scholarly journals Inheritance of a Chlorophyll Deficiency in Hazelnut

HortScience ◽  
1991 ◽  
Vol 26 (11) ◽  
pp. 1414-1416 ◽  
Author(s):  
Shawn A. Mehlenbacher ◽  
Maxine M. Thompson
Keyword(s):  
Recessive Gene ◽  
Corylus Avellana ◽  
Pedigree Analysis ◽  
Field Conditions ◽  
Recessive Allele ◽  
Single Recessive Gene ◽  
Chlorophyll Deficiency ◽  
Segregation Ratios ◽  
Chlorophyll Deficiencies

A chlorophyll deficiency expressed as yellowing of leaves was observed in hazelnut (Corylus avellana L.) progenies. Segregation ratios approximated 3 green: 1 yellow, indicating control by a single recessive gene designated chlorophyll deficient #1, for which the symbol c, is proposed. `Barcelona', `Butler', `Compton', `Lansing', Willamette', and the ornamental selection `Redleaf #3' are heterozygous. Pedigree analysis strongly suggests that all heteroxygotes inherited the recessive allele from `Barcelona'. A cross of `Barcelona' with the yellow-leafed ornamental Corylus avellana L. var. aurea Kirchn. produced no yellow-leafed seedlings, indicating that the chlorophyll deficiencies from these two sources are controlled by different loci. Progenies segregating simultaneously for this trait and the gene controlling presence of anthocyanin indicated that the two traits are inherited independently. Seedlings deficient in chlorophyll but with anthocyanin were able to survive under field conditions, while leaves of yellow-leafed seedlings lacking anthocyanin became scorched and the trees died.

scholarly journals Inheritance of the Cutleaf Trait in Hazelnut

HortScience ◽  
1995 ◽  
Vol 30 (3) ◽  
pp. 611-612 ◽  
Author(s):  
Shawn A. Mehlenbacher ◽  
David C. Smith
Keyword(s):  
Leaf Shape ◽  
Recessive Gene ◽  
Corylus Avellana ◽  
Single Recessive Gene ◽  
Leaf Color ◽  
Chlorophyll Deficiency ◽  
Segregation Ratios

The cutleaf hazelnut [Corylus avellana L. f. heterophylla (Loud.) Rehder] is grown as an ornamental for its distinct leaf shape. Its leaves are slightly smaller, more deeply lobed, and more sharply toothed than those of standard hazelnut cultivars. When the cutleaf hazelnut was crossed with cultivars with normal leaves, all seedlings had normal leaves. When seedlings were backcrossed to their cutleaf parent, half of the seedlings expressed the cutleaf trait, and when crossed with each other in pairs, 25% of the seedlings were cutleaf. These segregation ratios indicate that the cutleaf trait is conferred by a single recessive gene for which the symbol cf is proposed. Progenies segregating simultaneously for leaf shape and color indicate that the cutleaf locus is independent of the locus controlling red leaf color and of the locus controlling a chlorophyll deficiency, which appears to be identical to that previously observed in seedlings of `Barcelona'.

scholarly journals Inheritance of male sterility in apricot

2001 ◽  
Vol 7 (3-4) ◽  
Author(s):  
L. Burgos ◽  
J. Egea
Keyword(s):  
Male Sterility ◽  
Recessive Gene ◽  
Male Parent ◽  
Recessive Allele ◽  
Single Recessive Gene ◽  
Male Sterile ◽  
Proposed Model ◽  
Previous Hypothesis ◽  
Nuclear Locus

Progenies (total of 1,114 seedlings) from crosses representing all possible genotypic combinations between 4 male-fertile and 1 male-sterile apricot parents were scored for the male sterility trait. Crosses between putative heterozygous normal cultivars yielded 25% of male-sterile seedlings, which supports a previous hypothesis that male sterility is controlled by a recessive allele of one nuclear locus. Crosses between those parents and putative homozygous normal cultivars did not produce any male-sterile tree. Finally, the proportion of male-sterile progeny in crosses between a male-sterile and two male-fertile cultivars depended on the genotype of the male parent. When it was heterozygous approximately 50% of the progeny was sterile, whereas when a homozygous fertile parent was used, no male-sterile progeny was obtained. These results confirm a previously proposed model, in which the male sterility trait in apricot is controlled by a single recessive gene.

Inheritance and qualitative analysis of pigments in a barley mutant

1971 ◽  
Vol 49 (1) ◽  
pp. 49-51 ◽  
Author(s):  
Kari Stephansen ◽  
Saul Zalik
Keyword(s):  
Quantitative Analysis ◽  
Hordeum Vulgare ◽  
Qualitative Analysis ◽  
Chlorophyll A ◽  
Recessive Gene ◽  
Single Recessive Gene ◽  
Hordeum Vulgare L ◽  
Chlorophyll Deficiency ◽  
Reciprocal Crosses ◽  
Barley Mutant

Reciprocal crosses were performed with barley (Hordeum vulgare L. cv. ‘Gateway’) and a virescens mutant derived from it. The results from F1 and F2 generations of the crosses showed that chlorophyll deficiency was governed by a single recessive gene. Quantitative analysis of pigment concentrations in normal and mutant shoots of F1 and F2 plants of the same age provided evidence for heterosis in chlorophyll a synthesis.

scholarly journals CHLOROPHYLL DEFICIENCIES IN LETTUCE

HortScience ◽  
1992 ◽  
Vol 27 (6) ◽  
pp. 608e-608 ◽  
Author(s):  
Edward J. Ryder
Keyword(s):  
Lactuca Sativa ◽  
Seedling Stage ◽  
Recessive Allele ◽  
Chlorophyll Deficiency ◽  
Single Allele ◽  
Chlorophyll Deficiencies

Three chlorophyll deficiency traits in lettuce (Lactuca sativa) are reported. One, chlorophyll deficient-3 (cd-3), is quite yellow in the seedling stage, and controlled by a single recessive allele. Chlorophyll deficient-4 (cd-4) has sectors of yellow-green and green in the true leaves. It is inherited as a single recessive, and may be allelic to chlorophyll deficient-2 (cd-2). Sickly (si) is stunted, yellow, and partially necrotic, and is also controlled by a single allele. Virescent (vi) is epistatic to cd-4 and the latter is partially lethal. Linkage and additional epistatic relations with previously named chlorophyll deficient genes and other traits are discussed.

scholarly journals 519 PB 477 INHERITANCE OF CONTORTED GROWTH HABIT IN HAZELNUT

HortScience ◽  
1994 ◽  
Vol 29 (5) ◽  
pp. 505g-505
Author(s):  
Shawn A. Mehlenbacher ◽  
David C Smith
Keyword(s):  
Growth Habit ◽  
Recessive Gene ◽  
Normal Growth ◽  
Corylus Avellana ◽  
Single Recessive Gene ◽  
Ornamental Tree

The contorted hazel, Corylus avellana `Contorta', is an ornamental tree prized for its grotesquely twisted trunk and branches. `Contorta' was discovered in a hedgerow in England about 1863 and has been commercially propagated by layerage or graftage because it was thought to not breed true from seed. We investigated the inheritance of contorted growth habit in the course of our work breeding hazelnuts. Crosses between normal growth habit cultivars and `Contorta' produce all normal seedlings. Sib matings of compatible normal seedlings of `Contorta' produce offspring in the proportion of 3 normal: 1 contorted. The backcross of a normal `Contorta' seedling to `Contorta' gives progeny in the ratio of 1 normal: 1 contorted, indicating control of the trait by a single recessive gene.

PROGRESSIVE VEINBANDING—A NEW MUTATION IN NICOTIANA TABACUM L.

1968 ◽  
Vol 10 (2) ◽  
pp. 232-234
Author(s):  
Bronius Povilaitis ◽  
D. R. Cameron
Keyword(s):  
Nicotiana Tabacum ◽  
Recessive Gene ◽  
Single Recessive Gene ◽  
Normal Allele ◽  
New Mutation ◽  
Mutant Type ◽  
Complete Dominance ◽  
Chlorophyll Deficiency ◽  
Monogenic Inheritance ◽  
Nicotiana Tabacum L

A new mutation for chlorophyll-deficiency in Nicotiana tabacum L., called progressive veinbanding, was found in the field planting of the flue-cured tobacco variety Hicks Broadleaf. The mutant follows monogenic inheritance of a single recessive gene upon which the normal allele exhibits complete dominance. There was a definite association of the mutant type with the M—chromosome of the sylvestris genome in tests against the monosomic series.

Genetic control of a slow-ripening fruit trait in nectarine

1991 ◽  
Vol 71 (2) ◽  
pp. 601-603 ◽  
Author(s):  
D. W. Ramming
Keyword(s):  
Key Words ◽  
Genetic Control ◽  
Prunus Persica ◽  
Recessive Gene ◽  
Stone Fruit ◽  
Single Recessive Gene ◽  
Segregation Ratios ◽  
Peach Breeding

Inheritance of a slow-ripening trait was investigated in segregating progenies of nectarine (Prunus Persica (L.), Batsch var. nucipersica Schneid). Segregation ratios suggest that the trait is controlled by a single recessive gene, for which the symbol sr is proposed. Fantasia, Flamekist, and Fairlane nectarines are heterozygous at the sr locus. Key words: Peach, breeding, postharvest, genetics, stone fruit

scholarly journals Flower, Fruit, and Petiole Color of American Beautyberry (Callicarpa americana L.) Are Controlled by a Single Gene with Three Alleles

HortScience ◽  
2014 ◽  
Vol 49 (4) ◽  
pp. 422-424
Author(s):  
Ryan N. Contreras ◽  
John M. Ruter ◽  
David A. Knauft
Keyword(s):  
Single Gene ◽  
Recessive Gene ◽  
Single Recessive Gene ◽  
Allelic Series ◽  
Southeast United States ◽  
Sexual Hybridization ◽  
Segregation Ratios ◽  
Self Compatibility ◽  
Deciduous Shrub ◽  
Gene Symbols

American beautyberry (Callicarpa americana) is a deciduous shrub native to the southeast United States and is grown primarily for its metallic-purple fruit that develop in the fall. There are also pink- and white-fruiting and variegated forms but these traits are rare in nature and there is no information available regarding their inheritance. Also, there is confusion regarding self-compatibility and the presence of apomixis in Callicarpa L. Crosses were performed to investigate the genetics of fruit color, self-compatibility, and apomixis in american beautyberry. Test crosses between C. americana (CA) and C. americana ‘Lactea’ (CAL) suggested that white fruit is recessive to purple. White fruit appears to be controlled by a single recessive gene for which we propose the name white fruit and the gene symbol wft. Although there were only a limited number of progeny grown, crosses between CA and ‘Welch’s Pink’ suggest that purple is dominant to pink. Test crosses between CAL and ‘Welch’s Pink’ are needed to draw conclusions; however, we propose that purple, pink, and white fruit are controlled by an allelic series for which we suggest the gene symbols Wft > wft p > wft. Segregation ratios suggested that all progeny in the study developed through sexual hybridization. All genotypes used in the current study were self-compatible.

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