Breeding And Identification Of Wheat-Elytrigia Intermedium Hybridization Germplasm Lines

Elytria　intermedium　carries　a　large　of　valuable　genes　for　wheat　improvement.It　is　an　important　way　of　using　these　beneficial　genes　by　creating　alien　addition　lines,substitution　lines　and　translo-cation　lines.　　　In　the　progenies　of　common　wheat　Yannong15×Elytrigia　intermedium,　morphology　,cytogenetics　and　　molecular　genetics　methods　were　used　to　identify　wheat-Elytrigia　intermedium　hybridization　germ　plasm　lines.In　additin,3　different　generations　from　Yannong15×Xiaoyan257　were　analyzed　by　cytogenetics　method.　Their　chromosome　behavior　were　compared　and　the　cultivation　and　identification　of　Wheat-Elytrigia　intermedium　　disomic　addition　lines　were　carried　on　　on　this　basis.　The　main　results　were　as　the　follows:　　1.8　germplasm　lines(line0605,line0607,line0609,line0610,line0611,line0625,line0588,line0629),which　were　obviously　　different　from　their　parents,were　selected　from　59　wheat-Elytrigia　intermedium　hybridization　germplasm　lines　by　using　the　methods　of　morphology,powdery　mildew　resistance　identifications　and　cytology　.　Cytogic　results　showed　that　the　chromosome　configuration　at　PMC　MI　of　line0605,line0607,line0609,line0610,line0611,line0625　were　2n=22Ⅱ;the　chromosome　configuration　at　PMC　MI　of　line0588,line0629　were　2n=21Ⅱ.Morphogy　results　showed　that　they　all　had　different　agronomic　characters　of　their　parents.Results　of　powdery　mildew　resistance　showed　that　line0605　was　immune,　line　0607　was　intermediately　resistant,line0610　and　line0625　were　highly　resistant,line609 ,line0611　and　line0588　were　intermediately...