Genetic variation in the response of pea (Pisum sativum L.) to high soil concentrations of boron

We assessed genetic variation in stem strength in field pea (Pisum sativum L.) using physical and biological measures in order to develop selection criteria for breeding programs. A diverse group of 6 pea genotypes was subjected to 2 levels of disease (ascochyta leaf and stem blight), high and low. Stem samples were tested for physical stem strength (load at breaking point and flexion) using a universal testing machine. Stem diameter and compressed stem thickness were measured as biological indicators of stem strength. The genotypes varied significantly in physical and biological measures of stem strength, and in resistance to ascochyta blight. Load at breaking point was strongly associated with compressed stem thickness but only weakly associated with stem diameter. Significant variation in compressed stem thickness was present among pea genotypes, supporting this as an inexpensive, reliable, and quantitative measure for use in the field. There was no variation in stem lignin content among genotypes. Ascochyta blight resistance and stem strength, as assessed by load, flexion, or compressed stem thickness, were independent traits (the main effects of disease level and genotype × disease level interactions for load, flexion, and compressed stem thickness were non-significant). Therefore, concurrent genetic gains in both ascochyta resistance and stem strength should be possible in the same pea breeding population.

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Genetic variation in pea (Pisum) dehydrins: sequence elements responsible for length differences between dehydrin alleles and between dehydrin loci in Pisum sativum L.

Theoretical and Applied Genetics ◽

10.1007/s001220050855 ◽

1998 ◽

Vol 96 (8) ◽

pp. 1186-1192 ◽

Cited By ~ 6

Author(s):

E. Grosselindemann ◽

M. Robertson ◽

J. A. Wilmer ◽

P. M. Chandler

Keyword(s):

Genetic Variation ◽

Pisum Sativum ◽

Pisum Sativum L ◽

Sequence Elements

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The purification and characterization of a third storage protein (convicilin) from the seeds of pea (Pisum sativum L.)

Biochemical Journal ◽

10.1042/bj1910509 ◽

1980 ◽

Vol 191 (2) ◽

pp. 509-516 ◽

Cited By ~ 92

Author(s):

R R Croy ◽

J A Gatehouse ◽

M Tyler ◽

D Boulter

Keyword(s):

Genetic Variation ◽

Pisum Sativum ◽

Storage Protein ◽

Purification And Characterization ◽

Native Form ◽

Pisum Sativum L ◽

A Subunit ◽

Cnbr Cleavage ◽

Pea Seeds

A third storage protein, distinct from legumin and vicilin, has been purified from the seeds of pea (Pisum sativum L.). This protein has been named ‘convicilin’ and is present in protein bodies isolated from pea seeds. Convicilin has a subunit mol.wt. of 71 000 and a mol.wt. in its native form of 290 000. Convicilin is antigenically dissimilar to legumin, but gives a reaction of identity with vicilin when tested against antibodies raised against both proteins. However, convicilin contains no vicilin subunits and may be clearly separated from vicilin by non-dissociating techniques. Unlike vicilin, convicilin does not interact with concanavalin A, and contains insignificant amounts of carbohydrates. Limited heterogeneity, as shown by isoelectric focusing, N-terminal analysis, and CNBr cleavage, is present in convicilin isolated from a single pea variety; genetic variation of the protein between pea lines has also been observed.

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