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Acta Agron Sin ›› 2010, Vol. 36 ›› Issue (08): 1296-1301.doi: 10.3724/SP.J.1006.2010.01296

• CROP GENETICS & BREEDING·GERMPLASM RESOURCES·MOLECULAR GENETICS • Previous Articles     Next Articles

Novel High Oil Germplasm with Resistance to Aspergillus flavus and Bacterial Wilt Developed from Recombinant Inbred Lines

LIAO Bo-Shou,LEI Yong,WANG Sheng-Yu,HUANG Jia-Quan,LIN Xiao-Peng,JIANG Hui-Fang,YAN Li-Ying   

  1. Oil Crops Research Institute of the Chinese Academy of Agricultural Sciences / Key Laboratory of Oil Crop Biology, Ministry of Agriculture, Wuhan 430062, China
  • Received:2010-01-26 Revised:2010-04-18 Online:2010-08-12 Published:2010-06-11

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Abstract: One of the important goals for peanut breeding in China is to enhance the resistance to aflatoxin accumulation and bacterial wilt (Ralstonia solanacearum) as well as to increase the oil content in peanut. In the present study, recombinant inbred lines were constructed with the offspring derived from Yuanza 9120 ´ Zhonghua 5. Yuanza 9120 with average oil content has high resistance to bacterial wilt but no resistance to aflatoxin accumulation; Zhonghua 5 is high yielding, high susceptible to bacterial wilt and not resistant to aflatoxin accumulation. Resistances to aflatoxining and bacterial wilt were identified in F7-10 as well as the oil content and agronomic traits of lines were investigated. The results indicated that resistance to Aspergillus flavus was controlled accumulatively by two linked main genes and other additive genes, and oil content was controlled by two inhibitory main genes as well as other additive genes. There were significant difference for bacterial wilt resistance, resistance to Aspergillus flavus and oil content between the offspring and parents which presented heterobeltiosis. Eighteen high oil content lines with resistance to to Aspergillus flavus or bacterial wilt were obtained, one (J091) of which was resistant both to Aspergillus flavus and bacterial wilt. Analysis of agronomic traits and SSR data indicated that 18 lines were considerably diverse and may be used as potential breeding materials.

Key words: Peanut lines, Resistance to Aspergillus flavus, Bacterial wilt resistance, High oil content, Recombined inbreed lines

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