Donor Lines for Biotic Stress Resistance Breeding

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DTMA photo
A maize crop showing resistance to gray leaf spot (leaf)
and susceptibility to the disease (right).
Picture: George Mahuku/CIMMYT

To identify maize inbred lines with resistance to multiple diseases, a large set of lines from abiotic and biotic breeding programs in CIMMYT and the International Institute for Tropical Agriculture (IITA) were screened for response to the major diseases in different environments in Africa (Kenya and Zimbabwe) and Latin America (Colombia and Mexico). This set of lines was evaluated for their response to maize streak virus (MSV), gray leaf spot (Cercospora maydis), northern corn leaf blight (Exserohilum turcicum) and common rust (Puccinia sorghi) in different years. The evaluation was carried out under both artificially created epidemics and naturally occurring epidemics (disease hot spots).
 

For more information and seed request, please contact George Mahuku ( This e-mail address is being protected from spambots. You need JavaScript enabled to view it ) or Carlos Munoz ( This e-mail address is being protected from spambots. You need JavaScript enabled to view it )

 

Sources of Multiple Disease Resistance  


Mean disease rating on a 1-5 scale
Pedigree AD Gray leaf spot (Cercospora zeae-maydis) Maize streak virus (MSV) Northern corn leaf blight (Exerohilum turcicum) Common rust (Puccinia sorghi) PH (cm) Response to Drought

[(CML395/CML444)-B-4-1-3-1-B/CML395//DTPWC8F31-1-1-2-2]-5-1-2-2-BB 85.6 1.4 1.1 1.7 1.3 121.6 Tolerant
[CML444/CML395//DTPWC8F31-1-1-2-2-BB]-4-2-2-2-2-BB-B 88.0 1.6 1.8 2.5 1.7 134.5 Tolerant
CIMCALI8843/S9243-BB-#-B-5-1-BB-4-3-3 86.2 1.7 1.7 1.8 1.6 114.5 Susceptible
P502SRC0-F2-54-2-3-1-B 86.1 1.7 1.6 1.8 1.5 96.8 Tolerant
CIMCALI8843/S9243-BB-#-B-5-1-BB-4-1-3 86.4 1.7 1.4 1.4 1.3 117.3 Susceptible
[CML444/CML395//DTPWC8F31-1-1-2-2-BB]-4-2-2-2-1-BB-B 84.8 1.8 1.9 2.5 1.2 123.3 Tolerant
[CML312/CML445//[TUXPSEQ]C1F2/P49-SR]F2-45-3-2-1-BBB]-1-2-1-1-2-BBB-B 82.9 1.9 1.1 1.8 1.6 122.1 Tolerant
CIMCALI8843/S9243-BB-#-B-5-1-BB-2-3-3 86.1 1.9 2.3 1.5 1.5 115.6 Susceptible
CIMCALI8843/S9243-BB-#-B-5-1-BB-4-3-4 87.4 1.9 1.6 1.7 1.4 118.9 Tolerant
CML373-BB 87.1 1.9 2.1 2.1 1.7 132.8 Susceptible
[[CML198/ZSR923S4BULK-2-2-X-X-X-X-1-BB]-3-3-1-1-B/CML395//DTPWC8F31-1-1-2-2-BBBB]-4-2-5-1-1-B-2-2-1 86.5 2.0 2.0 1.7 1.4 111.5 Moderate tolerance
[CML144/[CML144/CML395]F2-8sx]-1-2-3-2-B*5 88.2 2.0 2.0 1.7 1.5 115.0 Susceptible
CIMCALI8843/S9243-BB-#-B-5-1-BB-2-3-1 86.9 2.0 2.0 1.5 1.4 120.1 Susceptible
[CML312/[TUXPSEQ]C1F2/P49-SR]F2-45-3-2-1-BB//INTA-F2-192-2-1-1-1-BBBB]-1-5-1-1-2-BB-B 85.9 2.1 1.9 2.2 2.2 132.1 Tolerant
CIMCALI8843/S9243-BB-#-B-5-1-BB-2-3-4 85.7 2.1 1.6 1.7 2.1 112.6 Susceptible
[CML198/ZSR923S4BULK-2-2-X-X-X-X-1-BB]-3-3-1-1-2-B*7 86.4 2.1 2.3 2.1 1.5 120.9 Susceptible
P501SRc0-F2-47-3-2-1-B-B 83.0 2.1 1.7 2.4 1.9 128.4 Tolerant
[GQL5/[GQL5/[MSRXPOOL9]C1F2-205-1(OSU23i)-5-3-X-X-1-BB]F2-4sx]-11-3-1-1-B*5 89.4 2.2 2.1 2.4 2.5 105.0 Susceptible
[CML312/CML445//[TUXPSEQ]C1F2/P49-SR]F2-45-3-2-1-BBB]-1-2-1-1-1-BBB-B 79.5 2.2 1.6 1.8 1.2 145.1 Tolerant
CIMCALI8843/S9243-BB-#-B-5-1-BB-2-3-2 85.3 2.2 1.5 1.9 2.3 110.2 Susceptible
CML311/MBR C3 Bc F112-1-1-1-B-B-B-B-B 87.5 2.2 2.4 2.5 1.6 100.7 Susceptible
La Posta Sequia C7-F33-1-2-1-B-B 87.7 2.3 2.2 2.0 1.6 Susceptible
[CML-384 X CML-176]F3-107-3-1-1-B-B-B 88.2 2.3 2.5 1.9 1.7 135.7 Susceptible
[[CML198/ZSR923S4BULK-2-2-X-X-X-X-1-BB]-3-3-1-1-B/CML395//DTPWC8F31-1-1-2-2-BBBB]-4-2-5-1-1-B-2-2-2 84.9 2.3 1.4 1.9 1.8 119.9 Moderate tolerance
00SADVEA-#-28-1-2-1-1-1-2-3 84.7 2.3 1.1 1.9 1.6 123.8 Susceptible
La Posta Seq C7-F31-2-1-1-2-B-B-B 87.3 2.4 1.8 2.5 2.1 109.1 Susceptible
La Posta Seq C7-F153-1-1-1-2-B-B-B 85.8 2.5 2.3 2.3 2.4 130.7 Tolerant
Gmean 98.1 2.7 2.8 2.9 2.3
Ventry 27.2 0.3 0.2 4.9 0.5
V loc x entry 15.0 0.4 0.1 0.2 0.3
Vres 25.3 0.2 0.8 0.6 0.3
heritability 0.9 0.8 0.6 1.0 0.9
LSD (5%) 7.0 0.9 2.5 0.8 0.9
CV (%) 3.6 16.6 32.9 14.7 20.4
Number of locations 5 6 3 17 5

Disease rating scale: 1 = no disease; 5 = severely diseased       
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