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College of Agriculture and Life Sciences

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College of Agriculture and Life Sciences. Department of Plant Breeding ... Self pollinate and. screen for ASR resistance. Testcross to monitor. yield and adaptation ... – PowerPoint PPT presentation

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Title: College of Agriculture and Life Sciences


1
Anthracnose Stalk Rot Resistancefrom GEM
Germplasm
  • Margaret Smith
  • Department of Plant Breeding
  • Cornell University

2
Anthracnose Stalk Rot
  • Colletotrichum graminicola (Ces.) G.W. Wils.
  • Increased lodging, reduced yield
  • Best control through resistant varieties
  • Limited resistance in temperate germplasm

3
Overall Project Objective
  • Develop temperate-adapted maize inbreds
  • with both anthracnose stalk rot resistance and
  • good yield potential
  • from GEM breeding populations

4
Selection and Breeding Scheme
Evaluate 30 populations for ASR resistance
Testcross and evaluate yield potential and
adaptation
Self pollinate and screen for ASR resistance
Testcross to monitor yield and adaptation
5
Selected Populations
  1. FS8B(T)N1802
  2. CH04030S0906
  3. AR01150N0406
  4. GOQUEENN1603

6
Means by source population for anthracnose stalk
rot ratings, 2001
7
Yield Data - 2 locations, 2001
8
Yield Data - 1 location, 2001
9
Work done in 2002
  • S6 progenies planted ear-to-row
  • Greater emphasis on yield performance
  • Greater tolerance of stalk rot resistance
  • Testcrosses made to
  • Previously used public line crosses
  • Holdens testers (LH176/LH177, LH198)

10
Anthracnose Stalk Rot Resistance in a Few GEM
Inbreds, 2002
11
FS8B(T)N1802 15-255
DE811ASR B37
12
FS8B(T)N1802 15-255
DE811ASR B37
13
Yields of a Few GEM Inbreds Tested on B73/CD1,
2001, 2002
14
Work done in 2003
  • S6 progenies and their testcrosses (public and
    Holdens testers) evaluated for anthracnose stalk
    rot resistance (2 reps)
  • Testcrosses evaluated in yield trials in 3 New
    York locations (2 reps/location)
  • Results just in from the field -- stay tuned!

15
Thank you!
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