Indian Society of Genetics & Plant Breeding

Genetic architecture of open-pollinated varieties of pearl millet for grain iron and zinc densities

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Genetic architecture of two commercial open-pollinated
varieties of pearl millet (ICTP 8203 and ICMV 221) for grain
iron and zinc densities was studied using 160 full-sib
progenies each that were developed following North
Carolina Design -1 and evaluated for two seasons. Results
showed predominantly additive genetic variance and nonsignificant
additive gene effect × environment interaction
variance compared to large and significant dominance ×
environment interaction variance for both micronutrients
in both populations. This translated into high narrow-sense
heritability for Fe (65%) and Zn (86%) in ICTP 8203, and
moderate heritability of 45% for both micronutrients in ICMV
221. In comparison, 1000-seed weight, generally assumed
to be highly heritable, was predominantly under dominance
gene control and had large dominance × environment
interaction, giving the narrow-sense heritability estimates
of 31% in ICTP 8203 and 13% in ICMV 221. These results,
and highly significant and positive correlation observed
between Fe and Zn densities, and non-significant
correlations of these micronutrients with grain weight
suggest that simultaneous selection for Fe and Zn densities
in these populations can be effectively made without
compromising the grain size.

Keywords: Pearl millet, open pollinated variety, grain iron and zinc density, genetic variance


Year: 2016
Volume: 76
Issue: 3
Article DOI: 10.5958/0975-6906.2016.00045.6
Print ISSN: 0019-5200
Online ISSN: 0975-6906


Kommineni Radhika info_circle
Mahalingam Govindaraj info_circle

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