Variation in inheritance of resistance to sorghum midge, Stenodiplosis sorghicola across locations in India and Kenya.

Sharma, H C and Mukuru, S Z and Stenhouse, J W (2004) Variation in inheritance of resistance to sorghum midge, Stenodiplosis sorghicola across locations in India and Kenya. Euphytica, 138 (3). pp. 219-225. ISSN 0014-2336

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Abstract

Sorghum midge [Stenodiplosis sorghicola (Coquillett)] is an important pest of grain sorghum, and host plant resistance is one of the important components for the management of this pest. We studied the inheritance of resistance to this insect involving a diverse array of midge-resistant and midge-susceptible genotypes in India and Kenya. Testers IS 15107, TAM 2566, and DJ 6514, which were highly resistant to sorghum midge in India, showed a greater susceptibility to this insect in Kenya. The maintainer lines ICSB 88019 and ICSB 88020 were highly resistant to sorghum midge in India, but showed a susceptible reaction in Kenya; while ICSB 42 was susceptible at both the locations. General combining ability (GCA) effects for susceptibility to sorghum midge for ICSA 88019 and ICSA 88020 were significant and negative in India, but such effects were non-significant in Kenya. The GCA effects of ICSB 42 for susceptibility to sorghum midge were significant and positive at both the locations. The GCA effects were significant and positive for Swarna, and such effects for IS 15107 and TAM 2566 were negative at both the locations. GCA effect of DJ 6514 were significant and negative in India, but non-significant and positive in Kenya; while those of AF 28 were significant and positive during the 1994 season in India, but significant and negative in Kenya. Inheritance of resistance to sorghum midge is largely governed by additive type of gene action. Testers showing resistance to sorghum midge in India and/or Kenya did not combine with ICSA 88019 and ICSA 88020 to produce midge-resistant hybrids in Kenya. Therefore, it is essential to transfer location specific resistance into both parents to produce midge-resistant hybrids.

Item Type:	Article
Divisions:	UNSPECIFIED
CRP:	UNSPECIFIED
Uncontrolled Keywords:	host plant resistance, inheritance of resistance, sorghum, sorghum midge, Stenodiplosis sorghicola
Subjects:	Mandate crops > Sorghum
Depositing User:	Mr Sanat Kumar Behera
Date Deposited:	10 Oct 2011 05:48
Last Modified:	10 Oct 2011 05:48
URI:	http://oar.icrisat.org/id/eprint/2134
Official URL:	http://dx.doi.org/10.1023/B:EUPH.0000047087.85625....
Projects:	UNSPECIFIED
Funders:	UNSPECIFIED
Acknowledgement:	We are thankful to Dr Rodomiro Ortiz and Dr H.D. Upadhayaya for their comments on the manuscript, and to Mr V. Venkateshwara Rao, D. Krishna, and J. Were for their help in conducting these studies. Approved as JA no. 2325 by ICRISA
Links:	Author

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