Resistance Response of Drought and Heat Tolerant Spring Wheat Lines against the Cereal Cyst Nematode, Heterodera filipjevi
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Date
2022
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Journal ISSN
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Publisher
Ankara Üniversitesi
Abstract
Wheat (Triticum aestivum L.) is extremely affected by several abiotic and
biotic stress factors. Drought and/or heat alongside the parasitism of
cereal cyst nematodes of the Heterodera genera can have a combined
destructive impact on wheat. Solely, the cereal cyst nematode species
Heterodera filipjevi can cause wheat yield losses of up to 50%. Several
control measures have been implemented, yet the most economical and
convenient control strategy is the use of resistant hosts. Therefore, the
main aim of this study was to evaluate the resistant response of 257 spring
wheat lines obtained from the International Maize and Wheat
Improvement Centre to Heterodera filipjevi that might contain novel
sources of resistance and be added as genetic resources for future breeding
programs. Also, provide a base for future research to understand the
relationship between nematode resistances and drought and heat
tolerance. The results indicated that 11 wheat lines (4%) and 36 wheat
lines (14%) were resistant and moderately resistant, respectively. High
frequency of susceptible and highly susceptible lines and low frequency
of resistant lines within this set was also recorded. The linear regression
analysis between the number of cysts formed and the resistance response
grouping showed a strong, positive, linear correlation. Log-linear
regression analysis showed that there is a weak positive correlation
between the yield of heat tolerant wheat lines and their resistance to the
cyst nematodes as these lines showed tolerance, while there was a weak
negative correlation of formed cyst nematodes on the yield of drought
tolerant lines. This study was able to add new genetic sources of resistance
to Heterodera filipjevi for upcoming breeding programs
Description
Keywords
Biotic stress