Inheritance and Linkage Studies with Five Isozyme Loci in Soybean 1

Crop Science ◽  
1987 ◽  
Vol 27 (5) ◽  
pp. 885-892 ◽  
Author(s):  
Jeffrey Griffin ◽  
Reid G. Palmer
Keyword(s):  
Linkage Studies ◽  
Isozyme Loci

scholarly journals Flavonoid-Deficient Mutants in Grass Pea (Lathyrus sativusL.): Genetic Control, Linkage Relationships, and Mapping with Aconitase and S-Nitrosoglutathione Reductase Isozyme Loci

2012 ◽  
Vol 2012 ◽  
pp. 1-11 ◽  
Author(s):  
Dibyendu Talukdar
Keyword(s):  
Genetic Analysis ◽  
Extra Chromosome ◽  
Recessive Inheritance ◽  
Linkage Studies ◽  
Grass Pea ◽  
Flavonoid Content ◽  
Banding Patterns ◽  
Trisomic Analysis ◽  
Isozyme Loci ◽  
Linkage Relationships

Two flavonoid-deficient mutants, designated asfldL-1andfldL-2, were isolated in EMS-mutagenized (0.15%, 10 h) M2progeny of grass pea (Lathyrus sativusL.). Both the mutants contained total leaf flavonoid content only 20% of their mother varieties. Genetic analysis revealed monogenic recessive inheritance of the trait, controlled by two different nonallelic loci. The two mutants differed significantly in banding patterns of leaf aconitase (ACO) and S-nitrosoglutathione reductase (GSNOR) isozymes, possessing unique bands inAco 1, Aco 2,andGsnor 2loci. Isozyme loci inherited monogenically showing codominant expression in F2(1 : 2 : 1) and backcross (1 : 1) segregations. Linkage studies and primary trisomic analysis mappedAco 1andfld 1loci on extra chromosome of trisomic-I andAco 2,fld 2,andGsnor 2on extra chromosome of trisomic-IV in linked associations.

scholarly journals Inheritance and Linkage Relationships of Melon (Cucumis melo L.) Isozymes

1998 ◽  
Vol 123 (2) ◽  
pp. 264-272 ◽  
Author(s):  
Jack E. Staub ◽  
Vladimir Meglic ◽  
James D. McCreight
Keyword(s):  
Cucumis Melo ◽  
Linkage Studies ◽  
Genomic Information ◽  
Linkage Groups ◽  
Map Construction ◽  
Segregation Ratios ◽  
Isozyme Loci ◽  
Cucumis Melo L ◽  
Linkage Relationships ◽  
Linkage Distance

Nineteen polymorphic and eleven monomorphic isozyme loci were identified in thirteen enzyme systems in a survey of four-hundred melon (Cucumis melo L.) accessions. Segregation of allozymes in F2 and backcross (BC) families for isozyme loci agreed with the expected 1:2:1 and 1:1 segregation ratios (P <0.01). Eleven isozyme loci were linked and were integrated to form a map containing two linkage groups spanning 98 cM with a mean linkage distance of ≈9 cM. Linkage groups (A and B) contain the following loci in the order: A Fdp-2, Pgd, Pgm, Mpi-1, Idh, and Ac, and B Pep-gl, Mdh-2, Mdh-4, Mdh-5, Mdh-6. The remaining eight loci (Acp-1, Acp-4, Ak-4, Fdp-1, Gpi, Mpi-2, Pep-la, and Pep-pap) segregated independently. The isozyme map constructed in this study provides genomic information for future linkage studies with economically important traits and concensus map construction through map merging.

Identification of microsatellite markers near the human genes encoding the beta-cell ATP-sensitive K+ channel and linkage studies with NIDDM in Japanese

Diabetes ◽  
1996 ◽  
Vol 45 (2) ◽  
pp. 267-269 ◽  
Author(s):  
N. Iwasaki ◽  
M. Kawamura ◽  
K. Yamagata ◽  
N. J. Cox ◽  
S. Karibe ◽  
...  
Keyword(s):  
Beta Cell ◽  
Microsatellite Markers ◽  
K Channel ◽  
Linkage Studies ◽  
Human Genes ◽  
Genes Encoding

Linkage studies of NIDDM with 23 chromosome 11 markers in a sample of whites of northern European descent

Diabetes ◽  
1996 ◽  
Vol 45 (3) ◽  
pp. 370-375 ◽  
Author(s):  
S. C. Elbein ◽  
K. L. Bragg ◽  
M. D. Hoffman ◽  
R. A. Mayorga ◽  
M. F. Leppert
Keyword(s):  
Linkage Studies ◽  
Chromosome 11 ◽  
European Descent ◽  
Northern European

Genetic Analysis of Chinese Cucumber Collections in the U.S. National Germplasm Collection

HortScience ◽  
1998 ◽  
Vol 33 (3) ◽  
pp. 534e-534 ◽  
Author(s):  
J. Staub ◽  
Felix Sequen ◽  
Tom Horejsi ◽  
Jin Feng Chen
Keyword(s):  
Genetic Diversity ◽  
Principal Component Analysis ◽  
Genetic Variation ◽  
Genetic Analysis ◽  
Allelic Variation ◽  
Germplasm Collection ◽  
Principal Component ◽  
Isozyme Loci ◽  
National Plant Germplasm System ◽  
The U.S

Genetic variation in cucumber accessions from China was assessed by examining variation at 21 polymorphic isozyme loci. Principal component analysis of allelic variation allowed for the depiction of two distinct groupings of Chinese accessions collected in 1994 and 1996 (67 accessions). Six isozyme loci (Gpi, Gr, Mdh-2, Mpi-2, Pep-gl, and Pep-la) were important in elucidating these major groups. These groupings were different from a single grouping of Chinese 146 accessions acquired before 1994. Allelic variation in Chinese accessions allowed for comparisons with other accessions in the U.S. National Plant Germplasm System (U.S. NPGS) collection grouped by continent and sub-continent. When Chinese accessions taken collectively were compared with an array of 853 C. sativus U.S. NPGS accessions examined previously, relationships differed between accessions grouped by country or subcontinent. Data indicate that acquisition of additional Chinese and Indian cucumber accessions would be strategically important for increasing genetic diversity in the U.S. NPGS cucumber collection.

Morph-Specific Proteins in Pollen and Styles of Distylous Turnera (Turneraceae)

Genetics ◽  
1997 ◽  
Vol 146 (2) ◽  
pp. 669-679
Author(s):  
Andreas Athanasiou ◽  
Joel S Shore
Keyword(s):  
Isoelectric Focusing ◽  
Isozyme Markers ◽  
Unlinked Locus ◽  
Full Expression ◽  
Isoelectric Points ◽  
Isozyme Loci ◽  
Specific Proteins ◽  
S Allele

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

Genetic Predispositions, Prophylactic Treatments and Private Health Insurance: Nothing is Better Than a Good Pair of Genes

1997 ◽  
Vol 23 (1) ◽  
pp. 45-68 ◽  
Author(s):  
Alexandra K. Glazier
Keyword(s):  
Health Care ◽  
Health Care Providers ◽  
Genetic Predisposition ◽  
Genetic Linkage ◽  
Dna Analysis ◽  
Care Delivery ◽  
Medical Community ◽  
Care Providers ◽  
Linkage Studies ◽  
Prophylactic Measures

Discovering the genetic basis of a particular disease is not only of great interest to the medical community; private health insurers are also anxiously awaiting the results of genetic linkage studies. Apart from the scientific value of DNA studies, the results of genetic linkage research are relevant to health care delivery in two principal ways. First, identifying the genetic origin of a disease may allow doctors to detect the disease earlier. If doctors know that an individual is genetically predisposed to a particular disease, then health care providers can increase screening efforts and watch for early symptoms. Second, if an individual has a genetic predisposition to a particular disease, health care providers may employ preventive or “prophylactic" measures to reduce or eliminate the risk of developing the disease or condition to which the individual is genetically predisposed. Genetic linkage studies will soon allow more individuals to learn of their own genetic predispositions to certain diseases. Currently genetic predisposition tests (both pedigrees of family history and DNA analysis) can indicate that an individual is at high risk for developing a disease.

scholarly journals LINKAGE STUDIES IN BARLEY

Genetics ◽  
1929 ◽  
Vol 14 (2) ◽  
pp. 222-222
Author(s):  
D W Robertson
Keyword(s):  
Linkage Studies
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