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International Journal of Agronomy
Volume 2018, Article ID 1864797, 10 pages
https://doi.org/10.1155/2018/1864797
Research Article

Genetic Variability and Its Implications on Early Generation Sorghum Lines Selection for Yield, Yield Contributing Traits, and Resistance to Sorghum Midge

1Institut National de la Recherche Agronomique du Niger (INRAN), BP 429, Niamey, Niger
2West Africa Centre for Crop Improvement, University of Ghana, PMB 30, Legon, Accra, Ghana
3Department of Plant Breeding and Genetics, Cornell University, 520 Bradfield Hall, Ithaca, NY 14850, USA
4International Crops Research Institute for the Semi-Arid Tropics, BP 12404, Niamey, Niger

Correspondence should be addressed to Massaoudou Hamidou; rf.oohay@duoassamh

Received 11 December 2017; Revised 13 February 2018; Accepted 5 March 2018; Published 8 April 2018

Academic Editor: Kassim Al-Khatib

Copyright © 2018 Massaoudou Hamidou et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Sorghum is the second most important cereal crop in Niger. The crop is grown in a wide range of ecological environments in the country. However, sorghum grain yield in Niger is limited by both abiotic and biotic constraints. Recombinant inbred lines derived from the cross of a local variety with a midge resistant variety and two local checks were evaluated during the 2015 rainy season across two planting dates in two environments in Niger. The objective was to investigate genetic variability for yield, yield related traits, and resistance to sorghum midge. High phenotypic coefficient of variation (PCV) versus genotypic coefficient of variation (GCV) was observed in both sites and planting dates. Across planting dates at both Konni and Maradi, grain yield, plant height, panicle weight, and midge damage had high heritability coupled with high estimates of genetic advance. At Konni, high genetic advance coupled with high heritability was detected for grain yield, plant height, panicle weight, and resistance to midge. There were similar results at Maradi for grain yield, plant height, and panicle weight. Therefore, selection might be successful for the above characters in their respective environments.