作者: Inger Åhman , Stine Tuvesson , Maj Johansson
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摘要: Accessions of cultivated barley (Hordeum vulgare ssp. vulgare) and its wild progenitor Hordeum spontaneum (H. spont.) were screened for gramine content at the seedling stage. H. spont. generally had higher concentration compared with spring barley. Thus concentrations might be raised in modern through crossings selected accessions repeated back-crossings (BC) offspring to In present study, cultivar Lina was used as recurrent parent. exceptional among two-rowed barleys that it contained moderate levels gramine, whereas most others very low gramine. Chromosome-doubled haploid lines (DHs) from first generation (F1) a skewed distribution towards so back-cross (BC1F1-DHs). A hairy plant surface, another character proposed confer resistance aphids, also found some plants breeding material. BC1F1-DHs high proportion genome, determined an analysis PCR-based molecular markers, addition bases two cases tested pest Rhopalosiphum padi. However, based on aphid performance preference tests, there no indications either or hairiness conferred R. padi when variety (Golf). The pattern same F1 evaluated tests along Lina, Golf, six parents. Aphid weight consistently only one Since previous reports positive relationship between studies Chile Japan, Chilean population three Swedish populations, but responses all four populations similar.