Suitability of A European Nuclear Collection of Brassica oleracea L. Landraces to Grow at High Temperatures

• Published in: Journal of agronomy and crop science (1986) 2014-06, Vol.200 (3), p.183-190
• Main Authors: Rodríguez, V. M, Soengas, P, Cartea, E, Sotelo, T, Velasco, P
• Format: Article
• Language: English
• Subjects: Adaptation to environment and cultivation conditions; Agronomy. Soil science and plant productions; Biological and medical sciences; biomass; Brassica; Brassica oleracea; cabbage; chlorophyll; climate change; cluster analysis; crop yield; crops; early development; European nuclear collection and heat tolerance; Fundamental and applied biological sciences. Psychology; Genetics and breeding of economic plants; global warming; glucosinolates; heat tolerance; landraces; statistical models; temperature; Varietal selection. Specialized plant breeding, plant breeding aims; vigor
• ISSN: 0931-2250; 1439-037X
• DOI: 10.1111/jac.12048

Statistical models predict that global warming will have a negative impact in crop yields in the next decades. Especially vulnerable are winter crops such as kales or cabbages (Brassica oleracea L.). We evaluated the impact of high temperatures in morphological and biochemical traits of a B. oleracea core collection during early development. When grown at 30 °C, plants showed a reduction in chlorophyll content, early vigour and biomass compared with values observed on plants grown at 20 °C. Likewise, the total content of glucosinolates shows a reduction at high temperatures. The alboglabra group showed the best general performance at 30 °C for both morphological traits and glucosinolate content. Based on a cluster analysis, we selected four populations (MBG0072, MBG0464, MBG0535 and HRIGRU5555) as the most promising to be used in further breeding programs for heat tolerance.