Relative susceptibility of different male-sterile cytoplasms in sorghum to shoot fly, <Emphasis Type="Italic">Atherigona soccata</Emphasis> |
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| Authors: | M?K?Dhillon Email author" target="_blank">H?C?SharmaEmail author B?V?S?Reddy Ram?Singh J?S?Naresh Zhu?Kai |
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| Institution: | (1) International Crops Research Institute for the Semi-Arid Tropics (ICRISAT), Patancheru, 502324, India;(2) Chaudhary Charan Singh Haryana Agricultural University, 125 004, India;(3) Sorghum Research Institute, Liaoning Academy of Agricultural Sciences, Shenyang, Liaoning, China |
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| Abstract: | Summary The shoot fly, Atherigona soccata is an important pest of sorghum, and host plant resistance is one of the most effective components for managing this pest.
Most of the hybrids grown in India based on milo cytoplasm (A1 cytoplasm) are highly susceptible to shoot fly. Therefore, the present studies were undertaken to evaluate different male-sterile
cytoplasms (CMS) for their relative susceptibility to sorghum shoot fly. Oviposition and deadheart formation were significantly
lower on the maintainer lines as compared to the corresponding male-sterile lines. Among the cytoplasms tested, A4M cytoplasm showed antixenosis for oviposition and suffered lower deadheart formation than the other cytoplasms tested. The
A4G1 and A4M cytoplasms suffered lower deadhearts in tillers than the other cytoplasms. Recovery following shoot fly damage in A4M, A3, and A2 cytoplasms was better than in the other cytoplasms tested. The larval and pupal periods were longer and male and female pupal
weights lower in A4M and A4VzM CMS backgrounds compared to the other CMS systems. Fecundity and antibiosis indices on CMS lines were lower than on the
B-lines. The A4M cytoplasm was found to be relatively resistant to sorghum shoot fly, and can be exploited for developing shoot fly-resistant
hybrids for sustainable crop production in future. |
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| Keywords: | Atherigona soccata cytoplasmic male-sterility mechanisms of resistance shoot fly sorghum susceptibility |
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