Association of the NAD(P)H-bispecific nitrate reductase structural gene with the Nar7 locus in barley

Genome ◽  
1995 ◽  
Vol 38 (4) ◽  
pp. 743-746 ◽  
Author(s):  
R. L. Warner ◽  
D. A. Kudrna ◽  
A. Kleinhofs
Keyword(s):  
Restriction Fragment Length Polymorphism ◽  
Nitrate Reductase ◽  
Structural Gene ◽  
Restriction Fragment ◽  
Length Polymorphism ◽  
Fragment Length ◽  
Fragment Length Polymorphism ◽  
Reductase Activity ◽  
Wild Type ◽  
Restriction Fragment Length

The NADH-specific and NAD(P)H-bispecific nitrate reductase genes from barley have been cloned and sequenced. To determine if the Nar7 locus encodes the NAD(P)H-bispecific nitrate reductase structural gene, a cross was made between a wild-type cultivar, Morex (Nar7 Nar7), and Az70 (nar7w nar7w), a mutant from the cultivar Steptoe that is deficient in NAD(P)H-bispecific nitrate reductase activity. A probe specific to the NAD(P)H-bispecific nitrate reductase structural gene detected restriction fragment length polymorphism between the parents. This probe was used to classify selected F2 progeny for restriction fragment length genotype. All the NAD(P)H nitrate reductase deficient F2 progeny (24/101) possessed the Az70 restriction fragment genotype. The absence of recombination between the NAD(P)H-bispecific nitrate reductase deficient genotype and the NAD(P)H-bispecific nitrate reductase restriction fragment length genotype indicates that the two traits are closely associated in inheritance and that Nar7 is probably the NAD(P)H-bispecific nitrate reductase structural gene.Key words: Hordeum vulgare, nitrate reductase, restriction fragment length polymorphism.

scholarly journals A southern analysis of Rh blood group genes: association between restriction fragment length polymorphism patterns and Rh serotypes

Blood ◽  
1994 ◽  
Vol 83 (2) ◽  
pp. 566-572 ◽  
Author(s):  
CA Hyland ◽  
LC Wolter ◽  
YW Liew ◽  
A Saul
Keyword(s):  
Restriction Fragment Length Polymorphism ◽  
Blood Group ◽  
Restriction Fragment ◽  
Length Polymorphism ◽  
Fragment Length ◽  
Fragment Length Polymorphism ◽  
Gene Dosage ◽  
Southern Analysis ◽  
Rh Blood Group ◽  
Restriction Fragment Length

Abstract Polymorphisms within the Rh blood group system have been defined by serologic agglutination methods, but have not yet been defined at the DNA level. Two closely related genes associated with the Rh D antigen and with the Rh C/c and E/e antigens have been cloned. We used a Southern analysis incorporating probes to the 5′ and 3′ regions of the Rh C, E gene and D gene to identify polymorphisms associated with Rh C/c and E/e antigens, respectively. The D gene dosage could be determined by comparing the relative intensities of the D bands with bands from the 5′ and 3′ region of the Rh C, E gene. The concordance between restriction fragment length polymorphism (RFLP) patterns and serologic phenotypes for 102 randomly selected blood donors was 100% for C, e, and D, 94.8% for c, and 94.3% for E. The data are consistent with the sequences encoding the C/c epitopes residing on the 5′ side of those for the E/e epitopes. All samples discordant for the 3′ probe and E had the cE (r″) serotype. These data show that the gene coding for the cE serotype is different in Rh-positive and -negative individuals. The study demonstrates that Rh DNA typing, including D gene dosage measurements and Rh gene haplotyping, may supplement traditional serotyping methods in transfusion medicine.

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