Results of the First Controlled Crosses in European Chestnut in the Slovak Republic

Bolvanský, M.; Mendel, Ľubomí­r

doi:10.17660/actahortic.1999.494.46

Cited by 1 publication

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“…Controlled pollination was performed by placing a paper bag over the female flowers prior to flowering. Bags were removed when the female flowers were receptive and camel hair brushes were used to apply pollen (Bolvanský & Mendel, 1999). Bags were replaced over the flowers for continued protection from other pollen.…”

Section: Plant Materialsmentioning

confidence: 99%

“…Although European chestnut showed reproductively sustainable growth in Slovakia for many centuries, it is still a neglected fruit species and no extensive breeding programme currently exists. The only successful hybridization of chestnut in Slovakia was carried out in the early 1980s when interspecific hybrids of C. sativa × C. crenata were obtained (Bolvanský & Mendel, 1999, 2001. However, several years elapsed before these hybrids were finally subjected to a first screening for resistance to chestnut blight on excised stems (Bolvanský, Adamčíková, & Kobza, 2014).…”

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confidence: 99%

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Screening for resistance of progenies derived from Castanea sativa × C. crenata and C. crenata to Cryphonectria parasitica

2018

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Summary The possibility of screening young seedlings of Castanea for chestnut blight resistance was examined to try to shorten time needed for a breeding programme. Two‐year‐old chestnut seedlings of eight progenies, derived from open and controlled pollination of three hybrids (Castanea sativa × C. crenata and a C. crenata tree by paternal tree of C. sativa) were screened for resistance to chestnut blight. One hybrid and a C. crenata were partially susceptible, and two hybrids were partially resistant to chestnut blight. A total of 179 seedlings were inoculated with two virulent and one hypovirulent strain of Cryphonectria parasitica at two dates (early June and early September). Stromata production was higher and canker size larger when seedlings were inoculated in early June. Differences in canker size among seedlings derived from different parental trees were observed only after September inoculation. However, differences in canker size among seedlings inoculated with the virulent strains were observed only after June inoculation. The only significant effect on seedling survival was based on fungal strains used for inoculation. Ratio of seedlings, which died after inoculation with the hypovirulent strain, was significantly lower (36.8%) than those that died after inoculation with virulent strains (88.4 and 95.1%). Survival of seedlings was affected only by fungal strains used in inoculation, and not influenced by parental trees. The risk of seedling dieback increased with increasing canker size and with decreasing stem diameter of seedlings.

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Section: Plant Materialsmentioning

confidence: 99%

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confidence: 99%