Espiau C, Riviere D, Burdon J J, Gartner S, Daclinat B, Hasan S, Chaboudez P
CSIRO Biological Control Unit, Campus International de Baillarguet, F-34982 Montferrier sur Lez, France, , , , , , FR.
Centre for Plant Biodiversity Research, CSIRO Division of Plant Industry, G.P.O. Box 1600, Canberra, A.C.T. 2601, Australia, , , , , , AU.
Oecologia. 1997 Dec;113(1):133-139. doi: 10.1007/s004420050361.
The resistance structure of a Turkish population of the clonal, apomictic composite Chondrilla juncea and the pathotypic structure of a co-occurring population of its obligate rust pathogen, Puccinia chondrillina, was determined by sequential inoculation of 19 host lines with 15 pathogen isolates each derived from single pustules collected from separate plants among the host population. The resultant matrix of resistant and susceptible reactions provides strong circumstantial evidence for a gene-for-gene interaction. Seven distinct pathotypes were detected in the pathogen population. One of these comprised 53% of the population, a second comprised 13%, while the remaining five pathotypes were each detected only once. The host population was similarly diverse, being composed of eight resistance phenotypes, only two of which were represented by more than one host line. Although C. juncea is apomictic, there was only 58% congruence between host resistance and multi-locus isozyme phenotype categories within this population. Pathotypic phenotypes of 13 other isolates of P. chondrillina collected from ten other Turkish and three more distant populations of C. juncea were markedly different from those found in the population studied in detail. There was no obvious relationship between the degree of geographic separation of pathotypes and their ability to attack particular C. juncea lines in this or three other populations represented by single host lines.
通过用15种病原体分离株依次接种19个宿主系来确定土耳其克隆性无融合生殖复合种节节菜种群的抗性结构及其专性锈病病原体软骨草柄锈菌共生种群的致病型结构，这些病原体分离株均来自宿主种群中不同植株上采集的单个脓疱。由此产生的抗性和感病反应矩阵为基因对基因互作提供了有力的间接证据。在病原体种群中检测到7种不同的致病型。其中一种占种群的53%，第二种占13%，而其余5种致病型每种仅被检测到一次。宿主种群同样具有多样性，由8种抗性表型组成，其中只有两种由不止一个宿主系代表。尽管节节菜是无融合生殖的，但该种群内宿主抗性与多位点同工酶表型类别之间的一致性仅为58%。从其他十个土耳其节节菜种群和另外三个更远的种群中收集的13个软骨草柄锈菌分离株的致病型表型与详细研究的种群中发现的明显不同。在这个或其他三个由单个宿主系代表的种群中，致病型的地理隔离程度与其攻击特定节节菜品系的能力之间没有明显关系。
