Indian Society of Genetics & Plant Breeding

Genetic analysis of recombinant inbred lines for iron deficiency chlorosis and productivity traits in groundnut

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Iron deficiency is an important abiotic constraint reducing
the growth and yield of groundnut especially under
calcareous soils. Foliar application of Fe-chelates can
overcome iron deficiency but it is not economical.
Evaluation of 318 recombinant inbred lines (RILs) along
with parents for iron deficiency chlorosis (IDC) and
productivity traits under iron deficient soils over three years
indicated significant genotypic and genotypic x
environment interaction (GE) component for both IDC and
productivity traits. Among the RILs, range of variation was
higher than that of the parents for visual chlorotic rating
(VCR), SPAD chlorophyll meter reading (SCMR) and
productivity parameters across three years indicated the
presence of transgressive segregants. VCR had higher
phenotypic and genotypic, variances, heritability and
genetic advance as per cent of mean (GAM) in all the three
years as compared to SCMR. Among productivity traits,
pod yield (g plant–1) had higher PCV and GCV compared to
shelling per cent and 100 seed weight. Significant negative
correlation between VCR and pod yield per plant indicated
effect of IDC on productivity in RILs. Nine lines were
superior for both IDC tolerance and productivity traits. This
extensive phenotyping of RIL population for IDC tolerance
under iron deficient conditions can be used for
identification of genomic regions associated with IDC
tolerance by genotyping of this RIL population.

Keywords: Groundnut, iron deficiency chlorosis, productivity traits, recombinant inbred lines


Year: 2017
Volume: 77
Issue: 3
Article DOI: 10.5958/0975-6906.2017.00056.6
Print ISSN: 0019-5200
Online ISSN: 0975-6906


Santosh K. Pattanashetti info_circle
Ishwar H. Boodi info_circle
Omprakash Kumar Singh info_circle
Prakyath Kumar K. V info_circle
Basavaraj D. Biradar info_circle
Mruthyunjay C. Wali info_circle

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