摘要
Apple scab caused by Venturia inaequalis has a tendency to spread and threatens the development of apple production in recent years in China.The genetic diversity and population structure were investigated by using simple sequence repeat(SSR) markers.51 strains were classified into 3 groups by UPGMA method as Xunyi,Xingping and U.K.population,each of them mainly including strains from its original place.A relatively high level of genetic diversity was revealed: H=0.425 3,I=0.675 8,PPL=66.67%(at species level);H=0.149 1,I=0.228 0,PPL=44.44%(at population level).A high level of genetic differentiation was detected among/within populations with Nei’s Gst analysis and AMOVA.Molecular genetic variance within populations was greater than that among populations.Genetic variance among populations might result from barriers to gene flow(Nm=0.675 8).Genetic variance within populations might result from sexual pro-pagation of V.inaequalis.
Apple scab caused by Venturia inaequalis has a tendency to spread and threatens the development of apple production in recent years in China. The genetic diversity and population structure were investigated by using simple sequence repeat （SSR） markers. 51 strains were classified into 3 groups by UPGMA method as Xunyi, Xingping and U. K. population, each of them mainly including strains from its original place. A relatively high level of genetic diversity was revealed： H =0.425 3, I = 0.675 8, PPL = 66.67% （at species level） ; H =0. 149 1, I =0. 228 0, PPL =44.44% （ at population level）. A high level of genetic differentia- tion was detected among/within populations with Nei＇ s Gst analysis and AMOVA. Molecular genetic variance within populations was greater than that among populations. Genetic variance among populations might result from barriers to gene flow （Nm =0. 675 8）. Genetic variance within populations might result from sexual propagation of V. inaequalis.
出处
《植物病理学报》
CAS
CSCD
北大核心
2008年第3期329-332,共4页
Acta Phytopathologica Sinica
基金
欧盟科技合作项目(ICA4-CT-2001-10001)
教育部长江学者和创新团队发展计划资助项目(200558)
西北农林科技大学优秀人才资助项目(04ZR018)
