scholarly journals Multigenerational pedigree analysis of wild individually marked black sparrowhawks suggests that dark plumage coloration is a dominant autosomal trait

2021 ◽  
Author(s):  
C. Nebel ◽  
P. Sumasgutner ◽  
E. Rodseth ◽  
R. A. Ingle ◽  
D. Z. Childs ◽  
...  
Keyword(s):  
Pedigree Analysis ◽  
Plumage Coloration

Comparative analysis of genetic background in eight near-isogenic wheat lines with different H genes conferring resistance to Hessian fly

Genome ◽  
2011 ◽  
Vol 54 (1) ◽  
pp. 81-89 ◽  
Author(s):  
S. S. Xu ◽  
C. G. Chu ◽  
M. O. Harris ◽  
C. E. Williams
Keyword(s):  
Genetic Background ◽  
Genetic Similarity ◽  
Triticum Aestivum L ◽  
Hessian Fly ◽  
Pedigree Analysis ◽  
Recurrent Parent ◽  
Linkage Drag ◽  
Near Isogenic Lines ◽  
Isogenic Lines ◽  
H Gene

Near-isogenic lines (NILs) are useful for plant genetic and genomic studies. However, the strength of conclusions from such studies depends on the similarity of the NILs’ genetic backgrounds. In this study, we investigated the genetic similarity for a set of NILs developed in the 1990s to study gene-for-gene interactions between wheat ( Triticum aestivum L.) and the Hessian fly ( Mayetiola destructor (Say)), an important pest of wheat. Each of the eight NILs carries a single H resistance gene and was created by successive backcrossing for two to six generations to susceptible T. aestivum ‘Newton’. We generated 256 target region amplification polymorphism (TRAP) markers and used them to calculate genetic similarity, expressed by the Nei and Li (NL) coefficient. Six of the NILs (H3, H5, H6, H9, H11, and H13) had the highly uniform genetic background of Newton, with NL coefficients from 0.97 to 0.99. However, genotypes with H10 or H12 were less similar to Newton, with NL coefficients of 0.86 and 0.93, respectively. Cluster analysis based on NL coefficients and pedigree analysis showed that the genetic similarity between each of the NILs and Newton was affected by both the number of backcrosses and the genetic similarity between Newton and the H gene donors. We thus generated an equation to predict the number of required backcrosses, given varying similarity of donor and recurrent parent. We also investigated whether the genetic residues of the donor parents that remained in the NILs were related to linkage drag. By using a complete set of ‘Chinese Spring’ nullisomic-tetrasomic lines, one third of the TRAP markers that showed polymorphism between the NILs and Newton were assigned to a specific chromosome. All of the assigned markers were located on chromosomes other than the chromosome carrying the H gene, suggesting that the genetic residues detected in this study were not due to linkage drag. Results will aid in the development and use of near-isogenic lines for studies of the functional genomics of wheat.

scholarly journals Pedigree analysis of the racing line Quarter Horse: Genetic diversity and most influential ancestors

2021 ◽  
pp. 104484
Author(s):  
Ricardo António da Silva Faria ◽  
António Pedro Andrade Vicente ◽  
Alejandra Maria Toro Ospina ◽  
Josineudson Augusto II Vasconcelos Silva
Keyword(s):  
Genetic Diversity ◽  
Pedigree Analysis ◽  
Quarter Horse

A novel RHD allele, with c . 491A > T ( p.Asp164Val ) mutation, identified via family pedigree analysis

Transfusion ◽  
2021 ◽  
Author(s):  
Jing Wang ◽  
Wenjun Que ◽  
Yan Xing ◽  
Qing Li ◽  
Tingxi Zhan ◽  
...  
Keyword(s):  
Pedigree Analysis ◽  
Family Pedigree

scholarly journals A Scan for Linkage Disequilibrium Across the Human Genome

Genetics ◽  
1999 ◽  
Vol 152 (4) ◽  
pp. 1711-1722 ◽  
Author(s):  
Gavin A Huttley ◽  
Michael W Smith ◽  
Mary Carrington ◽  
Stephen J O’Brien
Keyword(s):  
Linkage Disequilibrium ◽  
Human Genome ◽  
Pedigree Analysis ◽  
Exact Test ◽  
Genomic Scale ◽  
Genomic Regions ◽  
Formal Test ◽  
Scale Data ◽  
Short Tandem ◽  
Tandem Repeat Polymorphism

Abstract Linkage disequilibrium (LD), the tendency for alleles of linked loci to co-occur nonrandomly on chromosomal haplotypes, is an increasingly useful phenomenon for (1) revealing historic perturbation of populations including founder effects, admixture, or incomplete selective sweeps; (2) estimating elapsed time since such events based on time-dependent decay of LD; and (3) disease and phenotype mapping, particularly for traits not amenable to traditional pedigree analysis. Because few descriptions of LD for most regions of the human genome exist, we searched the human genome for the amount and extent of LD among 5048 autosomal short tandem repeat polymorphism (STRP) loci ascertained as specific haplotypes in the European CEPH mapping families. Evidence is presented indicating that ∼4% of STRP loci separated by <4.0 cM are in LD. The fraction of locus pairs within these intervals that display small Fisher’s exact test (FET) probabilities is directly proportional to the inverse of recombination distance between them (1/cM). The distribution of LD is nonuniform on a chromosomal scale and in a marker density-independent fashion, with chromosomes 2, 15, and 18 being significantly different from the genome average. Furthermore, a stepwise (locus-by-locus) 5-cM sliding-window analysis across 22 autosomes revealed nine genomic regions (2.2-6.4 cM), where the frequency of small FET probabilities among loci was greater than or equal to that presented by the HLA on chromosome 6, a region known to have extensive LD. Although the spatial heterogeneity of LD we detect in Europeans is consistent with the operation of natural selection, absence of a formal test for such genomic scale data prevents eliminating neutral processes as the evolutionary origin of the LD.

Pedigree analysis of a highly fragmented population, the Lidia cattle breed

2014 ◽  
Vol 167 ◽  
pp. 1-8 ◽  
Author(s):  
O. Cortés ◽  
N. Sevane ◽  
J.A. Baro ◽  
J. Cañón
Keyword(s):  
Cattle Breed ◽  
Pedigree Analysis ◽  
Fragmented Population

scholarly journals Feather corticosterone levels are not correlated with health or plumage coloration in juvenile house finches

2018 ◽  
Vol 124 (2) ◽  
pp. 157-164 ◽  
Author(s):  
Tuul Sepp ◽  
Steve Desaivre ◽  
Adam Z Lendvai ◽  
József Németh ◽  
Kevin J McGraw ◽  
...  
Keyword(s):  
Plumage Coloration ◽  
House Finches ◽  
Feather Corticosterone
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