Abstract
Soybean cyst nematode (SCN, Heterodera glycine Ichinohe), southern root-knot nematode [SRKN, Meloidogyne incognita (Kofoid and White) Chitwood] and reniform nematode (RN, Rotylenchulus reniformis Linford and Oliveira) are three important plant–parasitic pests in soybean. Previous study showed that plant introduction (PI) 567516C harbored novel quantitative trait loci (QTL) conferring SCN resistance to soybean. However, QTL underlying resistance to SRKN and RN in PI 567516C remain unknown. The objectives of this study were to identify QTL for resistance to SRKN and RN in PI 567516C. Two hundred and forty-seven F6:9 recombinant inbred lines, derived from a cross between cultivar Magellan and PI 567516C, were evaluated for resistance to SRKN and RN. Two hundred and thirty-eight simple sequence repeats and 687 single nucleotide polymorphism markers were used to construct a genetic linkage map. Three significant QTL associated with resistance to SRKN were mapped on chromosomes (Chrs.) 10, 13 and 17. Two significant QTL associated with resistance to RN were detected on Chrs. 11 and 18. Whole-genome resequencing revealed that there might be Peking-type Rhg1 in PI 567516C. Our study provides useful information to employ PI 567516C in soybean breeding in order to develop new cultivars with resistance to multiple nematodes. Electronic supplementary materialThe online version of this article (doi:10.1007/s11032-015-0330-5) contains supplementary material, which is available to authorized users.
Highlights
Soybean cyst nematode (SCN, Heterodera glycine Ichinohe), southern root-knot nematode [SRKN, Meloidogyne incognita (Kofoid and White) Chitwood] and reniform nematode (RN, Rotylenchulus reniformis Linford and Oliveira) are three important plant–parasitic pests in soybean [Glycine max (L.) Merrill] (Taylor and Sasser 1978; Robbins et al 1994a; Wrather and Koenning 2006)
The value of broad-sense heritability of the reproductive index (RI) after infestation with RN was 0.32, indicating that the error variance rather than genetic variance accounted for a large part of all phenotypic variances
This might be the reason why total phenotypic variation explained by two quantitative trait loci (QTL) for resistance to RN in plant introduction (PI) 567516C was small, only 16.4 % (Table 2)
Summary
Soybean cyst nematode (SCN, Heterodera glycine Ichinohe), southern root-knot nematode [SRKN, Meloidogyne incognita (Kofoid and White) Chitwood] and reniform nematode (RN, Rotylenchulus reniformis Linford and Oliveira) are three important plant–parasitic pests in soybean [Glycine max (L.) Merrill] (Taylor and Sasser 1978; Robbins et al 1994a; Wrather and Koenning 2006). Considerable efforts have been made to identify sources of resistance to SRKN or RN in soybean. Luzzi et al (1987) evaluated 2370 soybean accessions in the USDA-ARS germplasm collection from maturity groups (MG) V, VI, VII and VIII for their resistances to SRKN. Hussey et al (1991) and Harris et al (2003) evaluated 139 soybean cultivars and 608 soybean accessions for resistance to SRKN, respectively. Thirty-nine soybean cultivars and seven soybean accessions were found to be resistant to SRKN (Hussey et al 1991; Harris et al 2003). More sources of resistance to RN had been identified in soybean (Robbins et al 1994a, b; Davis et al 1996; Robbins and Rakes 1996).
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