Cal double dagger ots are the immature floral stems of second-year resprouts of the 'Blanca Tardana de Lleida' (BTL) onion landrace, and to date, breeding has used only a few populations. So, we aimed to increase our knowledge of the variability of BTL and to explore its characteristics and genetic dissimilarity with other varieties that might be used in cal double dagger ot breeding programs. We analyzed the agronomic and morphological traits of four populations of BTL, two synthetic varieties of BTL, 20 prestigious Spanish landraces, and 4 exotic onion landraces. Furthermore, we used three combinations of AFLP primers and seven microsatellites to analyze their genetic background. The Spanish landraces (including BTL) shared a large part of their genetic background, which showed considerable variability (heterozygosity around 0.5). Morphological traits also had high variability, so multiple breeding strategies can be used, ranging from intravarietal selection to crossings between populations to take advantage of the heterosis, both for the bulb and for the cal double dagger ot improvement.
Dry beans (Phaseolus vulgaris L.) are a rich source of protein, carbohydrate, dietary fiber, and minerals. Seed chemical composition can play an important role in the sensory perception of bean seeds after cooking. Understanding the inheritance of seed chemical composition would provide essential tools to improve nutritive value and/or sensory traits. Quantitative trait loci (QTL) affecting seed coat content of dietary fiber, uronic acid, calcium, magnesium, and ash, as well as cotyledon contents of protein, starch, amylose, and apparent amylose, were mapped in a recombinant inbred line population derived from the cross Xana/Cornell 49242.
Ferreira, J.; Romero Del Castillo, M.; Pérez-Vega, E.; Plans, M.; Simo, J.; Casañas, F. Euphytica Vol. 186, num. 3, p. 687-696 DOI: 10.1007/s10681-011-0540-9 Data de publicació: 2012-07-01 Article en revista