Molecular mapping of dominant gene responsible for leaf curl virus resistance in chilli pepper ( Capsicum annuum L.)
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ORIGINAL ARTICLE
Molecular mapping of dominant gene responsible for leaf curl virus resistance in chilli pepper (Capsicum annuum L.) Hament Thakur1 · Salesh Kumar Jindal1 · Abhishek Sharma1 · Major Singh Dhaliwal1 Received: 13 June 2019 / Accepted: 15 March 2020 © King Abdulaziz City for Science and Technology 2020
Abstract A resistant source (S-343) having monogenic dominant resistance to chilli leaf curl virus disease (ChiLCVD) has been identified at Punjab Agricultural University (PAU), Ludhiana. The F2 mapping population of 204 plants was derived from the cross MS-341 (susceptible) × S-343 (resistant) to identify the linked marker with the disease-resistant gene. Out of the 685 single-sequence repeats (SSRs) used, only 160 primers showed parental polymorphism. These 160 polymorphic primers were used for bulk segregant analysis and only eight SSR primers were able to differentiate the resistant and susceptible bulks. The linkage analysis revealed that the two markers CA 516044 and PAU-LC-343-1 were found linked with the disease-resistant gene covering a total distance of 15.7 centimorgan (cM). The two primers CA 516044 and PAU-LC-343-1 were found located on chromosome 6 of the pepper genome at a genetic distance of 6.8 cM and 8.9 cM, respectively, from the resistant gene. The validation of linked markers was performed using 26 resistant and susceptible genotypes developed at PAU, Ludhiana by former researchers. The validation of the primers revealed that there was a correlation between phenotypic and genotypic data of the used genotypes, and these markers can be used for the marker-assisted breeding procedures for transferring ChiLCVD resistance until the gene-based markers will be developed. The markers described in this study are the first-ever molecular markers identified as linked to the ChiLCVD-resistant gene. Keywords Capsicum annuum · Molecular mapping · Leaf curl virus · Dominant gene · Resistance · SSRs
Introduction Chilli pepper is an important crop that belongs to family Solanaceae and comprises about 30 species. It is considered to be originated in tropical and subtropical Americas. Capsicum annuum is the most cultivated and economically important among the five cultivated species. It is grown over a wide range of locations worldwide and includes both sweet and hot peppers. Hot pepper is used as a spice in many parts of the world, and is valued for its sensory attributes of color, pungency, and flavor (Pino et al. 2007).
Electronic supplementary material The online version of this article (https://doi.org/10.1007/s13205-020-02168-7) contains supplementary material, which is available to authorized users. * Hament Thakur [email protected] 1
Department of Vegetable Science, Punjab Agricultural University, Ludhiana 141004, India
A number of pathogens including viruses infect chilli pepper at different stages and causes massive production losses. To date, 75 viruses have been reported including 37 ICTV ratified species and further six ICTV candidate species of begomoviruses were detecte
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