TABLE OF CONTENTS

Page

Linkage Map

Cover

Preface

1

Review

Winterhardiness of pea. G.A. Murray and J.B. Swensen

4

Research Reports

Supplemental mapping of the gene Chi-32 on chromosome 3.
St. Czerwinska and B. Wolko

14

Early flowering mutants Wt11790 and Wt11791 result from mutation at the Lf locus.
I.C. Murfet

16

Differences in flowering behaviour between Ranny Zeleny and regenerant lines developed from callus culture are attributable to variation at the Lf and Sn loci.
I.C. Murfet and T.A. Ezhova

19

Chromosomal distribution of genes for resistance to seven potyviruses in Pisum sativum.
R. Provvidenti and R.O. Hampton

26

Intsrnode length in Pisum: le⁵⁸³⁹ is a less severe allele than Mendel's le.
J.J. Ross

29

K219, an early flowering mutant with neutral reaction to photoperiod.
K.K. Sidorova and L.P. Uzhintseva

35

Brown leaf spots (bls): a new gene on chromosome 6.
W.K. Swiecicki

38

Additional mapping data for lum-2 on chromosome 3.
W.K. Swiecicki. and B. Wolko

40

Prx-3 is linked to sbm, the gene conferring resistance to seedbome mosaic virus.
N.F. Weeden, R. Provvidenti and B. Wolko

42

The response to light quality in a yellow-green Pisum mutant.
J. Weller and J.B. Reid

44

Research Report - Germplasm Resources

G-1000 Marx's pea breeding line for multiviral resistance.
R. Provvidenti, R.O. Hampton and F.J. Muehlbauer

50

Germplasm Resources

Transfer of the USDA Pisum Collection from Geneva, NY to Pullman, WA, USA.
J.R. McFerson

53

The Marx Pisum Genetic Stocks Collection.
J.R. McFerson

53

VIR-USSR Pisum Collection and European Pisum database.
K. Leraczyk

54

New Variety

54

Abstract

Genetics of string fonnation in pea pods.
Rebecca J. McGee and J.R. Baggett

55

Gene Symbols

Symbol Pmv for plantago mottle virus resistance changed to Plmv

56