Minimum Family Sizes for the Planning of Genetic Experiments

Hanson, W. D.

doi:10.2134/agronj1959.00021962005100120005x

Cited by 124 publications

(58 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…In such cases, the genes in the two varieties could either be allelic or linked too closely for a recombinant to be detected in the population tested. The maximum recombination frequency which could have passed undetected (at P = 0.05) was calculated from the formula outlined by Hanson (1959), viz. :…”

Section: Methodsmentioning

confidence: 99%

The inheritance of resistance to Rhynchosporium secalis in barley

Habgood

Hayes

1971

Heredity

View full text Add to dashboard Cite

SEVERAL studies have been carried out, mainly in the U.S.A., on the inheritance of resistance to the leaf blotch (or scald) disease of barley, caused by Rhynchosporium secalis (Oudem.) J. J. Davies. Mackie (1929) found that resistance in an unspecified variety was controlled by a single recessive gene. Riddle and Briggs (1950) identified a single dominant gene conferring resistance in La Mesita, which was also present with a recessive gene in Trebi and Cal jfornia 1311 (= Modoc), and with one or more additional dominant genes in Turk. A designation for genes conferring resistance to R. secalis was first used by Bryner (1957), who allocated the symbol Rha and Turk), Rh4 (in La Mesita, Osiris and Trebi), Rh42 (an allele at the Rh4 locus, in Modoc) and Rh5 (in Turk). These genes were shown to be specific against certain races of the pathogen. The Rh3 and Rh4 loci were very closely linked on chromosome 3 (Dyck and Schaller, 1961a, b), and Rh3 was considered to be identical, allelic or closely linked to the Rh locus in Brier.

show abstract

Section: Methodsmentioning

confidence: 99%

The inheritance of resistance to Rhynchosporium secalis in barley

Habgood

Hayes

1971

Heredity

View full text Add to dashboard Cite

show abstract

“…In addition, the segregation of the F 2:5 lines for resistance to race T13 in the cross Laura/Triple Dirk fit not only a 15:1 ratio but also a 3:1 ratio. For a test of a 3:1 against 15:1 ratios, the minimum number of lines required is about 40 at the α level of 0.05 (Mather 1938;Hanson 1959), therefore, the number of lines (29-30) tested is on the small side. Nevertheless, the better fit to a 3:1 ratio (P = 0.21) suggests that Triple Dirk may possess one gene for resistance to race T13.…”

Section: Resistance To Race T13mentioning

confidence: 99%

Inheritance of resistance to common bunt in spelt and common wheat

Hughes¹

2003

Can. J. Plant Sci.

View full text Add to dashboard Cite

He, C. and Hughes, G. R. 2003. Inheritance of resistance to common bunt in spelt and common wheat. Can. J. Plant Sci. 83: 47-56. Common bunt causes yield loss and reduces grain quality in both common and durum wheats in western Canada. Since the most cost-effective method of control is the use of host resistance, this study was conducted to provide information on the genetic control of bunt resistance in three potentially new sources: common wheat cultivar Triple Dirk and spelt wheat cultivars RL5407 and SK0263. The segregating populations from the three crosses Laura/Triple Dirk, Laura/RL5407 and Genesis/SK0263 were evaluated for common bunt resistance in the field for races T1, T13 and L7 and in the greenhouse for race T1. Genetic analysis indicated that Triple Dirk may carry a major gene controlling resistance to each of the bunt races T1, T13 and L7. The spelt wheat RL5407 may carry a major gene for resistance to both races T13 and L7 or genes conditioning resistance to T13 and L7 that are closely linked, and an additional major gene for resistance to race T1. The two major genes carried by RL5407 are believed to be different. SK0263 possibly carried two major genes for resistance to race T1. The disease data in F 1 and F 2 generations did not show any dominance for bunt resistance to race T1 in any of the three crosses. From crosses involving Triple Dirk, RL5407 and SK0263, selection of breeding lines highly resistant to common bunt can be effective in the progenies due to the nature of nondominance and one-or two-gene controlled resistance.Kew words: Wheat, common bunt, Triticum sp., Tilletia sp. et Genesis/SK0263 pour voir si elles résistaient aux races T1, T13 et L7 de la carie au champ et à la race T1 en serre. L'analyse génétique révèle que Triple Dirk pourrait porter un gène important codant la résistance aux races T1, T13 et L7. La variété d'é-peautre RL5407, quant à elle, possèderait un gène majeur de résistance aux races T13 et L7 ou des gènes étroitement liés, conditionnant cette résistance, ainsi qu'un gène important de résistance à la race T1. On croit que les deux grands gènes de résistance de RL5407 sont différents. Par ailleurs, il se pourrait que SK0263 porte deux gènes majeurs de résistance à la race T1. Selon les données recueillies sur la F 1 et la F 2 , aucun des trois croisements ne présente de gène dominant codant la résistance à la race T1. La sélection de lignées généalogiques très résistantes à la carie du blé parmi les hybrides de Triple Dirk, de RL5407 et de SK0263 pourrait s'avérer efficace puisque la résistance n'est pas codée par un gène dominant ou résulte de l'action d'un seul ou de deux gènes.

show abstract

“…No recombination was detected between the main RFLP bands detected with these two clones among the 431 F 2 individuals of T. monococcum analyzed here. Complete linkage in 862 chromosomes indicates a maximum genetic distance between the Gsp-A m 1 and Pina-A m 1 genes of 0.3 cM with a 95% probability (Hanson 1959).…”

Section: Genetic Mapmentioning

confidence: 99%

Genetic and physical characterization of grain texture-related loci in diploid wheat

et al. 1999

View full text Add to dashboard Cite

Endosperm texture, i.e. the hardness or softness of the grain, is an important quality criterion in cereals because it determines many grain end-use properties. Grain softness is the dominant trait and is mainly controlled by the Ha locus on the short arm of chromosome 5D in hexaploid bread wheat. Genes for puroindoline a (Pina-D1), puroindoline b (Pinb-D1), and grain softness related protein (Gsp-D1) have been shown to be linked to the Ha locus in dierent mapping populations and have been associated with the expression of grain softness. The study of the linkage relationships among these genes has been limited by the low level of polymorphism in the D genome of hexaploid Triticum aestivum. In the present study, a highly polymorphic Triticum monococcum mapping population was used to analyze linkage relationships among these three genes. Gsp-A m 1 and Pina-A m 1 were found to be completely linked and lie 0.14 cM distal to Pinb-A m 1 in the distal region of the short arm of chromosome 5A m . The tight genetic linkage among these three genes was paralleled by their physical proximity within a single 105-kb clone isolated from a T. monococcum bacterial arti®cial chromosome (BAC) library. A restriction map of this BAC clone showed that Pina-A m

show abstract

Minimum Family Sizes for the Planning of Genetic Experiments

Cited by 124 publications

References 0 publications

The inheritance of resistance to Rhynchosporium secalis in barley

The inheritance of resistance to Rhynchosporium secalis in barley

Inheritance of resistance to common bunt in spelt and common wheat

Genetic and physical characterization of grain texture-related loci in diploid wheat

Contact Info

Product

Resources

About