Exotic barley germplasm : variation and effects on agronomic traits in complex crosses

摘要: Utilization of exotic germplasm offers an approach to broaden genetic variability in breeding populations. This study was conducted order 1) compare origin with adapted Swedish barleys respect differences and 2) evaluate how material affected agronomic performance complex crosses. Allozyme studies showed the following Nei's gene diversities among parents: 0.13 (adapted parents), 0.16 (landraces) 0.25 (H. spontaneum). Cluster analysis indicated that parental groups were genetically divergent. Earliness, straw length, number ears per plant thousand kernel weight (TKW) studied. Variation traits pattern: landraces > H. spontaneum lines. The best sources for earliness parents landraces. Mean length greatest Number quite similar all groups. highest TKW parents. Hybrids from crossing programme exceeded TKW. An index composed four most favorable frequency distributions hybrids. Both indicate new valuable variation may be introduced into barley material.