Linkage Relationships of Isozyme Markers and Incompatibility Genes in Lolium

Author(s):  
Fred Eickmeyer ◽  
Günter Wricke
Genome ◽  
1990 ◽  
Vol 33 (3) ◽  
pp. 348-359 ◽  
Author(s):  
J. L. Pham ◽  
J. C. Glaszmann ◽  
R. Sano ◽  
P. Barbier ◽  
A. Ghesquière ◽  
...  

Segregations of rice isozymes made it possible to ascertain the genetic control of 13 enzymes by 30 loci. In addition to numerous cases of independence, several linkages were observed. Got-2 and Enp-1 were localized on chromosome 3 and a linkage group composed of Pox-3, Pox-4, and Est-1 was identified. Inconsistencies of recombination rates between linked loci among different crosses were noted. Several cases of distorted segregations and pseudolinkages were recorded. The relationships between these results and the study of genome organization in cultivated rice are discussed.Key words: Oryza, isozyme, genetic analysis, segregation distortion, linkage.


Crop Science ◽  
1995 ◽  
Vol 35 (6) ◽  
pp. 1603-1607 ◽  
Author(s):  
H. W. Ohm ◽  
H. C. Sharma ◽  
F. L. Patterson ◽  
R. H. Ratcliffe ◽  
M. Obanni

Genetics ◽  
1997 ◽  
Vol 146 (2) ◽  
pp. 669-679
Author(s):  
Andreas Athanasiou ◽  
Joel S Shore

We used nondenaturing isoelectric focusing (IEF) in a survey of plants from 11 populations to identify style and pollen proteins unique to the short-styled morph of Turnera scabra, T. subulata and T. krapovickasii. Three protein bands [approximately isoelectric points (pIs) 6.1, 6.3 and 6.5] were found only in styles and stigmas of short-styled plants while two bands (approximately pIs 6.7 and 6.8, M  r 56 and 59 kD) occur only in pollen of short-styled plants. Some of these bands appear very late in development, within 24 hr before flowering. Two isozyme loci were mapped to an 8.7 cM region spanning the distyly locus. Using these isozyme markers we identified progeny exhibiting recombination adjacent to the distyly locus. No recombinants between the distyly locus and the locus or loci controlling the presence of the short-styled morph-specific proteins were obtained. This suggests that the loci encoding these proteins are either extremely tightly linked to the distyly locus and in complete disequilibrium with the S allele or exhibit morph-limited expression. Crosses to a plant showing an unusual style protein phenotype demonstrated that an additional unlinked locus is required for full expression of the style proteins. The function of the morph-specific proteins is unknown


Genetics ◽  
1977 ◽  
Vol 85 (3) ◽  
pp. 417-425
Author(s):  
Carl Frankel ◽  
Albert H Ellingboe

ABSTRACT Forty-eight useful new mutations of S. commune were obtained by mutagenesis with N-methyl-N'-nitro-N-nitrosoguanidine. Their requirements and meiotic linkage relationships to each other and previously mapped areas were investigated. Several of these new mutations were incorporated into diploid strains so that the diploids contained at least one marker on every linkage group. Analysis of somatic recombination in these diploids indicated that each meiotic linkage group corresponded to an independent chromosome.


Hereditas ◽  
2008 ◽  
Vol 111 (2) ◽  
pp. 91-97 ◽  
Author(s):  
ALFRED E. SZMIDT ◽  
OUTI MUONA

Evolution ◽  
1960 ◽  
Vol 14 (2) ◽  
pp. 266-270
Author(s):  
Chana Malogolowkin ◽  
Lee Ehrman

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