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Improvement of barely to BYDV by using innovative breeding strategies – Subproject 2

Project


Project code: 2814501910
Contract period: 01.07.2011 - 30.06.2015
Budget: 259,714 Euro
Purpose of research: Experimental development

Is expected that barley yellow dwarf virus (BYDV) will become increasingly important in cereal crops since with a warming climate, virus vectors as well as novel virus strains are likely to spread across northern parts of Europe.The resistance factor Ryd4Hb confers complete resistance to BYDV and possibly to its aphidic vectors. Ryd4Hb shall be transferred to German barley breeding lines and combined with resistance to barley mild mosaic virus as well as malting quality. The project aims at identifying homozygous resistant genotypes carrying Ryd4Hb, developing mapping populations with reduced H. bulbosum donor-chromosomal segments, and establishing molecular markers closley linked to resistance. Additionally, field trials will be performed to assesss yield and malting quality. This pre-breeding project aimed at introducing the BYDV-resistance gene Ryd4Hb from Hordeum bulbosum (Hb) into German barley -breeding programmes . Ryd4Hb is highly effective , causing true resistance to BYDV. The original Hb introgression carrying Ryd4Hb was associated with severe linkage drag due to a recessive subletality factor, which prevented its use in practical platt breeding. With the aid ofmolecular markers we succeeded in finding a rare recombinant offspring plant devoid of linkage drag, which proved suitable tobe used as a Ryd4Hb donor in breeding programme s. As a result, a milestone could be achieved to ensure sustainable barley production in the face of climate change.

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Subjects

Associated projects: Collaborative project: Improvement of barely to BYDV by using innovative breeding strategies

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