Analysis of seed yield components in oilseed Brassicas

Abstract

Brassicaceae family comprises over 300 genera with more than 3,000 species. Cultivated species have a high economic value as vegetable crops, oil crops and crops for the feedstock production. The investigation carried out encompassed two spring and two winter rapeseed (Brassica napus) cultivars, two kale (Brassica oleracea var. viridis) and two white mustard (Sinapis alba) cultivars. All varieties were sown in autumn and spring. Over-wintering was observed, as well as, the plant height, number of branches, 1000-seed weight, seed yield per plant and oil content. White mustard did not over-winter when sown in autumn. Species of the Brassica genus, spring varieties, had higher seed yields in autumn, compared with the spring sowing period. Differences were also noticed for the other traits. Correlations between seed yield components and the oil content, the path coefficient and the coefficient of determination were discussed in this paper.

Gajene vrste iz porodice Brassicaceae imaju veliki ekonomski značaj. U istraživanja su uključene dve sorte ozime uljane repice i dve sorte jare uljane repice (Brassica napus L.), dve sorte stočnog kelja (Brassica oleracea var. viridis) i dve sorte bele slačice (Sinapis alba L. subsp. alba syn. Brassica hirta). Ogled je postavljen u jesenjem i prolećnom roku setve sa svim vrstama. Praćeno je prezimljavanje i merena visina biljke, broj grana, masa 1000 semena, kao i prinos semena po biljci i sadržaj ulja u semenu. Bela slačica je izmrzla u jesenjem roku setve. Vrste iz roda Brassica, ozime forme nisu cvetale u prolećnom roku, a jare forme su dale viši prinos u jesenjem, nego u prolećnom roku setve. I za druga svojstva evidentirane su značajne razlike. U radu su diskutovane korelacije komponenti prinosa i sadržaja ulja, odnosno posmatran je uticaj ovih komponenti na prinos kroz analizu koeficijent putanje (path coefficient analysis) i koeficijent determinacije.