Heterogeneous nature of a 'new' pathotype of Melampsora rust on Salix revealed by AFLP

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	Heterogeneous nature of a 'new' pathotype of Melampsora rust on Salix revealed by AFLP
	Pei, MH; Yuan, ZW; Hunter, T; Ruiz, C; Pei, MH, Univ Bristol, Dept Agr Sci, IACR, Long Ashton Res Stn, Bristol BS41 9AF, Avon, England
刊名	EUROPEAN JOURNAL OF PLANT PATHOLOGY
	2000
卷号	106 期号:8 页码:771-779
关键词	Pathotype Shannon Index Multiple Sources
ISSN号	0929-1873
英文摘要	An outbreak of rust on Salix x mollissima (S. triandra x S. viminalis) 'Q83', an important biomass willow, was first observed at several locations in the UK in 1992. Rust collections obtained from 'Q83' in 1992 at Long Ashton (south west England), Markington (Northern England) and Loughgall (Northern Ireland), were tested for pathogenicity and examined using amplified fragment length polymorphism (AFLP). All collections showed the same pathogenicity patterns on the eight willow differentials and were assigned to f.sp. larici-epitea typica of Melampsora epitea. A total of 304 AFLP markers was scored for 54 rust isolates, 20 from Long Ashton, 20 from Markington and 14 from Loughgall. Cluster analysis placed the isolates into three distinct groups according to the collection sites. Within each site, Markington isolates were least variable, Nei & Li's similarity coefficients averaging 0.996. Average similarities within isolates from Long Ashton and Loughgall were 0.899 and 0.883, respectively. Average per-locus diversity within site (H-j'), calculated using Shannon information index, was 0.014 in Markington, 0.24 in Long Ashton and 0.23 in Loughgall population. Most diversity (69.1%) was partitioned between populations. An analysis of molecular variance (AMOVA) attributed 85.8% of variance to between populations and 14.2% to the individuals within populations. The results suggest that, in 1992, this previously unknown pathotype was not spread from a common source but from separate sources. The AFLP analysis and early records on the host range of M. epitea indicate that the rust virulent to S. x mollissima may have existed in nature before 1992.
学科主题	Agronomy ; Plant Sciences ; Horticulture
语种	英语
WOS记录号	WOS:000165474600007
公开日期	2011-09-23
内容类型	期刊论文
源URL	[http://210.72.129.5/handle/321005/55553]
专题	沈阳应用生态研究所_沈阳应用生态研究所
通讯作者	Pei, MH, Univ Bristol, Dept Agr Sci, IACR, Long Ashton Res Stn, Bristol BS41 9AF, Avon, England
推荐引用方式 GB/T 7714	Pei, MH,Yuan, ZW,Hunter, T,et al. Heterogeneous nature of a 'new' pathotype of Melampsora rust on Salix revealed by AFLP[J]. EUROPEAN JOURNAL OF PLANT PATHOLOGY,2000,106(8):771-779.
APA	Pei, MH,Yuan, ZW,Hunter, T,Ruiz, C,&Pei, MH, Univ Bristol, Dept Agr Sci, IACR, Long Ashton Res Stn, Bristol BS41 9AF, Avon, England.(2000).Heterogeneous nature of a 'new' pathotype of Melampsora rust on Salix revealed by AFLP.EUROPEAN JOURNAL OF PLANT PATHOLOGY,106(8),771-779.
MLA	Pei, MH,et al."Heterogeneous nature of a 'new' pathotype of Melampsora rust on Salix revealed by AFLP".EUROPEAN JOURNAL OF PLANT PATHOLOGY 106.8(2000):771-779.