Downy Mildew Reaction of Alfalfa Accessions of Different Geographical Origin under Lithuanian Conditions.
In: International Journal of Agriculture & Biology, Jg. 16 (2014-10-31), Heft 5, S. 905-910
academicJournal
Zugriff:
Study was conducted during 2009-2011 under field conditions with natural infection at the Institute of Agriculture located in central part of Lithuania. The alfalfa (Medicago sativa L.) downy mildew (caused by Peronospora trifoliorum) resistance was evaluated on 100 accessions originating from distinct countries across the world. Wet weather conditions were highly favourable for alfalfa downy mildew resistance investigations. Accessions were compared by maximal disease severity (DS) and area under disease progress curve (AUDPC). Disease development was very intensive in 2009 when DS ranged from 8-80% and AUDPC value ranged 140-1938. DS but not AUDPC values was lower in 2010, DS ranged from 6.3-45% and AUDPC ranged 203-2123. The lowest disease development determined in 2011 when DS ranged 1.8-17.5% and AUDPC ranged 40-266. The relatively stable disease development on accessions possessing different resistance was indicated by medium to very strong (r=0.587[*] - 0.932[**]) correlation coefficients between DS and AUDPC across years. Origin of the host accessions showed considerable impact on resistance. According to data of 2009, resistant and medium resistant (DS up to 10 and 20%, respectively) accessions accounted for 7 and 13%, respectively. The majority of the most resistance accessions originated from neighbouring countries characterized by similar to Lithuanian cool temperate climate. © 2014 Friends Science Publishers [ABSTRACT FROM AUTHOR]
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Downy Mildew Reaction of Alfalfa Accessions of Different Geographical Origin under Lithuanian Conditions.
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Autor/in / Beteiligte Person: | Liatukiene, Aurelija ; Liatukas, Žilvinas |
Zeitschrift: | International Journal of Agriculture & Biology, Jg. 16 (2014-10-31), Heft 5, S. 905-910 |
Veröffentlichung: | 2014 |
Medientyp: | academicJournal |
ISSN: | 1560-8530 (print) |
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