation, one mutant having small sporocarp
with long stipe and other mutant having sporocarp with very few spores have
been developed. In hybridization, one hybrid was developed by pairing
compatible mono spore cultures of two different species of Pleurotus which
have got maximum desirable characters among the developed hybrids. Cultural
characters of the selected isolates were studied and the effect of coconut milk
in enhancing mycelial growth were proved. Periodical observatiori of the
incidence of insect pests and competitor weed moulds in the mutants, hybrids
and native isolates have been worked out. Studies on quality parameters and
consumer acceptability have proved that the native isolates were comparatively
better to the other species of Pleurotus obtained from various mushroom
research centres of the country. Organoleptic studies of selected hybrids and
mutants have been proved that they have better acceptability in the market as
compared to the standard species, Pleurotus sajor-caju.
| Item type | Current location | Call number | Status | Date due | Barcode |
|---|---|---|---|---|---|
Theses
|
KAU Central Library, Thrissur Theses | 632.3 ANI/ST (Browse shelf) | Available | 171407 |
MSc
Attempts were made to collect native flora of Pleurotus spp., by doing
intensive surveys for the same during monsoon periods. Among the various
isolates made two efficient ones were identified and described namely,
Pleurotus eous and P. petaloides. Evaluation of growth and fruiting behaviour
of these isolates done following the standard method and it is proved that
these isolates were amenable for large scale cultivation under Kerala
conditions. The two selected isolates along with the other standard cultures
procurred from various mushroom research centres of the country were
subjected to detailed observations. Strain improvement programmes have been
done following strain mixing hybridization and mutation techniques. One
recombined strain was developed through strain mixing which has got good
yield and intermediate sporocarp characters between the parents. Physical
mutation was done by irradiating them with gamma radiation. Among the
mutants three effective mutants were selected for their better sporocarp yield,
steady yielding character and resistance against insect pests and competitor
weed moulds. In the chemical mutation, one mutant having small sporocarp
with long stipe and other mutant having sporocarp with very few spores have
been developed. In hybridization, one hybrid was developed by pairing
compatible mono spore cultures of two different species of Pleurotus which
have got maximum desirable characters among the developed hybrids. Cultural
characters of the selected isolates were studied and the effect of coconut milk
in enhancing mycelial growth were proved. Periodical observatiori of the
incidence of insect pests and competitor weed moulds in the mutants, hybrids
and native isolates have been worked out. Studies on quality parameters and
consumer acceptability have proved that the native isolates were comparatively
better to the other species of Pleurotus obtained from various mushroom
research centres of the country. Organoleptic studies of selected hybrids and
mutants have been proved that they have better acceptability in the market as
compared to the standard species, Pleurotus sajor-caju.
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