Inheritance of resistance to Cercospora leaf spot disease of cowpea
Cercospora leaf spot (CLS) is an important disease affecting cowpea production in Nigeria. This study investigated the inheritance of CLS disease in cowpea under natural epiphytotic field condition involving two CLS resistant parents and a CLS susceptible parent. The result showed that F1 populations involving UAM09-1055-6 × IT99K-573-1-1 and UAM09-1055-6 × IT99K-216-24 were resistant to CLS in the 2 crosses suggesting the presence of gene dominance in the control of the disease.
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Extreme resistance to late blight disease by transferring 3 R genes from wild relatives into African farmer-preferred potato varieties
Three late blight resistance (R) genes from wild potato species were transferred as a stack into the farmer-preferred varieties ‘Tigoni’ and ‘Shangi’ and the transgenics tested. R gene expression analysis in 18 transgenic events showed different transgenic events exhibiting different levels of expression in the three genes. However, that pathogen induction and/or high R gene expression are necessary for extreme resistance when transgenic events bear a stack of three R genes was not observed.
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Response of Selected Kenyan Rice Cultivars to Infection by Root Knot Nematode
Meloidogyne incognita causes huge yield losses in rice which is the third most important cereal crop in Kenya. The aim of this study was to identify M. incognita-resistant rice cultivars from Kenya and relate the responses to known resistance pathways. Results of this study provide an insight on sources of M. incognita resistance in Kenyan rice and forms an interesting starting point for further studies on defense responses of common rice varieties to root knot nematode infection.
Read more: http://tiny.cc/s4u2ez