Resistance to beet armyworm in a chickpea recombinant inbred line population

Clement, S L and Sharma, H C and Muehlbauer, F J and Elberson, L R and Mattinson, D S and Fellman, J K (2010) Resistance to beet armyworm in a chickpea recombinant inbred line population. Journal of Applied Entomology, 134 (1). pp. 1-8. ISSN 1439-0418

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Beet armyworm, Spodoptera exigua (Hübner), is an economic pest of chickpea, Cicer arietinum L., in Mexico and the Indian subcontinent. Larvae feed on the vegetative and reproductive stages of chickpea and the development of plant resistance is a priority in the management of this pest. Forty-two recombinant inbred lines (RILs) from a chickpea recombinant inbred line population (CRIL-7) developed from a cross between FLIP 84-92C (susceptible C. arietinum) and PI 599072 (resistant C. reticulatum Lad. accession) were rated resistant (nine lines with post-trial larval weights 0.42–0.59 mg), moderately resistant/susceptible (25 lines, larval weights 0.61–0.99 mg) and susceptible (eight lines, larval weights 1.01–2.17 mg) to beet armyworm larvae in a general glasshouse screening. Resistance and susceptibility of entries (RILs in the CRIL-7 population, parents, checks) was based on the average weight gain and fate of early-stage larvae on pre-flowering plants. In a growth chamber trial, early-instar larval weight gain differed significantly (P < 0.0001) among entries (12 RILs, parents, checks), with mean weights from 0.80 mg (resistant RIL) to 4.03 mg (susceptible kabuli cultivar). There were no significant differences (P = 0.0836) in larval mortality among the entries in the growth chamber trial, although mortality rates were 28.2–61.9%. Flavonoid and isoflavonoid extractions and analyses did not clarify the role played by these phytochemicals in chickpea resistance to S. exigua. The requisite high levels of resistance to S. exigua and other pests for breeding resistant culivars may reside in the CRIL-7 population

Item Type: Article
Uncontrolled Keywords: Spodoptera exigua, chickpea, chickpea recombinant inbred line population, host plant resistance, isoflavonoids
Subjects: Mandate crops > Chickpea
Depositing User: Mr Sanat Kumar Behera
Date Deposited: 07 Oct 2011 07:56
Last Modified: 07 Oct 2011 07:56
Official URL:
Acknowledgement: UNSPECIFIED
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