Liucernų atsparumas vėžiui

Abstract

Lietuvos žemdirbystės institute 2008–2010 m. lauko ir laboratoriniais metodais tirtas 31 liucernos (Medicago spp.) veislės atsparumas vėžiui. Rezultatai, gauti laboratoriniais tyrimo metodais, tarpusavyje labai koreliavo. Buvo palygintas sėklų daigumas, naudojant oksalo rūgšties vandeninį tirpalą (koncentracija 30 mM) ir daiginant jas ant Sclerotinia trifoliorum grybienos, ir nustatyta stipri koreliacija (r = 0,774*, P < 0,01). Lyginant laboratorinius atsparumo nustatymo metodus su lauko tyrimu, taip pat gautos stiprios koreliacijos. Tarp sėklų dygimo ant S. trifoliorum grybienos ir liucernų atsparumo lauke nustatyta r = 0,842*, o tarp sėklų dygimo naudojant 30 mM koncentracijos oksalo rūgštį ir liucernos atsparumo lauke – r = 0,906*. Patvirtinta galimybė atrinkti atsparią liucernos medžiagą per trumpą laiką, naudojant itin paprastas priemones, kurios pagreitina liucernų atsparumo selekciją.

The Sclerotinia crown and stem rot resistance of 31 cultivars of lucerne (Medicago spp.) were investigated in the field and laboratory experiments at the Institute of Agriculture in 2008-2010. Results obtained by laboratory methods strongly correlated. The strong correlation (r = 0.774*, P < 0.01) was calculated between seed germination test with water solution of oxalic acid (concentration 30 mM) and seed germination on the mycelium of Sclerotinia trifoliorum. Strong correlations also were calculated between results of laboratory tests and field experiment. Correlation coefficient r = 0.906* was calculated between seed germination test with water solution of oxalic acid and lucerne resistance in the field. Correlation coefficient r = 0,842* was calculated between seed germination on mycelium of S. trifoliorum and lucerne resistance in the field. Confirmed possibility to select resistant lucerne material during short time with small inputs should promote lucerne Sclerotinia crown and stem rot resistance breeding.