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95-24Multi-Environment Quantitative Trait Loci Analysis for Resistance to Stripe Rust and Cephalosporium Stripe in Two Recombinant Inbred Line Populations.
See more from this Division: C01 Crop Breeding & GeneticsSee more from this Session: Div. C01 Graduate Student Poster Competition
Monday, October 22, 2012
Duke Energy Convention Center, Exhibit Hall AB, Level 1
˙ūS t r i p e r u s t ( P u c c i n i a s t r i i f o r m i s ) a n d C e p h a l o s p o r i u m s t r i p e ( C e p h a l o s p o r i u m g r a m i n e u m ) c a n c a u s e s e v e r e y i e l d a n d g r a i n q u a l i t y l o s s o f w h e a t ( T r i t i c u m a e s t i v u m L . ) i n t h e P a c i f i c N o r t h w e s t , U S A . F a v o r a b l e w e a t h e r c o n d i t i o n s a n d t h e a p p e a r a n c e o f n e w r a c e s a r e b e c o m i n g a n i m p o r t a n t f a c t o r f o r a n n u a l d e v e l o p m e n t o f s t r i p e r u s t d i s e a s e i n t h e r e g i o n . C e p h a l o s p o r i u m s t r i p e c a n b e a l i m i t i n g f a c t o r i n t h e a d o p t i o n o f c o n s e r v a t i o n t i l l a g e p r a c t i c e s a n d l i t t l e i s k n o w n a b o u t t h e i n h e r i t a n c e o f r e s i s t a n c e . T w o r e c o m b i n a n t i n b r e d l i n e s ( R I L s ) p o p u l a t i o n s ( E i n s t e i n x T u b b s a n d T u b b s x N S A 9 5 - 0 9 9 5 ) w e r e a s s e s s e d f o r q u a n t i t a t i v e t r a i t l o c i ( Q T L ) a n a l y s i s t o s t r i p e r u s t a n d C e p h a l o s p o r i u m s t r i p e . A l i n k a g e m a p w a s c r e a t e d f o r e a c h p o p u l a t i o n b a s e d o n d i v e r s i t y a r r a y t e c h n o l o g y ( D A r T ) a n d s i m p l e s e q u e n c e r e p e a t ( S S R ) m a r k e r s . F i e l d s c r e e n i n g s f o r s t r i p e r u s t o n b o t h p o p u l a t i o n s w e r e d o n e i n s i x e n v i r o n m e n t s u n d e r n a t u r a l i n o c u l a t i o n . F i e l d s c r e e n i n g s f o r C e p h a l o s p o r i u m s t r i p e u n d e r a r t i f i c i a l l y i n o c u l a t e d c o n d i t i o n s a n d b a s e d o n w h i t e h e a d s ( s t e r i l e h e a d s c a u s e d b y p a t h o g e n i n f e c t i o n ) w e r e d o n e i n f o u r e n v i r o n m e n t s f o r t h e E i n s t e i n x T u b b s p o p u l a t i o n a n d i n t h r e e e n v i r o n m e n t s f o r t h e T u b b s x N S A 9 5 - 0 9 9 5 p o p u l a t i o n . R e s u l t s f r o m t h e Q T L a n a l y s i s i d e n t i f i e d c o m m o n r e g i o n s a s s o c i a t e d w i t h r e s i s t a n c e t o s t r i p e r u s t a n d C e p h a l o s p o r i u m s t r i p e . I n a d d i t i o n , a s o c i a t i o n m a p p i n g i n 6 4 l i n e s f r o m t h e P a c i f i c N o r t h w e s t U S A i s p e r f o r m e d t o v a l i d a t e r e s u l t s f r o m t h e Q T L a n a l y s i s .
See more from this Division: C01 Crop Breeding & GeneticsSee more from this Session: Div. C01 Graduate Student Poster Competition