Induced mutants of Cox's Orange Pippin apple with increased self-compatibility. 1. Production and selection

Campbell, A. I.; Lacey, C. N. D.

doi:10.1007/bf00021665

Cited by 11 publications

(5 citation statements)

References 6 publications

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“…Unfortunately the heavy set on the controls masked most clonal differences after June, but initial set records on whole trees and hand pollinated clusters indicate that most of the clones (2,3,4,5,7,8,9,10,11) are likely to set more fruit than usual with Cox pollen. This confirms the earlier crop records (CAMPBELL & LACEY, 1982). Clones 1 and 6, however, gave the same set counts as the control and may only have cropped more heavily in previous trials because they were on the edge of the plot or if the possible mutation was unstable.…”

Section: Resultssupporting

confidence: 83%

“…Where both pollen and stylar self-incompatibility have been altered this could arise from either one or two separate mutations. It is also possible that the screening techniques used by CAMPBELL & LACEY (1982) detected natural rather than gamma-irradiation-induced mutants.…”

Section: Resultsmentioning

confidence: 99%

“…A clone of Cox able to fruit without pollen from other cultivars might yield more regular and heavier crops, and also eliminate the need for pollinator trees which often take up valuable space and complicate orchard management. CAMPBELL & LACEY (1982) described the cropping of MV2 generation trees derived from gamma-irradiated scions of Cox. Twelve out of over 7000 of these cropped well in an orchard isolated from the pollen of other cultivars.…”

Section: Introductionmentioning

confidence: 99%

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Induced mutants of Cox's Orange Pippin apple with apparent increased self-compatibility. 2. Laboratory and orchard assessment and testing

1982

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Section: Resultssupporting

confidence: 83%

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Induced mutants of Cox's Orange Pippin apple with apparent increased self-compatibility. 2. Laboratory and orchard assessment and testing

1982

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“…In contrast, the use of chemical mutagens has been found to be inefficient (Broertjes, 1977;Broertjes andVan Harten, 1985, 1988;Lapins, 1983;Van Harten and Broertjes, 1989). A list of desirable traits that have been produced in various commercial tree cultivars through induced mutations is presented in Table 2 (Brown, 1975;Campbell and Lacey, 1982;Campbell and Wilson, 1977;Coutinho, 1975;Dayton, 1959Dayton, , 1969Hansche, 1988;Hearn, 1984;Hensz, 1971;Lapins, 1971;Mau et al, 1982;McIntosh and Lapins, 1966;Sanada et al, 1988;Spiegel-Roy, 1990;Tobutt, 1984;Vardi and Spiegel-Roy, 1988) Radiation has been found to induce many nonlethal chromosome aberrations. Gamma radiation induces mainly recessive deletion mutations (Brock, 1979).…”

Section: Mutation Breedingmentioning

confidence: 99%

Induction of Seedlessness in Citrus: From Classical Techniques to Emerging Biotechnological Approaches

Vardi¹,

Levin²,

Carmi³

2008

J. Amer. Soc. Hort. Sci.

102

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Seedlessness can be obtained through parthenocarpy (i.e., fruit formation without fertilization or embryo abortion). In practice, the actual reduction in seed number in parthenocarpic plants is often exaggerated by coupling parthenocarpy with self-incompatibility or male sterility. Traits related to seedlessness, such as parthenocarpy, can be introduced into genetic accessions through conventional cross-breeding. However, conventional breeding in Citrus L. species faces several limitations. First, these species have long juvenile (nonflowering) periods during which a relatively thick canopy develops, which limits the size of seedling populations that can be maintained for further evaluation. Second, they have a narrow genetic base, which limits the availability of alternative alleles that could be introgressed into other lines for the formation of a particular phenotype such as parthenocarpy. Third, breeding efforts are limited by the lack of knowledge of the mode of inheritance of specific characteristics. Fourth, and last, breeding efforts are limited by the polygenic nature of many important traits. Despite these limitations, conventional breeding in fruit trees has yielded improved cultivars and will most likely continue to be a very important strategy. However, emerging biotechnological approaches should be continuously evaluated for their potential for expediting such breeding efforts. The objective of this review is to present, evaluate, and discuss conventional and emerging biotechnological approaches for the induction and maintenance of seedlessness in a variety of crops. Particular attention will be paid to citrus crops, including the presentation and discussion of some preliminary data on the genetic inheritance of parthenocarpy.

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“…Table 5 in the Appendix shows the parentage of the progenies studied. Progeny F63 (Cox self fertile clones sel fed) includes the self fertile clones 4, 7, 8 and 9 (Campbell and Lacey, 1982).…”

Section: Experimental Approachmentioning

confidence: 99%

Isoenzymes as Genetic Markers in Apple Breeding

Μαγκαναρησ¹

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8incompatibility S gene 16.3.3 Linkage of genes for resistance to scab and mildew with isoenzymic genes 16.3.4 Linkage of the pale green lethal gene 1 with ENP-1 and ACP-1 16.3.5 Linkage between genes for resistance to aphids and isoenzymic genes 16.4 Discussion 324 CHAPTER 17: IDENTIFICATION OF APPLES BY ISOENZYME ANALYSIS 17.1 -36-Φ •ο ο ι. S-+• > φ ο « φ •• UJ jO Φ co σ> Ε" 'ι-.ν ο

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Induced mutants of Cox's Orange Pippin apple with increased self-compatibility. 1. Production and selection

Cited by 11 publications

References 6 publications

Induced mutants of Cox's Orange Pippin apple with apparent increased self-compatibility. 2. Laboratory and orchard assessment and testing

Induced mutants of Cox's Orange Pippin apple with apparent increased self-compatibility. 2. Laboratory and orchard assessment and testing

Induction of Seedlessness in Citrus: From Classical Techniques to Emerging Biotechnological Approaches

Isoenzymes as Genetic Markers in Apple Breeding

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