culture extract from mycelium is useful for PCR amplifi-
cation. On melting analysis, melting peak at Tm values of
88.08 and 88.58–89.08C were formed by SD192 and
SD296, respectively (Fig. 1a,b). As expected, electrophoretic
analysis of these PCR products with 30058-S1 extract
showed 144- and 265-bp amplified bands, respectively
(Fig. 1c,d). These findings indicate that SD192 and SD296
can be used in the detection of the sporeless trait from
TMIC-30058 by using real-time PCR and culture extracts.
Determination of sporulation phenotype in the breeding
population by test cross in P. pulmonarius generally
requires at least 60 days containing mating with tester
strains, preparation of the culture seeds, and cultivation to
obtain the mature fruiting bodies. Although the two previously
developed STS markers, SD192 and SD296, solved
the need for these lengthy processes, preparation of purified
genomic DNA and electrophoretic analysis were required.
Here we showed the method combined these STS markers
and real-time PCR without the necessity of purified genomic
DNA and electrophoretic analysis. This method makes
possible the handling of many specimens in a day by one
person. This time- and labor-saving method will be a
valuable tool for efficient MAS under large-scale screening
in the breeding of sporeless cultivars. To our knowledge,
this is the first report of the real-time PCR-based method
for useful mutation traits in mushroom breeding.
Acknowledgments This research was supported in part by the
Japan Society for the Promotion of Science (Grants-in-Aid for Scientific
Research, KibanC 19580004)
culture extract from mycelium is useful for PCR amplifi-cation. On melting analysis, melting peak at Tm values of88.08 and 88.58–89.08C were formed by SD192 andSD296, respectively (Fig. 1a,b). As expected, electrophoreticanalysis of these PCR products with 30058-S1 extractshowed 144- and 265-bp amplified bands, respectively(Fig. 1c,d). These findings indicate that SD192 and SD296can be used in the detection of the sporeless trait fromTMIC-30058 by using real-time PCR and culture extracts.Determination of sporulation phenotype in the breedingpopulation by test cross in P. pulmonarius generallyrequires at least 60 days containing mating with testerstrains, preparation of the culture seeds, and cultivation toobtain the mature fruiting bodies. Although the two previouslydeveloped STS markers, SD192 and SD296, solvedthe need for these lengthy processes, preparation of purifiedgenomic DNA and electrophoretic analysis were required.Here we showed the method combined these STS markersand real-time PCR without the necessity of purified genomicDNA and electrophoretic analysis. This method makespossible the handling of many specimens in a day by oneperson. This time- and labor-saving method will be avaluable tool for efficient MAS under large-scale screeningin the breeding of sporeless cultivars. To our knowledge,this is the first report of the real-time PCR-based methodfor useful mutation traits in mushroom breeding.Acknowledgments This research was supported in part by the
Japan Society for the Promotion of Science (Grants-in-Aid for Scientific
Research, KibanC 19580004)
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