Novel sources of resistance to root-lesion nematode (Pratylenchus thornei) in a new collection of wild Cicer species (C. reticulatum and C. echinospermum) to improve resistance in cultivated chickpea (C. arietinum)

Reen, Roslyn A. and Mumford, Michael H. and Thompson, John P. (2019) Novel sources of resistance to root-lesion nematode (Pratylenchus thornei) in a new collection of wild Cicer species (C. reticulatum and C. echinospermum) to improve resistance in cultivated chickpea (C. arietinum). Phytopathology, 109. pp. 1270-1279. ISSN 0031-949X


Abstract

Pratylenchus thornei, a nematode species that feeds and reproduces in chickpea (Cicer arietinum) roots is widespread throughout the Mediterranean basin and Indian sub-continent. In Australia it can cause yield losses up to 25% of intolerant chickpea cultivars. Potential for improvement has been hindered by the narrow genetic diversity of cultivated chickpea and a limited world collection of original wild Cicer in the primary gene pool consisting of 18 C. reticulatum and 10 C. echinospermum accessions. Recently, collections of C. reticulatum and C. echinospermum from Turkey have substantially increased the number of accessions. This study evaluated 133 C. reticulatum and 41 C. echinospermum accessions from the new collection for resistance to P. thornei under controlled conditions in repeated glasshouse pot experiments. The aim of the study was to identify accessions with resistance superior to that currently available in Australian germplasm. Both wild Cicer species were found, on average to be more resistant to P. thornei (P < 0.001) than C. arietinum. Combined analyses across years to determine genetic rankings showed 13 (7%) wild accessions were significantly more resistant than the most resistant C. echinospermum reference ILWC 246, while another 40 (23%) accessions were significantly more resistant than the least susceptible Australian chickpea cultivar Seamer. Mean P. thornei population densities differed significantly between collection sites in Turkey and within each of the genetic population groups. The sites, Kayatepe, Baristepe 1, and genetic population groups Ret_A and Ret_F associated with sites Oyali and Baristepe 1 produced the lowest P. thornei population densities. This is the first report assessing the resistance to P. thornei of this new collection which offers novel sources of P. thornei resistance and untapped genetic diversity valuable for international chickpea breeding programs to exploit.


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Item Type: Article (Commonwealth Reporting Category C)
Refereed: Yes
Item Status: Live Archive
Additional Information: Permanent restricted access to Published version, in accordance with the copyright policy of the publisher.
Faculty/School / Institute/Centre: Current - Institute for Life Sciences and the Environment - Centre for Crop Health (24 Mar 2014 -)
Faculty/School / Institute/Centre: Current - Institute for Life Sciences and the Environment - Centre for Crop Health (24 Mar 2014 -)
Date Deposited: 04 Jul 2019 01:52
Last Modified: 05 Jul 2019 04:41
Uncontrolled Keywords: root-lesion nematode, root biomass, wild chickpea, wheat Triticum aestivum
Fields of Research : 07 Agricultural and Veterinary Sciences > 0703 Crop and Pasture Production > 070308 Crop and Pasture Protection (Pests, Diseases and Weeds)
Socio-Economic Objective: B Economic Development > 82 Plant Production and Plant Primary Products > 8205 Winter Grains and Oilseeds > 820503 Grain Legumes
Funding Details:
Identification Number or DOI: 10.1094/PHYTO-02-19-0047-R
URI: http://eprints.usq.edu.au/id/eprint/36590

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