| phylogenetic relationships among selected heteroderoidea based on 18s and its ribosomal dna. | in a study of relationships among selected cyst-forming and noncyst-forming species of heteroderoidea, combined sequences comprised of dna from part of the conserved 18s ribosomal rna gene (rdna) plus the complete its rdna segment were more similar to analyses based on the its data alone than to analyses based on the 18s data alone. one of the two noncyst-forming species, ekphymatodera thomasoni, grouped with cyst-forming species of heteroderoidea. bilobodera flexa, also a noncyst-forming specie ... | 2004 | 19262808 |
| phylogenetic relationships based on ribosomal dna data for four species of cyst nematodes from italy and one from syria. | phylogenetic analysis of new ribosomal dna (rdna) data for heterodera mediterranea, h. hordecalis, h. carotae, and h. fici from italy and h. ciceri from syria, along with published data for other species, showed high bootstrap support for the following relationships: (((((h. carotae h. cruciferae) h. goettingiana) (((h. trifolii h. ciceri) h. mediterranea) ((h. avenae h. latipons) h. fici))) (cactodera betulae h. hordecalis)) (globodera rostochiensis g. pallida)). the rdna sequence data were for ... | 2001 | 19265879 |
| characteristics and efficacy of a sterile hyphomycete (arf18), a new biocontrol agent for heterodera glycines and other nematodes. | a filamentous, nonsporulating fungus, designated arkansas fungus 18 (arf18), was isolated from 9 of 95 populations of heterodera glycines, the soybean cyst nematode, in arkansas. in petri dishes, arf18 parasitized 89% of h. glycines eggs in cysts. the fungus also infected eggs of meloidogyne incognita and eggs in cysts of cactodera betulae, h. graminophila, h. lespedezae, h. leuceilyma, h. schachtii, and h. trifolii. in pot tests, reproduction of scn was 70% less in untreated field soil that was ... | 1991 | 19283127 |