Inheritance and allelic relationship among gene(s) for blast resistance in pearl millet [Pennisetum glaucum (L.) R. Br.]

Singh, S and Sharma, R and Pushpavathi, B and Gupta, S K and Durgarani, CH V and Raj, C and Prasad, M (2018) Inheritance and allelic relationship among gene(s) for blast resistance in pearl millet [Pennisetum glaucum (L.) R. Br.]. Plant Breeding (TSI). pp. 1-12. ISSN 01799541

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Six blast‐resistant pearl millet genotypes, ICMB 93333, ICMB 97222, ICMR 06444, ICMR 06222, ICMR 11003 and IP 21187‐P1, were crossed with two susceptible genotypes, ICMB 95444 and ICMB 89111 to generate F1s, F2s and backcrosses, BC1P1 (susceptible parent × F1) and BC1P2 (resistant parent × F1) for inheritance study. The resistant genotypes were crossed among themselves in half diallel to generate F1s and F2s for test of allelism. The F1, F2 and backcross generations, and their parents were screened in a glasshouse against Magnaporthe grisea isolates Pg 45 and Pg 53. The reaction of the F1s, segregation pattern of F2s and BC1P1 derived from crosses involving two susceptible parents and six resistant parents revealed the presence of single dominant gene governing resistance in the resistant genotypes. No segregation for blast reaction was observed in the F2s derived from the crosses of resistant × resistant parents. The resistance reaction of these F2s indicated that single dominant gene conferring resistance in the six genotypes is allelic, that is same gene imparts blast resistance in these genotypes to M. grisea isolates.

Item Type: Article
Divisions: Research Program : Asia
Uncontrolled Keywords: allelism, blast, inheritance, monogenic dominance, pearl millet, blast resistance, pearl millet genotypes
Subjects: Mandate crops > Millets > Pearl Millet
Others > Genetics and Genomics
Depositing User: Mr Ramesh K
Date Deposited: 27 Jun 2018 08:01
Last Modified: 27 Jun 2018 08:01
Official URL:
Funders: Pearl Millet Hybrid Parents Research Consortium
Acknowledgement: The authors gratefully acknowledge the funding support from Pearl Millet Hybrid Parents Research Consortium to carry out this research work.
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