Effect of accumulated resistance genes to Puccinia triticina on transfer of seed proteins

Abstract

Eighteen wheat lines and varieties were classified in four groups according to different reactions to Puccinia triticina isolate of the race 77 at seedlings. Nitrogen distribution from seed, dependent of stored proteins bridge cleaving was presented across RAR (divided root with sum of up ground and root nitrogen content). Varieties expressed highest RT had RAR 0.35 or 0.37 indicating nonspecific genes like were LrTc, Lr 34 or Lr 13 presence or accumulations. The lowest RT of 0;, never present when Lr near isogenic lines were tested at seedlings, characterized three lines with RAR=0.33 fitting combinations of Lr 24 (RAR=0.34), Lr 29 (RAR= 0.34) and Lr 37 RAR=0.33. Lr 1 and 19 were excluded also by previous estimated higher influence on RAR (0.30). Lr 1 or Lr 19 were most probable ingredient in investigated genotypes for ;N RT and RAR of 0.31 as well Lr 24 was for ;N2 (0.34). RAR was decreased for only 0.01 when genes influential on RT decrease were accumulated. According to presented results the S-S linkage was not rejectable for specific resistance to parasite responsible enzymes discovering and differentiation by hydrolytic stability as well as was lower frequented in used parasite isolate.

Keywords

• Lr genes
• proteases
• wheat