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Pisum Genetics Association | PISUM GENETICS |
Published by PGA since 1969 |
| Volume 24, 1992 |
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Pisum Genetics |
Volume 24 |
1992 |
Contents |
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TABLE OF CONTENTS |
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Preface........................................................................................................................... |
1 |
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Review |
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The symbiosis genes of pea. |
5 |
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Research Reports |
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A new allele, stbs,
at the St locus. |
13 |
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A new ramosus gene on
chromosome 5. |
14 |
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A second gene for leaf edge
necrosis, len-2, located on chromosome 5. |
16 |
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Branching in Pisum:
inheritance and allelism tests with 17 ramosus mutants. |
17 |
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The genetic basis of early
flowering in mutant line I/178. |
32 |
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The neoplastic pod gene (Np) may be a factor for resistance in pea to the pest Bruchus pisorum L. V.A. Berdnikov, Y.A. Trusov, V.S. Bogdanova, O.E. Kosterin, S.M. Rozov, S.V. Nedel'kina and Y.N. Nikulina.............................................................. |
37 |
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Manifestation of the Lf
locus in tissue culture of pea. |
40 |
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Evidence supporting the revision and integration of the pea chromosome 7 linkage map. K.M. Folta and N.O. Polans................................................................................... |
44 |
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Twisted tendrils (Twt) - a phenotype associated with a translocation involving chromosome 1. F.L. Gorel, S.V. Temnykh, I.P. Lebedeva and V.A. Berdnikov........................... |
48 |
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Linkage relationship between
genes Fw and Fnw. |
52 |
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Linkage of Td with
markers on linkage group III of peas. |
54 |
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Mapping of the third locus for
histone H1 genes in peas. |
56 |
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Two waxless mutants of
somaclonal origin in pea. |
60 |
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Internode length in Pisum: phenotypic characterisation and genetic identity of the short internode mutant Wt11242. J. Kusnadi, M..Gregory, I.C.Murfet, J.J. Ross and F. Bourne................................................................................................................... |
64 |
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Expression of det
(determinate) in genotypes Lfd,
Lf, lf and lfa.
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75 |
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The mapping of Pea-2 supports the assignment of Vc-5 and rb to a specific region of chromosome 3. N.O. Polans and K.M. Folta.......................................................... |
79 |
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coch
and het are allelic. |
82 |
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Internode length in Pisum.
Interaction of genes lhi, la and crys. |
83 |
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Internode length in Pisum.
Two further lv mutants. |
86 |
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Forum |
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Correction to the description of the expression of the 'bipartitus' (bip) gene in some of the published literature. F.N. Green, P.W. Winfield and M.J. Ambrose.......................... |
90 |
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The pea map - comments from a frustrated Mendelian geneticist N.F. Weeden.................. |
91 |
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Germplasm |
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Pisum Genetics Stocks Centre. M. Ambrose and S. Blixt.................................................. |
92 |
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Wt10745, a line with genotype Pur pu. S. Apisitwanich and W.K. Swiecicki.................... |
92 |
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New Variety................................................................................................................... |
92 |
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Cover
Berdnikov et al (pp 37-39 this issue) conclude that the dominant gene for neoplastic pods, Np, may confer a measure of resistance to pea weevil (Bruchus pisorum L.), a common pest of garden pea. Pods with allele Np form pustule-like outgrowths under certain environmental conditions as a result of proliferation of the epidermal cells (Dodds and Matthews, 1966; Nuttal and Lyall, 1964). Similar outgrowths also form in response to Bruchus ovipositions (Vasilev, 1939). Berdnikov et al found that 6-8 days after oviposition, these outgrowths underwent necrosis and eventually fell away removing any unhatched eggs. However, the majority of the larvae managed to hatch earlier and penetrate the pods. Thus the strategy appeared not to be a very effective defence. Nevertheless, they found a high concentration of the Np allele among accessions from regions where pressure from the pest was high.
The cover photo (Berdnikov et al, Fig. 1) shows a purple pod of genotype Np/np with two bands of white, pustule-like outgrowths formed in response to application, through a glass capillary, of a 0.9% NaCl solution containing the homogenised remains of a Bruchus individual (black arrow). NaCl solution without the Bruchus homogenate (white arrow) failed to evoke this response. Pods lacking the Np allele did not respond to the Bruchus homogenate.
