Resistance Evaluation and Postulation of Blackleg in China Oilseed Rape Cultivars

doi:10.7668/hbnxb.2015.04.011

Abstract

Abstract: In order to master the resistance level,we provide a theoretical basis for blackleg resistance breeding and varieties rational distribution.35 cultivars were tested to identify and postulate their resistances to Phoma stem canker using the cotyledons puncture method.No high resistance or immune varieties to Leptosphaeria maculans and Leptosphaeria biglobosa were found in the 35 oilseed rape cultivars.Only three varieties showed low resistance to both Leptosphaeria maculans and Leptosphaeria biglobosa. 35 varieties produced 17 reaction types to 12 strains,totally.Among which,the reaction type of 12 varieties were same with the differential hosts,the reaction type of 18 varieties were very similar to the differential hosts,the reaction type of 5 varieties were unlike any differential hosts.Based on the genetic postulate method,we postulated that the twelve genes known blackleg resistance(Rlm1-9, LepR1-3)were mainly in form of combinations in thirty cultivars,these main oilseed rape cultivars may carry the known or other new resistance genes.So,some genetic resources in our rape germplasm could be used potentially to modify the resistance to Phoma stem canker.

Key words: Oilseed rape, Phoma stem canker, Resistance evaluation, Resistance gene postulation

CLC Number:

S432.2+1

SONG Pei-ling, Malgorzata Jedryczka, HAO Li-fen, HUANGFU Hai-yan, LI Zi-qin, BAO Yu-ying. Resistance Evaluation and Postulation of Blackleg in China Oilseed Rape Cultivars[J]. ACTA AGRICULTURAE BOREALI-SINICA, 2015, 30(4): 59-65. doi: 10.7668/hbnxb.2015.04.011.

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