Selection of winter wheat for organic growing

Ž. Liatukas and A. Leistrumaitė

Lithuanian Institute of Agriculture, Instituto al. 1, Akademija, Kėdainiai distr., LT-58344,Lithuania; e-mail: alge@lzi.lt

Abstract:

The study was conducted at the Lithuanian Institute of Agriculture during 2006–2008. Sixteen registered winter wheat varieties and advanced breeding lines were tested. Correlation analysis of traits of winter wheat genotypes grown under conventional and organic systems showed stronger correlations between the traits that had been found to be environmentally more stable. Overwintering, plant height, heading, maturity, lodging and hectolitre weight strongly correlated (r = 0.74**–0.98**) between the growing systems in both years. Soil coverage, which is a very important trait for organic system showed weak or medium correlations (r = 0.43*–0.64**) between the systems tested. Yield and 1000 grain weight mostly correlated with the traits of plant vegetative development, whereas hectolitre weight showed random correlations with the other traits. The yield was found to positively correlate with soil coverage at development stages BBCH41-42, 60-65 and number of productive tillers (r = 0.31*–0.54*).

Key words:

breeding lines, cultivars, organic farming, winter wheat

The spring cereals traits of soil cover, disease resistance and yielding essential for organic growing

A. Leistrumaitė, Ž. Liatukas and K. Razbadauskienė

Lithuanian Institute of Agriculture, Instituto al. 1, Akademija, Kėdainiai distr., LT-58344,Lithuania; e-mail: alge@lzi.lt

Abstract:

Investigation on 12 spring barley and 7 oat genotypes under organic growing system during 2007–2008 revealed that mean yield of oats was 3.3 t ha-1, whereas barley yielded on average 2.3 t ha-1. Also, oats were found to be more resistant to leaf diseases. Oats were severely infected by leaf rust in 2007, but the disease did not correlate (r = –0.17) with yield. The majority of barley genotypes were infected with powdery mildew in both years and with leaf spotting diseases in 2007. Leaf spotting diseases negatively influenced (r = –0.53*) yield. Oats possessing higher vegetative growth rate, higher plant height, large and prostrate leaves, and larger stems were superior to barley by canopy traits during the growing season.

Key words: