中国水稻科学
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  2005, Vol. 19 Issue (3): 288-290     DOI:
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Study on Asexual Recombination in Magnaporthe grisea by Using Nitrate Non-Utilizing (nit) Mutants and Fungicide-Resistance as Independent Genetic Markers
ZHANG Chuan-qing , ZHOU Ming-guo
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Abstract Genetics of kitazin P resistance in asexual recombination of Magnaporthe griseawas studied by using nitrate non-utilizing (nit) mutants. Asexual recombinants were detected in all the three pairings, namely DY2-3(nit1-LR)×A7-3(nitM-S),A7-3(nitM-S)×F4-2(nit1-MR), and F4-2(nit1-MR)×DY2-4(nitA-LR). The frequencies of the asexual recombinations were 7.31%, 14.00% and 8.63%, respectively. Most of recombinants had satisfied growth, spore production and pathogenicity ability, indicating that asexual recombinants had high fitness. These results suggested that asexual recombination caused by hyphal fusion might play an important role in the development of fungicide resistant population in M. grisea.
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ZHANG Chuan-qing
ZHOU Ming-guo
Key wordsMagnaporthe grisea   kitazin P resistance   asexual recombination   nitrate non-utilizing mutants   fitness     
Received: 1900-01-01;
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ZHANG Chuan-qing ,ZHOU Ming-guo. Study on Asexual Recombination in Magnaporthe grisea by Using Nitrate Non-Utilizing (nit) Mutants and Fungicide-Resistance as Independent Genetic Markers [J]. , 2005, 19(3): 288-290 .
 
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