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Poster on the title 'Screening of early maturing chickpea for resistance to Ascochyta blight and Fusarium wilt' by Ojiewo OC, Varshney RK, Gaur PM
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By Ojiewo OC, Kemal S, Tadese N, Bekele D, Eshete M, Odeny DA, Ganga-Rao NVPR, Monyo ES, Gaur PM and Varshney RK
Science with a human faceAbout ICRISAT: www.icrisat.orgICRISAT’s scientific information: http://EXPLOREit.icrisat.org
Oct
ober
201
4
Screening of early maturing chickpea for resistance to Ascochyta blight and Fusarium wilt
Background• Chickpea Ascochyta blight (AB) and Fusarium wilt (FW) can
cause up to 100% loss (Figure 1) • MostICRISAT-derivedvarietiesareresistanttoFW• Onekabulivariety‘Arerti’isresistanttoABbutsusceptible
to FW• There is no AB resistant desi variety in ESA • More than 90% of chickpea produced in ESA are desi types• Farmers are very vulnerable to blight outbreak, leading to
pesticideabuse,increasedcostofproductionandhealthand environmental hazards
Figure 1. A: Sections of desi chickpea field wiped out by AB; B: Sections of kabuli chickpea field attacked by FW at Minjar, Central Ethiopia.
B. Kabuli chickpea
A. Desi chickpeaFigure 2. Screening of chickpeas for wilt resistance in FW sick plot at DZARC, Ethiopia.
Figure 3. Screening & evaluation of chickpeas at Ascochyta blight hot spot area, Alem Tena, Ethiopia.
Results and DiscussionBasedonthisstepwisefieldphenotyping,11lineswhich combine moderate to high level of resistance toABandFWwereidentified(Table1)Theidentifiedresistantbreedinglineswillbeusedtointrogressresistanceintoexistinghighyieldingbutsusceptiblevarietiesusingmarker-assistedbackcrossing techniquesSpecifically,thedesilineICCV96836willbeveryuseful for introgressing AB resistance into desi chickpeavarietiesNewmappingpopulationswillbedevelopedfrom bi-parental crosses for novel resistance gene identification.
Table 1. Selected chickpea lines with resistance to FW and AB.Line Type* Resistance
to FW**Resistance to AB**
FLIP-01-40C K R RFLIP-01-47C K R RFLIP-01-52C K R RFLIP-01-57C K R RFLIP-03-125C K R RFLIP-01-24C K R RMRFLIP-01-58C K MR MRFLIP-92-148C K RMR RMRICCV-96836 D R RICCV-10515 D RMR RICC-4182 D MR R*K = Kabuli; D = Desi**R = Resistant;MR = Moderately resistant;RMR = Resistant to moderately resistant
Materials and Methods• Hundreds of chickpea breeding lines were obtained from
ICARDA and ICRISAT • ThelineswerescreenedforreactiontoFWonasickplot
atDebreZeitAgric.Res.Center(DZARC)(Figure2)• Selected resistant lines were evaluated at major chickpea
growing areas and AB hot spots of Minjar, Dhera and Alem TenaintheCentralRiftValleyofEthiopia(Figure3)
This work has been undertaken as part of the
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