Plant Breeding (2021) 140, 320-330

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Mokkaraj Jegadeeswaran, Palchamy Kadirvel, Potukuchi Satya Srinivas, Senapathy Senthilvel, Velu Mani Selvaraj, Shaik Mobeen, Yarabapani Rushwanth Reddy, Betha Usha Kiran and Nidamarty Mukta (2021)
Genetic mapping reveals a major QTL associated with tolerance to the aphid, Uroleucon compositae (Theobald) in safflower (Carthamus tinctorius)
Plant Breeding 140 (2), 320-330
Abstract: Host plant resistance is an effective means of managing aphid pests in safflower but its genetic basis is not known. In this study, F1 and F6-recombinant inbred lines (RILs) produced from the CO-1 × EC-523368-2 cross were phenotyped for tolerance to the aphid, Uroleucon compositae based on days-to-wilt (DW) after infestation. The F1 plants showed the dominance effect and RILs exhibited quantitative variation. The RIL population was genotyped with 242 simple sequence repeat (SSR) markers, which included a set of 150 new SSRs designed through next-generation sequencing and bioinformatics approaches. Two quantitative trait loci (QTLs), QUc-Ct3.1 and QUc-Ct5.1, putatively associated with DW after aphid infestation were detected. QUc-Ct3.1 was a major QTL located on linkage group (LG) 3 with the closest marker SafM-290 (LOD = 18.3), which explained 31.5% of the phenotypic variation. QUc-Ct5.1 was a minor QTL located on LG-5 with the closest marker CtDES-237 (LOD = 7.0), which explained 9.1% of the phenotypic variation. This is the first report and a significant lead towards discovering genes for tolerance to aphids in safflower.
(The abstract is excluded from the Creative Commons licence and has been copied with permission by the publisher.)
Link to article at publishers website


Research topic(s) for pests/diseases/weeds:
resistance/tolerance/defence of host


Pest and/or beneficial records:

Beneficial Pest/Disease/Weed Crop/Product Country Quarant.


Uroleucon compositae Safflower (Carthamus tinctorius) India