Linkage between marker genes on barley chromosome 2 and a gene for resistance to Heterodera avenae

摘要

A close linkage is shown in barley between a gene for resistance to race 1 and 2 of Heterodera avenae (Ha2) and lack of purple colour at nodes, ligules and awns (pau). A number of recombination values between genes are given and a likely order is suggested for the following genes: Ha2, pau, cer g10, v and e, and the translocation break T2–3f. A survey is given of the varieties used and the problems encountered are briefly outlined. The importance for plant breeding is discussed.