Environmental effect on genetic variability of spring barley traits important for organic farming in association mapping population | Vides ietekme uz bioloģiskajā lauksaimniecībā nozīmīgu vasaras miežu pazīmju ģenētisko mainību asociāciju kartēšanas populācijā
2015
Mezaka, I., State Priekuli Plant Breeding Inst., Priekuļi, Priekuļi parish, Priekuļi Municipality (Latvia) | Legzdina, L., State Priekuli Plant Breeding Inst., Priekuļi, Priekuļi parish, Priekuļi Municipality (Latvia) | Kokare, A., State Priekuli Plant Breeding Inst., Priekuļi, Priekuļi parish, Priekuļi Municipality (Latvia) | Locmele, I., State Priekuli Plant Breeding Inst., Priekuļi, Priekuļi parish, Priekuļi Municipality (Latvia) | Rostoks, N., University of Latvia, Riga (Latvia). Faculty of Biology
In organic farming options for fertilisation, pest, disease and weed control are limited, therefore special attention needs to be paid to select varieties with good resistance to biotic and abiotic stresses, competitive ability with weeds and nutrient use efficiency. The aim of the study was to characterise traits relevant to organic farming and map loci contributing to these traits. We employed association mapping using 153 spring barley genotypes that were grown in two organically and two conventionally managed fields during three consecutive years (2010–2012). In total 27 traits were phenotyped, out of these, nine yielded significant marker-trait results. Seven of these traits were analysed in this study in terms of average values across environments and ratio of genotype to genotype × environment effects. In both conventional and organic sites trait heading date had least variance and was more influenced by genetic factors. 125 marker-trait associations were mapped.
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