Resistance of Iranian landrace wheat to the cereal cyst nematode, Heterodera filipjevi

Abstract

The cereal cyst nematode (CCN), Heterodera filipjevi,has a global distribution and can reduce wheat yields by up to 32 %. Plant genetic resistance can effectively manage H. filipjevi populations, so 31 Iranian wheat landrace accessions were screened for H. filipjevi resistance under greenhouse conditions. PI628144 (syn. AUS28321) was resistant and five other accessions moderately resistant to H. filipjevi and may provide novel CCN-resistance for plant breeders to exploit.

Genetic variation of bread wheat accessions in response to the cereal cyst nematode, Heterodera filipjevi

“…Differential responses in host-nematode pathotype interactions occur in wheat lines carrying different cereal cyst nematode resistance (Cre) genes. Several studies have shown differential reactions of H. filipjevi populations to putative resistant cereal germplasm (Ozarslandan et al, 2010;Toktay et al, 2013;Wu et al, 2016) and, thus, the Cre genes may only confer resistance to some H. filipjevi pathotypes (Yavuzaslanoglu et al, 2016). Cre1, located on chromosome 2B, confers resistance to most European CCN and the sole Australian pathotype, while Cre3, present on chromosome 2D, is highly resistant to the Australian pathotype and susceptible to a number of European pathotypes (Sharma et al, 2013).…”

Identification and Biocontrol Potential of Entomopathogenic Nematodes and Their Endosymbiotic Bacteria in Apple Orchards against the Codling Moth, Cydia pomonella (L.) (Lepidoptera: Tortricidae)

“…However, some studies reported a higher occurrence of H. bacteriophora than S. feltiae from neighboring regions with similar climatic and geographic conditions in Türkiye [61,62]. Although both EPN species have been found in different climatic zones, S. feltiae was more dominant in cold and continental climate conditions, whereas H. bacteriophora was generally isolated in higher frequencies from tropical and subtropical areas [51,63,64]. The diversity and distribution of EPNs are also related to the presence of suitable insect hosts as well as climatic and environmental conditions.…”

Resistance Response of Drought and Heat Tolerant Spring Wheat Lines against the Cereal Cyst Nematode Heterodera filipjevi

“…The study has managed to find 11 resistant and 36 moderately resistant spring wheat lines, noting that the screened wheat set originates from a diverse genetic background. Different screening studies that have been done on wheat accessions originating from different sources have shown resistance to H. filipjevi (Toktay et al 2012;Dababat et al 2014;Pariyar et al 2016a, b;Yavuzaslanoglu et al 2016;Dababat 2019). There is a difficulty to truly compare the result of this study to other similar or related studies despite using the same experimental setup, as there are a lot of variables between the experiments.…”

“…One of the main reasons regarding the difficulty in comparison is due to different categorizing of the resistant response groups that rely on the average number of formed cysts and females on the root system per plant and comparing them to the check wheat cultivars with known resistance response. Pariyar et al (2016b) and Yavuzaslanoglu et al (2016) have used a different arrangement of the average number of formed cysts and females/plant assigned to the resistant groups with reliance on the check wheat cultivars response. Zhang et al (2012) even used a different method of sorting which relied on the relative resistance index (RRI); RRI = [1 -(the mean number of white females per plant on a tested line/the mean number of white females per Wenmai 19 check plant).…”