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Minnesota 494-All Pea Germplasm1

Thomas H. King, David W. Davis, M. A. Shehata, F. L. Pfleger

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Abstract

Abstract Minnesota 494-A11 is a unique source of common pea ( Pisum sativum L.) germ-plasm. It has moderate to high resistance to common root rot caused by Aphanomyees euteiehes Drechs . (3, 6) and high resistance to fusarium wilt races 1, 2 and 6 caused by Fusarium oxysporum Linford f. sp. pisi Snyd. & Hans. It is intermediate in reaction to race 5 of that organism (7). It also has moderate tolerance to fusarium root rot caused by Fusarium solani and to root rot caused by Pythium ultimum . However, it does not have resistance to Rhizoctonia solani . No other genotype of P. sativum is known to have the above combination of resistanee/tolerance to so many soil-borne pathogens.

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Abstract Minnesota 494-A11 is a unique source of common pea ( Pisum sativum L.) germ-plasm. It has moderate to high resistance to common root rot caused by Aphanomyees euteiehes Drechs . (3, 6) and high resistance to fusarium wilt races 1, 2 and 6 caused by Fusarium oxysporum Linford f. sp. pisi Snyd. & Hans. It is intermediate in reaction to race 5 of that organism (7). It also has moderate tolerance to fusarium root rot caused by Fusarium solani and to root rot caused by Pythium ultimum . However, it does not have resistance to Rhizoctonia solani . No other genotype of P. sativum is known to have the above combination of resistanee/tolerance to so many soil-borne pathogens.

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Abstract Minnesota 494-A11 is a unique source of common pea ( Pisum sativum L.) germ-plasm. It has moderate to high resistance to common root rot caused by Aphanomyees euteiehes Drechs . (3, 6) and high resistance to fusarium wilt races 1, 2 and 6 caused by Fusarium oxysporum Linford f. sp. pisi Snyd. & Hans. It is intermediate in reaction to race 5 of that organism (7). It also has moderate tolerance to fusarium root rot caused by Fusarium solani and to root rot caused by Pythium ultimum . However, it does not have resistance to Rhizoctonia solani . No other genotype of P. sativum is known to have the above combination of resistanee/tolerance to so many soil-borne pathogens.

Key concepts: Root rot, Sativum, Biology, Pythium ultimum, Rhizoctonia solani, Fusarium oxysporum, Fusarium solani, Pisum

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