Papaya genome analysis for disease resistance genes and molecular markers in Carica papaya and wild relative: Vasconcellea goudotiana
Carica papaya is challenged by a wide range of pests and pathogens that diminish fruit yield and marketability. Today, heterologous transformation and interspecific and intergeneric hybridization are used to improve disease resistance. Transgenes and the introgression of resistance from papaya cultivars and its wild relatives have been used to control several strains of Papaya ringspot virus (PRSV) as well as other pathogens, such as Phytophtora palmivora. Expansions of these sources of resistance are needed to ensure that modern cultivars evolve with microbial populations. The papaya genome sequence is available and can be used to provide markers to identify and isolate R-genes from C. papaya and related species. The emergence of new diseases and movement of pathogens suggests that extending resistance durability will require a comprehensive strategy of integrating genetic resistance, cultural practices, and factors including innate protection provided by beneficial plant-microbe interactions. In this paper, the current status of papaya genome analysis for disease resistance genes and molecular markers from C. papaya and wild relative, Vasconcellea goudotiana are presented. Strategies of developing and coordinating the use papayaRSQUOs disease resistance resources are discussed to ensure that this species continues to provide a valuable source of nutrition for the worldRSQUOs tropical and subtropical regions.
Zhu, Y.J. and Jia, R. (2016). Papaya genome analysis for disease resistance genes and molecular markers in Carica papaya and wild relative: Vasconcellea goudotiana. Acta Hortic. 1111, 1-6
Papaya ringspot virus, Phytophthora palmivora, nucleotide-binding site-leucine rich repeats, R-genes, molecular marker, AFLP