Evaluation of resistance in Glycine max to Fusarium virguliforme and in perennial Glycine species to Phakopsora pachyrhizi and Heterodera glycines

Herman, Theresa

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https://hdl.handle.net/2142/109454 Copy

Description

Title

Evaluation of resistance in Glycine max to Fusarium virguliforme and in perennial Glycine species to Phakopsora pachyrhizi and Heterodera glycines

Author(s)

Herman, Theresa

Issue Date

2020-12-10

Director of Research (if dissertation) or Advisor (if thesis)

Hartman, Glen L

Committee Member(s)

• Wander, Michelle M
• Mideros, Santiago X
• Miller, Andrew N

Department of Study

Natural Res & Env Sci

Discipline

Natural Res & Env Sciences

Degree Granting Institution

University of Illinois at Urbana-Champaign

Degree Name

M.S.

Degree Level

Thesis

Keyword(s)

• Soybean
• Perennial Glycine species
• Disease resistance
• Sudden death syndrome
• Soybean cyst nematode
• Soybean rust

Abstract

Soybean [Glycine max (L.) Merr.] averages approximately 40% protein and 20% oil and is one of the world’s most important crops. Production of the crop is increasing, especially in less developed countries. Occurrence of diseases and pests affecting soybean have increased as production has expanded from its origin in China to almost 100 countries in 2019. Constraints to production due to diseases and pests have been estimated by FAO to reduce yield by 20 to 40% worldwide. Sudden death syndrome of soybean, soybean rust, and infection by soybean cyst nematode caused by fungal pathogens Fusarium virguliforme and Phakopsora pachyrhizi and the plant-parasitic nematode Heterodera glycines, respectively, are three major yield-limiting problems. Soybean cultivars have a narrow genetic base due to bottlenecks in modern cultivar development. Lack of partially resistant cultivars, in the case of sudden death syndrome, and lack of durable genetic resistance to organisms that have high genetic variability, in the case of soybean rust and cyst nematode, demand efforts to find, understand, and incorporate new sources of resistance into soybean germplasm. The USDA-ARS Soybean Germplasm Collection at the University of Illinois Urbana-Champaign maintains 20,099 soybean accessions, 10,144 of which have not been evaluated for reaction to F. virguliforme, and 1,212 accessions in 19 perennial Glycine species that have not been thoroughly investigated for resistance to diseases or pests affecting soybean, including soybean cyst nematode and soybean rust. This study reports new sources of resistance to these pests in G. max and Glycine species for use in ongoing breeding efforts, and provides material for core collections to use in furthering our understanding of the genetic and molecular nature of resistance in soybean and its wild relatives, and their relationship.

Graduation Semester

2020-12

Type of Resource

Thesis

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Copyright and License Information

Copyright 2020 Theresa Herman

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