Preliminary Report on Interspecific Hybridization in Forest Trees

Johnson, L. P. V.; Heimburger, C.

doi:10.1139/cjr46c-028

Cited by 15 publications

(6 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Artificial hybrids of black and red spruce were first produced by Johnson and Heimburger (1946) at Petawawa Forest Experiment Station. These, and natural hybrids detected in a red spruce plantation, exhibit hybrid vigour (Holst 1964).…”

Section: Genetic Relationships and Lnterspecific Hybridizationmentioning

confidence: 99%

Genetics and Breeding of Black Spruce and Red Spruce

Morgenstern¹,

Fowler²

1969

The Forestry Chronicle

View full text Add to dashboard Cite

show abstract

Section: Genetic Relationships and Lnterspecific Hybridizationmentioning

confidence: 99%

Genetics and Breeding of Black Spruce and Red Spruce

Morgenstern¹,

Fowler²

1969

The Forestry Chronicle

View full text Add to dashboard Cite

show abstract

“…The results of our interspecific crosses differ from those obtained by several previous studies in two important aspects. Smith and Nichols (1941), Johnsson (1945), Johnson and Heimburger (1946) and Clausen (1966Clausen ( , 1970 all report successful crosses between B. lenta and one or more white-barked species within the section Excelsae (B. platyphylla var. japonica, B. populifolia, B. papyrifera, and B. pubescens), and all but Johnsson (1945) indicate successfully producing interspecific hybrids between B. nigra and several of these same Excelsae species.…”

Section: Resultsmentioning

confidence: 99%

Effectiveness of Interspecific Hybridization for Incorporating Birch Leafminer (Fenusa pusilla) Resistance into White-barked Betula

Hoch¹,

Jung²,

McCown³

2002

jashs

View full text Add to dashboard Cite

A significant pest affecting commonly planted Betula spp. is the birch leafminer (Fenusa pusilla Lepeletier), an insect that can be present in large populations in the landscape and can greatly reduce the vigor and ornamental value of these trees. Twenty-two interspecific crosses were performed between leafminer resistant and susceptible Betula species in an attempt to create the novel combination of ornamental white bark and significant leafminer resistance. Of the nine successful crosses, two produced resistant offspring. Progeny of the diploid × hexaploid cross B. turkestanica Litvin (2x) × B. alleghaniensis Britt. (6x) displayed a broad range of resistance levels, likely the result of segregating alleles contributed by the hexaploid parent. All crosses involving highly resistant individuals of B. costata Trautv. (2x) yielded leafminer susceptible progeny. These results suggest that the larval antibiosis demonstrated by B. alleghaniensis and B. costata is inherited as a recessive trait, and exhibits a gene dosage effect as evidenced by the B. turkestanica × B. alleghaniensis offspring. While most progeny of the B. populifolia Marsh (2x) × B. maximowicziana Regal (2x) cross were susceptible, a single resistant offspring, which was found to be triploid (3x), displayed a mechanism of resistance similar to that of a hypersensitive response. No strong intersectional barriers to hybridization were observed and all interploidy crosses were successful. The chromosome numbers of B. costata (2n = 2x = 28) and B. turkestanica (2n = 2x = 28) are reported here for the first time. The results of this study indicate that the potential exists for the development of insect resistant, ornamental white-barked birch clones through the implementation of a planned, systematic breeding program.

show abstract

“…The seeds had not yet germinated at the time of publication of his report. Johnson and Heimburger (1946) germinated 48 seedlings from their cross of B. papyrifera with B. nigra, which gave a "fair" seed set and "low" germination. Their study involved numerous crosses in many genera, but they provided no criteria to verify any particular interspecific hybrid.…”

Section: Betula Nigramentioning

confidence: 99%

Progress in the Development of Borerresistant White-Barked Birches

Santamour¹

1999

AUF

View full text Add to dashboard Cite

This paper presents a thorough and comprehensive review of the current state of knowledge regarding the hosts of the bronze birch borer (Agrilus anxius) and biochemical and genetics studies designed to identify and develop borer-resistant white-barked birches. Both older and heretofore unpublished observations and experiments are evaluated to provide a framework for future research. Based on the hypothesis that the presence of the chemical rhododendrin in the inner bark of birches is the key to their susceptibility to the borer, the finding that Betula nigra and B.maximowicziana do not contain this compound, and that B. davurica, B. occidentalis, and B. papyrifera have low levels, increased experimentation with these species is encouraged. Some low-rhododendrin, and potentially borer-resistant, hybrids have also been discovered and are awaiting large-scale propagation for long-term trials.

show abstract

Preliminary Report on Interspecific Hybridization in Forest Trees

Cited by 15 publications

References 0 publications

Genetics and Breeding of Black Spruce and Red Spruce

Genetics and Breeding of Black Spruce and Red Spruce

Effectiveness of Interspecific Hybridization for Incorporating Birch Leafminer (Fenusa pusilla) Resistance into White-barked Betula

Progress in the Development of Borerresistant White-Barked Birches

Contact Info

Product

Resources

About