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Mapping and characterisation of QTL × E interactions for traits determining grain and stover yield in pearl millet

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Title Mapping and characterisation of QTL × E interactions for traits determining grain and stover yield in pearl millet
Not Available
 
Creator R.S. Yadav
F.R. Bidinger
C.T. Hash
Y.P. Yadav
O.P. Yadav
S.K. Bhatnagar
C.J. Howarth
 
Subject Pearl millet
Genotype×environment interaction
Genetic mapping
Quantitative trait loci
QTL×environment interaction
Marker-assisted selection
 
Description Not Available
A mapping population of 104 F3 lines of pearl
millet, derived from a cross between two inbred lines
H 77/833-2 × PRLT 2/89-33, was evaluated, as testcrosses
on a common tester, for traits determining grain and stover
yield in seven different field trials, distributed over 3 years
and two seasons. The total genetic variation was partitioned
into effects due to season (S), genotype (G), genotype
× season interaction (G × S), and genotype × environment-
within-season interaction [G × E(S)]. QTLs were
determined for traits for their G, G × S, and G × E(S)
effects, to assess the magnitude and the nature (cross over/
non-crossover) of environmental interaction effects on individual
QTLs. QTLs for some traits were associated with
G effects only, while others were associated with the
effects of both G and G × S and/or G, G × S and G × E(S)
effects. The major G × S QTLs detected were for flowering
time (on LG 4 and LG 6), and mapped to the same intervals
as G × S QTLs for several other traits (including
stover yield, harvest index, biomass yield and panicle
number m–2). All three QTLs detected for grain yield were
unaffected by G × S interaction however. All three QTLs
for stover yield (mapping on LG 2, LG 4 and LG 6) and
one of the three QTLs for grain yield (mapping on LG 4)
were also free of QTL × E(S) interactions. The grain yield QTLs that were affected by QTL × E(S) interactions
(mapping on LG 2 and LG 6), appeared to be linked to
parallel QTL × E(S) interactions of the QTLs for panicle
number m–2 on (LG 2) and of QTLs for both panicle number
m–2 and harvest index (LG 6). In general, QTL × E(S)
interactions were more frequently observed for component
traits of grain and stover yield, than for grain or stover
yield per se.
Not Available
 
Date 2019-06-18T11:53:36Z
2019-06-18T11:53:36Z
2003-01-01
 
Type Research Paper
 
Identifier Not Available
Not Available
http://krishi.icar.gov.in/jspui/handle/123456789/20593
 
Language English
 
Relation Not Available;
 
Publisher Springer