واكنش تعدادي از لاين هاي پيشرفته و ارقام گندم نسبت به عوامل بيماري پوسيدگي معمولي ريشه و طوقه در شرايط مزرعه در استان فارس

Field Reaction of some Wheat Advanced Lines and Cultivars to Common Root and Crown Rot Pathogens in Fars Province

Common root and crown rot, mainly caused by the soil fungi, Bipolaris sorokiniana and Fusarium spp. is a serious problem in some wheat growing areas in Fars province, Iran. Resistance or tolerance is an important control strategy. In a study conducted during 1995-1997, 114 advanced lines and cultivars of wheat (Triticum aestivum L.) were screened in a highly infested field at Bayza district, Fars province for reaction to the disease. Ten lines and cultivars showed considerable field resistance or tolerance. Among these, six yellow rust resistant/tolerant lines or cultivars were selected and compared for yield in a randomized complete block design with four replications established in a highly infested soil at Estahban (moderate) and Ghir-Karzin (warm) regions of the province in 1997-98. Cultivar Marvdasht and line M-75-20 had the highest yields in the moderate and cultivar Chamran in the warm regions of the province (p=1%). Based of these results, cv. Marvdasht is recommended to be planted in the infested fields of the moderate, and cv. Chamran in the warm areas of the province.