Naslov
Low varroa mite reproduction in European honey bees

Autori
Büchler, Ralph ; Bienkowska, Malgorzota ; Cauia, Emily ; Costa, Cecilia ; Dahle, Bjorn ; Kretavicius, Justinias ; Kovačić, Marin ; Kryger, Per ; Lima, Alice ; Mondet, Fanny ; Panasiuk, Beata ; Parejo, Melanie ; Pinto, Alice ; Wilde, Jerzy

Vrsta, podvrsta i kategorija rada
Sažeci sa skupova, sažetak, znanstveni

Izvornik
Book of abstracts - Eurbee 7 / Dezmirean, Daniesl S - Cluj-Napoca : Academic Press, 2016, 129-130

ISBN
978-973-744-536-0

Skup
European conference of apidology

Mjesto i datum
Cluj-Napoca, Rumunjska, 07.09.2016. - 09.09.2016

Vrsta sudjelovanja
Predavanje

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
Varroa destructor ; reproduction

Sažetak
In European honey bees usually 5-20% of the Varroa mites remain infertile after invading worker brood cells. However, Harbo and Harris identified high levels of non- reproduction as an inherited character of colonies selected for Varroa resistance. Increased proportions of non-reproducing mites (40 – 50%) have also been shown as a significant trait of some naturally selected mite resistant A. mellifera populations in Europe. However, the distribution and variability of this interesting resistance trait in different European subspecies has not yet been studied.In order to investigate the distribution and variability of suppression of mite reproduction (SMR) in European honey bees, infested worker brood containing pupae shortly before emergence were sampled from 335 colonies during July to September 2015. The samples were collected in Croatia, Denmark, France, Germany, Italy, Lithuania, Moldavia, Norway, Poland, Portugal, Romania and Switzerland and represent several subspecies and local hybrids. The brood cells were individually checked for the age of pupae, mite infestation and offspring stages. Single infested brood cells 7-9 days post capping without at least one female deutonymph and one male, and brood cells 10-12 days post capping without at least one adult daughter mite and one adult male were counted as non- reproductive.On average 28 single infested cells could be evaluated per sample. The rate of non reproductive mites ranged between 0 – 100% with an average of 35.9%. Of those, 28.6% showed no reproduction at all, 48.7% had only offspring stages that were too young, and 31.1% were without male offspring. Significant differences between genotypes encourage further selection for this trait.

Izvorni jezik
Engleski

Znanstvena područja
Poljoprivreda (agronomija)

POVEZANOST RADA