Crops under rainfed cultivation
M. Moatamedi; E. Bazgir; M. Nasr Esfahani; M. Darvishnia
Volume 6, Issue 2 , January 2018, , Pages 187-208
Abstract
Cereal Cyst nematode is one of the most important damaging nematodes of wheat and barley in the world. Cereal cyst nematode Heterodera filipjevi has wider distribution in cereal fields in the country. In this study, the effect of mentioned nematode was evaluated on 13 wheat rainfed cultivars and root ...
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Cereal Cyst nematode is one of the most important damaging nematodes of wheat and barley in the world. Cereal cyst nematode Heterodera filipjevi has wider distribution in cereal fields in the country. In this study, the effect of mentioned nematode was evaluated on 13 wheat rainfed cultivars and root micro-morphological in greenhouse and field condition. H. filipjevi were identified based on morphometric and molecular characters. The number of cysts, second stage juveniles (J2) and eggs, reproductive factors and anatomical aspects of the root were analyzed. The results indicated that at greenhouse conditions, the lowest milky cyst was related to Zagros cultivar with 1.75 number and the lowest number of cereal cyst nematode eggs and larvae and reproductive factors were related to the Kohdasht cultivar with 1.32 and 0.26 number per gram of soil. Obtained results classified cultivars in two ranges of resistant and sensitive to cyst nematode. In the field, the lowest number of cyst was related to Zagros with 185.33 per 200 g of soil. The lowest number of CCN eggs and larvae and reproductive factors were related to Kohdasht with 3.76 and 0.68 per g of soil. Root components studies, the highest thickness of cuticle, periderm and parenchyma was observed for the Rasad, Karim and Rasad cultivars with an average of 12, 33 and 41.33 micrometers and the lowest was recorded for Karim, Rizhav and Aftab with an average of 6.67, 19.33 and 23 μm, respectively. Cluster analysis was also divided the studied cultivars in two different categories, which this results had a remarkable similarities with Duncan's test results.
