Inheritance and linkage relationships of genes conditioning hullessness, multiflorous spikelet, and giantism in oat (Avena sativa L.)

1994 ◽  
Vol 74 (3) ◽  
pp. 497-500 ◽  
Author(s):  
Solomon Kibite ◽  
John S. Taylor
Keyword(s):  
Avena Sativa ◽  
Gene Action ◽  
Recombination Frequency ◽  
Recessive Gene ◽  
Epistatic Effect ◽  
Number Of Genes ◽  
Pedicle Length ◽  
Length Width ◽  
Recombination Value ◽  
Linkage Relationships

A study was conducted to determine the number of genes, type of gene action, and linkage relationships of the factors controlling the expression of hullessness, multiflorous spikelet and giantism in oat (Avena sativa L. var. PI 546363). The results showed that giantism was governed by a recessive gene, which in a homozygous (gi-3/gi-3) condition may have an epistatic effect on several other loci including those controlling the expression of plant height; length, width, and thickness of leaves; culm diameter; number of internodes; panicle size; pedicle length; and number of days to anthesis and to maturity. The results also indicated monogenic inheritance for hull and spikelet characteristics. Hullessness (N-1/_) was dominant over hulledness (n-1/n-1), and multiflorous spikelet (Mf-1/-) was partially dominant over normal spikelet (mf-1/mf-1). Linkage was detected between the gi-3 locus controlling giantism, and the n-1 locus controlling hullessness; the recombination value was calculated to be 36.5 ± 0.8%. Linkage was also detected between the gi-3 gene and the Mf-1 locus conditioning multiflorous spikelet; the recombination value was 23.5 ± 0.4%. The N-1 gene appears to have an epistatic effect on the Mf-1 locus, and the recombination frequency between the two loci was 10.5 ± 0.6%. The gene order was gi-3, Mf-1, N-1. Key words: Oat, Avena sativa, genetics, giantism, hullessness, multiflorous spikelet

Inheritance of resistance to diclofop-methyl and fenoxaprop-p-ethyl in two Avena sativa × A. fatua populations

1995 ◽  
Vol 75 (1) ◽  
pp. 81-85 ◽  
Author(s):  
Solomon Kibite ◽  
K. N. Harker ◽  
P. D. Brown
Keyword(s):  
Herbicide Resistance ◽  
Avena Sativa ◽  
Gene Action ◽  
Cross Resistance ◽  
Western Canada ◽  
Inheritance Of Resistance ◽  
Wild Oat ◽  
Herbicide Resistant ◽  
Or Groups ◽  
Number Of Genes

Since the late 1980s, several reports of herbicide-resistant wild oat have raised concern about potential weed control problems in western Canada. This study was conducted to determine the mode of inheritance, number of genes and type of gene action governing herbicide resistance in two Avena sativa × A. fatua crosses. The herbicide-susceptible A. sativa cultivars, Random and Derby, were crossed with a resistant A. fatua genotype, GP-HR-01. Parents, F2s and F2:3 families were tested for their reactions to two post-emergent wild oat herbicides, diclofop-methyl and fenoxaprop-p-ethyl, in the greenhouse. Inheritance of resistance to diclofop-methyl and fenoxaprop-p-ethyl was dominant and monogenic in the Derby/GP-HR-01 cross, but was controlled by two dominant complementary genes in the Random/GP-HR-01 cross. Resistance to both herbicides appeared to be controlled by the same genes or groups of tightly linked genes. Key words:Avena sativa, Avena fatua, herbicide resistance, weed (genetics), diclofop-methyl, fenoxaprop-p-ethyl

scholarly journals INHERITANCE OF FERTILITY RESTORATION INVOLVING WILD ABORTIVE CYTOPLASMIC MALE STERILITY SYSTEM IN RICE (Oryza sativa L.)

2011 ◽  
Vol 24 (1) ◽  
pp. 33-40
Author(s):  
M. J. Hasan ◽  
M. U. Kulsum ◽  
A. Ansari ◽  
A. K. Paul ◽  
P. L. Biswas
Keyword(s):  
Oryza Sativa ◽  
Cytoplasmic Male Sterility ◽  
Male Sterility ◽  
Gene Action ◽  
Oryza Sativa L ◽  
Fertility Restoration ◽  
Dominant Gene ◽  
Recessive Gene ◽  
Male Sterile ◽  
Male Sterile Line

Inheritance of fertility restoration was studied in crosses involving ten elite restorer lines of rice viz. BR6839-41-5-1R, BR7013-62-1-1R, BR7011-37-1-2R, BR10R, BR11R, BR12R, BR13R, BR14R, BR15R and BR16R and one male sterile line Jin23A with WA sources of cytoplasmic male sterility. The segregation pattern for pollen fertility of F2 and BC1 populations of crosses involving Jin23A indicated the presence of two independent dominant fertility restoring genes. The mode of action of the two genes varied in different crosses revealing three types of interaction, i.e. epistasis with dominant gene action, epistasis with recessive gene action, and epistasis with incomplete dominance.DOI: http://dx.doi.org/10.3329/bjpbg.v24i1.16997

scholarly journals Inheritance and Linkage Relationships of Isozymes in Easter Cactus

1998 ◽  
Vol 123 (1) ◽  
pp. 98-103
Author(s):  
Maureen C. O'Leary ◽  
Thomas H. Boyle
Keyword(s):  
Interspecific Hybrids ◽  
Triosephosphate Isomerase ◽  
Recombination Frequency ◽  
Polyacrylamide Gel Electrophoresis ◽  
Interspecific Crosses ◽  
Germplasm Collections ◽  
Segregation Ratios ◽  
Isozyme Loci ◽  
Linkage Relationships ◽  
Aberrant Segregation

Polyacrylamide gel electrophoresis was used to study inheritance and linkage of isozymes in Easter cactus (Hatiora species and interspecific hybrids). Five isozyme systems were analyzed: aspartate aminotransferase (AAT), glucose-6-phosphate isomerase (GPI), malate dehydrogenase (MDH), phosphoglucomutase (PGM), and triosephosphate isomerase (TPI). F1, F2, BC1, and S1 progeny were used for inheritance studies. Six polymorphic loci (Aat-1, Gpi-1, Mdh-1, Pgm-1, Pgm-2, and Tpi-2) were identified. Aat-1 and Pgm-1 were linked (recombination frequency = 26% ± 7%), but the other isozyme loci assorted independently. Aberrant segregation ratios were observed in at least one segregating family for all six isozyme loci. We hypothesize that segregation distortion was due to linkage between isozyme loci and other genes subject to pre- or postzygotic selection. The existence of five additional isozyme loci (Aat-2, Gpi-2, Mdh-2, Mdh-3, and Tpi-1) was inferred from segregation patterns and by comparison of isozyme profiles from phylloclades and pollen. These isozyme loci may prove useful for confirming hybridity in intra- and interspecific crosses, determining parentage of cultivars, and assessing genetic diversity in germplasm collections.

scholarly journals DYNAMICS OF HERITABILITY IN DIFFERENT CHARACTERS OF LETTUCE

2021 ◽  
Vol 34 (3) ◽  
pp. 514-526
Author(s):  
ALISSON HENRIQUE GAMA DE OLIVEIRA ◽  
GABRIEL MASCARENHAS MACIEL ◽  
ANA CAROLINA SILVA SIQUIEROLI ◽  
JOSÉ MAGNO QUEIROZ LUZ ◽  
ERNANI CLARETE DA SILVA
Keyword(s):  
Chlorophyll Content ◽  
Gene Action ◽  
Gene Interactions ◽  
Narrow Sense ◽  
Narrow Sense Heritability ◽  
Additive Variance ◽  
Dominant Type ◽  
Partial Dominance ◽  
Number Of Genes ◽  
Number Of Leaves

ABSTRACT The lack of knowledge of the genetic parameters and the type of gene action results in difficulties to obtain varieties that combine agronomic and functional characteristics. The objective of this study was to determine the type of gene action associated with the contents of chlorophyll and agronomic characteristics in lettuce populations. The research was conducted at the Experimental Station of Vegetables, Monte Carmelo, Brazil. To perform the crosses and obtain the generations P1, P2, F1, F2, Bc1 and Bc2 the genotypes UFU-Albina#2, UFU-Albina#3, UFU-Lisa124#2#1, UFU-Crespa199#1#1 and UFU-Lisa217#5#2 were used as parents. The generations were evaluated for three characteristics: number of leaves, plant diameter and chlorophyll content. The parameters: genetic, phenotypic, environmental and additive variance, the dominance in F2, heritability in the broad and narrow-sense, the average degree of dominance based on averages, number of genes, the measure of the dominance deviations, additive effects and all interactions of ‘additive x additive’, ‘additive x dominant’ and ‘dominant x dominant’ type, were evaluated. Chlorophyll content was the most influenced by the environment. Plant diameter had the highest narrow-sense heritability for the cross UFU-Lisa-124#2#1 x UFU-Albina#3 (82.1%). The number of genes for the number of leaves varied from inconclusive to a minimum of 9 genes. The gene interactions for number of leaves were of overdominance type, while for plant diameter and for chlorophyll content the gene interactions were of partial dominance. The characteristics are suggested as being of polygenic or oligogenic nature.

scholarly journals Linkage relationships of markers on chromosome 17 of the house mouse

1975 ◽  
Vol 26 (2) ◽  
pp. 203-211 ◽  
Author(s):  
Graig Hammerberg ◽  
Jan Klein
Keyword(s):  
House Mouse ◽  
Chromosomal Region ◽  
Recombination Frequency ◽  
Genetic Distances ◽  
Chromosome 17 ◽  
Linkage Data ◽  
Crossing Over ◽  
The Right ◽  
Linkage Relationships ◽  
Important Marker

SUMMARYLinkage data for the following markers on chromosome 17 of the house mouse were obtained: centromere (marked by translocation R67), Brachyury (T), tufted (tf), H-2, and thin fur (thf). The markers were found to be arranged in that order in the genetic map and the combined genetic distances between individual markers were found to be as follows: Rb7…T, 4·5 cM; T…tf, 5·8 cM; tf…H-2, 5·0 cM; H-2…thf, 15·1 cM. The localization of the thf locus on the non-centromeric side of the H-2 complex provides an important marker for this arm of chromosome 17. The map distances in the centromeric portion of chromosome 17 changed drastically in the presence of various t factors. These factors strongly reduce the recombination frequency in the T…tf and tf…H-2 intervals and this crossing-over suppression is most likely responsible for the linkage disequilibrium between t and H-2 reported earlier. Recombinants involving a t chromosome but occurring to the right of the H-2 complex do not change the properties of t factors suggesting that all determinants responsible for the t phenotype are located in the chromosomal region between T and tf (H-2).

scholarly journals GENE ACTION OF AGRONOMIC TRAITS IN RICE (Oryza sativa L.)

2007 ◽  
Vol 20 (2) ◽  
pp. 31-36
Author(s):  
P. S. Biswas ◽  
M. Enamul Haque
Keyword(s):  
Gene Action ◽  
Agronomic Traits ◽  
Oryza Sativa L ◽  
Dominant Gene ◽  
Recessive Gene ◽  
Diallel Cross ◽  
Thousand Grain Weight ◽  
Dominance Model ◽  
Partial Dominance ◽  
Days To Heading

Six parent diallel cross without reciprocal was studied to investigate the genetic behavior of different agronomic traits in rice. The analysis of Wr-Vr graph showed that panicle length, thousand grain weight and grain yield per plant did not follow the additive-dominance model indicating epistatic gene action responsible for the expression of these traits. All other traits under the study were conditioned by overdominance gene action except grains per panicle, which was controlled by partial dominance. The Yr? – (Vr + Wr)? graph revealed random distribution of dominant and recessive gene in expressing different traits in different parent, while correlation between parental mean and parental order of dominance indicated increasing effect of dominant gene for all the traits except days to heading and % spikelet sterility.DOI: http://dx.doi.org/10.3329/bjpbg.v20i2.17033

Inheritance and linkage relationships of seed peroxidase loci in hexaploid oat (Avena sativa L.)

Genome ◽  
1995 ◽  
Vol 38 (3) ◽  
pp. 467-471
Author(s):  
N. R. Sharopova ◽  
A. A. Sozinov ◽  
V. A. Portyanko
Keyword(s):  
Avena Sativa ◽  
Gel Electrophoresis ◽  
Polyacrylamide Gel Electrophoresis ◽  
Polyacrylamide Gel ◽  
The Other ◽  
Linkage Groups ◽  
Peroxidase Isozyme ◽  
Linkage Relationships

Polyacrylamide gel electrophoresis has been used to investigate the inheritance and linkage relationships between anodal (PXA) and cathodal (PXC) seed peroxidases in hexaploid oat (Avena sativa L.). A total of 12 seed peroxidase loci (5 loci of PXA and 7 loci of PXC) were identified in three crosses. Only two Pxc loci (Pxc5 and Pxc7) were not linked to any peroxidase loci; the others were scored in three linkage groups. The order of the three loci assigned to one of the linkage groups was Pxc1–Pxa5–Pxc2. The order of loci in the other two linkages were Pxc4–Pxa1–Pxa3 and Pxc3–Pxa4–Pxa2. Also, the Pxc6 locus was shown to be linked to the Pxc3 locus. Considering that A. sativa is an allohexaploid, it can be proposed that the three peroxidase linkages represent homoeologous chromosomes.Key words: seed peroxidase, isozyme inheritance, linkage, Avena sativa.

REACTION OF WHEAT TO COMMON ROOT ROT: LINKAGE OF A MAJOR GENE, Crr, WITH THE CENTROMERE OF CHROMOSOME 5B

1982 ◽  
Vol 24 (1) ◽  
pp. 19-25 ◽  
Author(s):  
Ruby I. Larson ◽  
T. G. Atkinson
Keyword(s):  
Root Rot ◽  
Recombination Frequency ◽  
Major Gene ◽  
Recessive Gene ◽  
Triticum Aestivum L ◽  
Common Root ◽  
Telocentric Chromosome ◽  
Chromosome 5B ◽  
The Difference ◽  
Moderate Resistance

'Cadet' (C), a cultivar of Triticum aestivum L., carries the major recessive gene, Crr, for moderate resistance to common root incited by Cochliobolus sativus (Ito and Kurib.) Drechs. ex Dastur, on the long arm of chromosome 5B. The highly susceptible cultivar, 'Rescue' (R), has the dominant, epistatic allele, crr. The crossover distance from the centromere to this gene was estimated in the genetic background of both Cadet and Rescue. The ditelosomic for the long arm of each of the lines Ct"5BL (Crr) and Rt"5BL (crr) was crossed by the corresponding reciprocal chromosome 5B substitutions, C-R5B (crr) and R-C5B (Crr). The F1's, heterozygous for both the telocentric and the alleles, were then backcrossed by the appropriate recessive lines, Cadet and R-C5B. Each backcross plant was tested for its reaction to root rot and examined cytologically for the presence of a telocentric chromosome. The recombination frequency of the centromere, marked by the presence or absence of the telocentric, with alleles at the Crr locus was 42.9 ± 3.4% in the Cadet background. In the Rescue background, the recombination frequency was 36.1 ± 3.3%. The difference is attributed to a generally lower chiasma frequency in Rescue than in Cadet.

scholarly journals Inheritance of Resistance to Pepper huasteco yellow vein virus in Capsicum annuum L.

HortScience ◽  
2019 ◽  
Vol 54 (5) ◽  
pp. 783-786
Author(s):  
Jesús Enrique Retes-Manjarrez ◽  
Sergio Hernández-Verdugo ◽  
Carlos Alfonso López-Orona ◽  
Raymundo Medina-López ◽  
José Antonio Garzón-Tiznado ◽  
...  
Keyword(s):  
Capsicum Annuum ◽  
Maternal Inheritance ◽  
Recessive Gene ◽  
Yellow Vein ◽  
Susceptible Parent ◽  
Sources Of Resistance ◽  
Breeding Programs ◽  
Number Of Genes ◽  
In The Wild ◽  
Resistant Trait

Pepper huasteco yellow vein virus (PHYVV) is a major disease in pepper (Capsicum annuum) that causes quantitative and qualitative losses to the crop in Central America and part of North America. To date, no resistant cultivars are available, and breeding is hampered by the lack of knowledge of the inheritance of this trait. Sources of resistance to PHYVV have been identified in the wild peppers of Mexico. The objectives of this study were to determine the grade of dominance, to analyze the maternal influence, and to estimate the number of genes involved in this resistant trait to PHYVV in the resistant wild pepper accession UAS12. Three susceptible parent lines—‘Anaheim’ (Ana), ‘Ancho Gigante’ (AG), and ‘Yolo Wonder’ (YW)—were crossed with resistant UAS12 accession to develop F1 (reciprocal), F2, and BC1 progenies in three families. Plants from this study were inoculated with PHYVV through Bemisia tabaci, evaluated phenotypically, and the segregation of disease scores was studied. A single recessive gene was found to control resistance to PHYVV in the resistant UAS12 accession, although segregation patterns suggested that other minor genes could participate in the expression of this resistant trait. No proof was found for maternal inheritance of PHYVV resistance. The gene symbol phv is proposed for PHYVV resistance in UAS12 accession in pepper. These results provide useful information for the design of pepper breeding programs in the introgression of this trait into commercial pepper backgrounds.

The inheritance of β-glucan concentration in three oat (Avena sativa L.) crosses

1998 ◽  
Vol 78 (2) ◽  
pp. 245-250 ◽  
Author(s):  
Solomon Kibite ◽  
M. J. Edney
Keyword(s):  
Avena Sativa ◽  
Oil Content ◽  
Gene Action ◽  
Degenerative Diseases ◽  
Additive Type ◽  
Oat Cultivars ◽  
Parental Lines ◽  
Three Factor ◽  
Mode Of Inheritance ◽  
New Cultivars

Several reports have indicated that oat β-glucans may play an important role in reducing the incidence of degenerative diseases in humans. However, little information has been published on the inheritance of β-glucan concentration in oat. The development of new cultivars with improved β-glucan concentration would be simplified if the mode of inheritance is understood. Three experiments, each using two parental lines and their F1, F2, F3, BC1F2 and BC2F2 generations, were carried out to determine the inheritance of β-glucan concentration. The results indicate that β-glucan concentration is controlled by a minimum of two or three factor pairs with a predominantly additive type of gene action. In the majority of the generations, β-glucan concentration was found to be positively correlated with protein content and negatively correlated with oil content. It was not correlated with grain yield, number of panicles/plant, or number of kernels per panicle. The broad-sense heritability of β-glucan concentration ranged from 0.45 to 0.58 in the F2, and from 0.48 to 0.56 in the F3 generations, suggesting that it may be relatively easy to develop new oat cultivars with high- or low-β-glucan concentration. Key words: Avena sativa, oat, β-glucan concentration, inheritance

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