Studies on false smut resistance genetic in three-line indica hybrid rice
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    Abstract:

    By cross with sterile(A) with resistance to false smut and resistant or susceptible restorer(R),studied the cytoplasmic effects of resistance to false smut of sterile and genetic of false smut resistance of restorer. The results showed that: among the combinations of sterile (R)譺estorer (S), the F1 showed susceptible that A(R)識(S)→F1?S) and not show the cytoplasmic effect, controlled the resistance to false smut of F1 by the restorer and showed the 3 types of dominant, incomplete dominant and recessive of hybrids resistant genetic that RRR 、RRMR and RRS. Dominant, and incomplete dominant frequency accounted for 81.25%. Significantly correlated that the disease panicle rate, disease index ,per panicle disease grains and highest disease grains of the diseasepanicle of F1 with restorer that’s. The correlation coefficient r=0.898**,r=0.868**,r=0.901**,r=0.569**.Hybrid F? and restorer between false smut condition indicators significantly correlated. HA188, HA197, HA198 and R288xuan Etc. the restore new germplasm with resistance to false smut has been breeding and screening. Discussed the hybrid breeding for resistance to false smut .

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History
  • Received:January 17,2013
  • Revised:May 12,2013
  • Adopted:July 09,2013
  • Online: August 08,2013
  • Published:
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