Dominance variation across six herbicides of theArabidopsis thaliana csr1-1 andcsr1-2 resistance alleles

2005 ◽  
Vol 61 (11) ◽  
pp. 1089-1095 ◽  
Author(s):  
Fabrice Roux ◽  
Annick Matéjicek ◽  
Jacques Gasquez ◽  
Xavier Reboud
Keyword(s):  
Dominance Variation

Heredity and Dermal Patterns in the Interdigital Areas of the Palm

1965 ◽  
Vol 14 (3) ◽  
pp. 295-304 ◽  
Author(s):  
Edward V. Glanville
Keyword(s):  
Relative Position ◽  
Monozygotic Twins ◽  
Correlation Coefficients ◽  
Appreciable Amount ◽  
Pedigree Data ◽  
Ridge Count ◽  
Hereditary Factors ◽  
Dominance Variation ◽  
Additive Genes

SUMMARYHereditary factors involved in the determination of the size, relative position and type of pattern formed by the dermal ridges in the interdigital areas of the palm have been investigated by means of twin and family studies. The sample consisted of 566 individuals of European descent. The ridge-counts of patterns in the interdigital areas were determined. Correction factors were introduced to compensate for different average counts in each interdigital area. The correlation coefficients between family relatives were calculated using the ridge-counts. The coefficient for monozygotic twins was .88±.04 and for parent and child from .346 to .425 and for sib pairs from .328 to .412. There was no evidence of sex-linkage or of the effects of dominance. Variation appeared to be determined by additive genes but an appreciable amount of variation of non-genetic origin was observed. Bilateral asymmetry in the ridge-count, type of pattern and relative position of the patterns was evident. Concordance rates in twins and other family members and pedigree data provided further evidence of hereditary influence in the determination of the position and type of pattern in the interdigital areas.

scholarly journals GENERATION MEAN ANALYSIS FOR ESTIMATION SOME GENETIC PARAMETERS FOR YILD AND YIELD COMPONENTS IN FOURE MAIZE CROSSES.

2016 ◽  
Vol 47 (1) ◽  
Author(s):  
B. H. Hadi
Keyword(s):  
Grain Yield ◽  
First Generation ◽  
Recurrent Selection ◽  
Unit Area ◽  
Block Design ◽  
Relative Magnitude ◽  
Hybrid Vigor ◽  
Reciprocal Recurrent Selection ◽  
Additive Gene ◽  
Dominance Variation

A field experiment was conducted at the field of Field Crop .Dept., College of Agric\Univ.of Baghdad. spring and fall seasons of 2009, 2010 , spring of 2011 and fall of 2013 in order to know the relative magnitude of the genetic variation component and interactions forms of epistasis using Generation Means Analysis  of maize (Zea mays L.) . Six generations P1 , P2 , F1 , F2, BC1 and BC2 for four crosses (FI01301 Rustico), (AntignaoHi39× Nostred ) , (Lo1391 ×Rustico) and ( Rusticocangini× Rustico) were  evaluated by using randomized complete block design( RCBD) with four replications for grain yield and its components. The results showed significant differences between the generations of the four crosses. The first generation superiority and gave the highest mean for each of the traits of four crosses. The highest hybrid vigor and heterosis percent to  for unit area  grain yield (ton\ha) 121.8% and 126.92% for cross( FI01301 ×Rustico ). Most of the genetic effects  (d additive , dominance h , additive  × additive  i , additive × dominance j and dominance × dominance l) were significant for all crosses . This revealed  the importance of the dominance, additive and epistasis effects as genetic actions   controlled  in yield  inheritance and its components in maize. But the dominance variation was more important than the additive variation in the ear length  ,grain weighte and yield unit area, disagreement signal indicate the existence of an act of the dominance h and dominance× dominance  l of most studied traits duplicate epistasis. Supplementary superiority also appeared to Epistasis complementary of crosses (FI01301×Rustico) and (AntignaoHi39×Nostred) and grain weight in cross (Lo1391 ×Rustico ). It can be conclude that the additive and  non-additive gene action control the in heritable yield and its component . It is recommend using the method of reciprocal  recurrent selection(RRS) to improve yield and its components .                                                                                                                                            

EPISTATIC BIAS IN ADDITIVE AND DOMINANCE VARIATION AND GENETIC ASSOCIATIONS BETWEEN TWO QUALITY TRAITS IN BREAD WHEAT

1972 ◽  
Vol 14 (1) ◽  
pp. 49-55 ◽  
Author(s):  
K. S. Bains ◽  
K. S. Gill ◽  
K. L. Sehgal
Keyword(s):  
Grain Protein ◽  
Asymmetric Distribution ◽  
Quality Traits ◽  
Genetic Associations ◽  
Narrow Sense Heritability ◽  
Gene Effects ◽  
Epistatic Interactions ◽  
Additive Component ◽  
Additive Gene ◽  
Dominance Variation

Grain protein and Pelshenke value in 8 × 8 diallel crosses and after eliminating the interacting arrays were genetically analysed. All the dominance variation for grain protein was due to epistatic interactions. The dominance component for Pelshenke value was considerably inflated by epistasis. For both characters, the dominance component was affected more by the epistatic bias than the additive component of genetic variance, resulting in considerably low narrow-sense heritability estimates. Covariance between grain protein and Pelshenke value was primarily due to additive gene effects and was attributed to pleiotropic relationships in the absence of genetic linkage. An ambidirectional trend of dominance with an asymmetric distribution of dominant and recessive alleles among the cultivars was observed for grain protein, whereas preponderance of the dominant decreasing genes with more isodirectional gene distribution was operative for Pelshenke value. Correlated responses of these quality traits to selection due to high additive genetic correlation and degree of co-inheritance in relation to their gene action is stressed.

Parental GCA testing: How many crosses per parent?

1998 ◽  
Vol 28 (4) ◽  
pp. 540-545 ◽  
Author(s):  
G R Johnson
Keyword(s):  
Monte Carlo Simulation ◽  
Monte Carlo ◽  
Genetic Variation ◽  
Pseudotsuga Menziesii ◽  
Tree Improvement ◽  
Seed Orchards ◽  
Improvement Programs ◽  
Dominance Variation ◽  
The Impact ◽  
Advanced Generation

The impact of increasing the number of crosses per parent (k) on the efficiency of roguing seed orchards (backwards selection, i.e., reselection of parents) was examined by using Monte Carlo simulation. Efficiencies were examined in light of advanced-generation Douglas-fir (Pseudotsuga menziesii (Mirb.) Franco) tree improvement programs where information is available from previous generations, seed orchards have reduced genetic variation as a result of selection, and dominance variation is small compared with additive variation. Both the efficiency of reselection and its associated variance leveled off after two or three crosses per parent. The information from previous generations did not significantly increase reselection efficiency.

scholarly journals Experimental sizes for detecting dominance variation

Heredity ◽  
1970 ◽  
Vol 25 (4) ◽  
pp. 529-542 ◽  
Author(s):  
M J Kearsey
Keyword(s):  
Dominance Variation
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