Transformation of Monascus purpureus to hygromycin B resistance with cosmid pMOcosX reduces fertility Kamolnan Lakrod# Chulee Chaisrisook Daniel Z. Skinner*
Albino strain KB20M1 of Monascus purpureus was
genetically transformed to hygromycin B resistance with cosmid
pMOcosX, using biolistic bombardment. Conidia and mycelial
fragments were used as the recipient material and rupture disk
strengths of 6.2 and 9.3 MPa each yielded a transformed isolate
from five bombardments. Southern analysis suggested a single
copy of the cosmid had integrated into each of the transformants.
Both of the independent transformants formed cleistothecia
but ascospore formation was greatly reduced or absent, suggesting
the integration and expression of the genes carried on pMOcosX
interfered with fertilization and/or ascospore formation in
this homothallic fungus. |
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