Characterization of type and genetic diversity among soybean cyst nematode differentiators

Authors

  • Éder Matsuo UFV; CCA; Depto. de Fitotecnia
  • Tuneo Sediyama UFV; CCA; Depto. de Fitotecnia
  • Rosângela D'Arc de Lima Oliveira UFV; CCA; Depto. de Fitopatologia
  • Cosme Damião Cruz UFV; CCB; Depto. de Biologia Geral
  • Rita de Cássia Teixeira Oliveira Bacuri Pesquisa e Melhoramento

DOI:

https://doi.org/10.1590/S0103-90162012000200010

Keywords:

Glycine max, Heterodera glycines, soybean breeding, resistant cultivars

Abstract

The development of soybean cyst nematode, Heterodera glycines Ichinohe, resistant genotypes with high yields has been one of the objectives of soybean (Glycine max (L.) Merrill) breeding programs. The objective of this study was to characterize the pathotype of soybean cyst nematodes and analyze the genetic diversity of ten differentiator lines ('Lee 74', Peking, Pickett, PI 88788, PI 90763, PI 437654, PI 209332, PI 89772, PI 548316 and 'Hartwig'). Inoculum was obtained from plants cultivated in field soil in Viçosa, state of Minas Gerais, Brazil. Thirty-four days after inoculating each plant with 4,000 eggs, the number of females, female index, total number of eggs, number of eggs per female, reproduction factor, plant height, number of nodes, fresh and dry matter weights were assessed. The differential lines were first grouped with Scott-Knott test. Subsequently, the genetic diversity was evaluated using dendrograms, graphic analysis and the Tocher grouping method. The inoculum of H. glycines obtained from NBSGBP-UFV was characterized as HG Type 0. The differentiating lines were divergent, and PI 89772, PI 437654, 'Hartwig' and 'Peking' had the greatest potential for use in breeding programs.

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Published

2012-04-01

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How to Cite

Characterization of type and genetic diversity among soybean cyst nematode differentiators . (2012). Scientia Agricola, 69(2), 147-151. https://doi.org/10.1590/S0103-90162012000200010