Identification of physiological races of sunflower broomrape in the Republic of Moldova and comparison of pathogenicity with Chinese races
Sunflower broomrape,a parasitic seed plant that infests the roots of sunflowers,severely impacts sunflower production.Breeding resistant varieties is the most effective measure for preventing and controlling the sunflower broomrape.Due to the physiological races differentiation within the sunflower broomrape population,it is crucial to identify the types and distribution of physiological races in different regions for the rational introduction of resistant varieties.In this study,nine samples of sunflower broomrape seeds were collected from the main sunflower-producing areas in the Republic of Moldova,and the physiological races of the nine samples were identified using the internationally recognized hosts as differential hosts.The results indicated that the physiological races of the nine samples can be classified into four different types,including D,E,F,and G.Among them,the F race was the most prevalent,accounting for 44％with four samples,while the G race accounted for 33％with three samples.The D and E races each represented 11％with one sample.Comparison the pathogenicity of the same physiological races collected from Moldova and those from different regions in China demonstrated that,regardless of resistant('JK103')or susceptible('LD5009')variety,the toxicity of the same physiological race in China's sunflower broomrape was significantly higher than that of Moldova's broomrape samples.
NETL
NSTL
万方数据
