Naslov
Field screening maize germplasm for resistance and tolerance to Diabrotica virgifera virgifera LeConte in Croatia

Autori
Brkić, Andrija ; Ivezić, Marija ; Brkić, Ivan ; Raspudić, Emilija ; Brmež, Mirjana ; Šimić, Domagoj

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

Izvornik
Proceedings & abstracts of Closing EU-project meeting DIABR-ACT: 'Harmonise the strategies for fighting Diabrotica virgifera virgifera' / Vidal, Stefan - Göttingen, 2008, -----

Skup
Closing EU-project meeting DIABR-ACT: 'Harmonise the strategies for fighting Diabrotica virgifera virgifera'

Mjesto i datum
Göttingen, Njemačka, 25.05.2008. - 29.05.2008

Vrsta sudjelovanja
Poster

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
Western corn rootworm ; resistance ; screening

Sažetak
Developing and releasing of commercial maize hybrids with higher level of host-plant resistance and tolerance would reduce the amount of insecticides and could be a sustainable alternative to transgenic approaches for fighting Diabrotica. As part of resistance breeding program at the Agricultural institute Osijek, Croatia, 127 maize genotypes belonging to various maize gene-pools were screened for reduced root damage (resistance trait) and for increased compensatory root growth (tolerance trait) in 2007. The experiment was conducted in two replications as an alpha design planted at two locations under continuous maize growing conditions in Eastern Croatia, a major maize production area with natural Diabrotica occurrence. For assessing resistance of maize genotypes, the Iowa Node Injury Scale (0-3) was applied, while for assessing tolerance Visual Scale (1-6) was used for compensatory root growth. Across the two locations, maize genotypes varied significantly from 0.4 to 2.4 for root damage and from 1.1 to 6.0 for compensatory root growth indicating feasible genetic variability for both traits. However, there was practically no correlation between the two traits with r=0.10. Based on these results, there is potential to improve maize resistance and tolerance to Diabrotica in Europe although root damage and compensatory root growth are not correlated.

Izvorni jezik
Engleski

Znanstvena područja
Poljoprivreda (agronomija)

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