Genetic diversity among early provitamin A quality protein maize inbred lines and the performance of derived hybrids under contrasting nitrogen environments.

BMC Genetics
Ebenezer Obeng-BioAbidemi Olutayo Talabi

Abstract

Information on population structure and genetic diversity of germplasm in a breeding programme is useful because it enhances judicious utilisation of genetic resources to achieve breeding objectives. Seventy early maturing provitamin A (PVA) quality protein maize (QPM) inbreds developed by the IITA- maize improvement programme were genotyped using 8171 DArTseq markers. Furthermore, 96 hybrids derived from 24 selected inbreds plus four checks were evaluated under low-N and optimal environments in Nigeria during 2016 and 2017. Genotypic and phenotypic data of inbreds and hybrids respectively, were analysed to (i) assess the level of genetic dissimilarities and population structure of the inbreds, and (ii) investigate the grain yield performance of derived hybrids under low-N, optimal and across environments. Genetic diversity among the seventy inbreds was high varying from 0.042 to 0.500 with an average of 0.357. Sixty-six inbred lines with probabilities ≥0.70 were assigned to a single group. The population structure analysis, the UPGMA phylogeny, and the principal Coordinate Analysis (PCoA) of the DArTseq markers revealed a clear separation of five groups and each followed pedigree records. Clustered inbreds displayed common cha...Continue Reading

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Aug 4, 2020·Plant Breeding = Zeitschrift Für Pflanzenzüchtung·Ebenezer Obeng-BioMustapha Abu Dadzie

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Methods Mentioned

BETA
genotyping
four hybrid

Software Mentioned

STRUCTURE
ILRI
BecA
TASSEL
STRUCTURE Harvester
PowerMarker
UPGMA
TZEIORQ
GenALEx
SAS

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