Evaluation of powdery mildew intensity of sainfion (Onobrychis viciaefolia)  accessions in field conditions

Alizadeh, Mohammad-ali; Jafari, Ali-ashraf

doi:10.22092/ijrfpbgr.2014.7690

Evaluation of powdery mildew intensity of sainfion (Onobrychis viciaefolia) accessions in field conditions

Document Type : Research Paper

Authors

10.22092/ijrfpbgr.2014.7690

Abstract

Fifty six populations of sainfion (Onobrychis viciaefolia) were evaluated for responses to powdery mildew using randomized complete block design at Alborz research station, Iran, during two years. Results showed different degrees of disease severity index among the studied populations. During, 2008, Several populations such as Polycross-Karaj, Oshnaviah, 9262(Karaj), 8199(Tehran), 2399(Karaj), Tehran(3001), Karaj(15353), North-Khorasan(3062), and Chaharmohal(8799) had disease severity index, lower than 25% which were regarded as tolerant to powdery mildew. The disease severity index of several populations such as Ardebil(20520), Karaj(9054), Ahar(20521), Bonab(20357), and Tabriz(2958), were in range between 25-50%, regarded as semi-susceptible. The rest of the populations with disease severity index more than 50%, nominated as susceptible. The evaluations were continued on selected populations for both disease and forage yield during 2009. There was significant differences between the populations for both of the traits for three successive cuttings. Forage yield of Tehran(3001) and Chaharmahal(8799) was higher than means of semi-susceptible and susceptible populations. Results implied that the last two mentioned populations and Oshnaviah could be considered as desired parents for developing synthetic varieties of the species.

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