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Biomass Heterosis as the Basis for Grain and Stover Yield Heterosis in Arid Zone Pearl Millet Hybrids

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Title Biomass Heterosis as the Basis for Grain and Stover Yield Heterosis in Arid Zone Pearl Millet Hybrids
Not Available
 
Creator F. R. Bidinger
O.P. Yadav
 
Subject Pearl millet
Hybrids
Arid Zone
 
Description Not Available
Pearl millet [Pennisetum glaucum (L.) R. Br.]
single cross hybrids, bred from high-yielding
parental lines in favorable environments, are
not well adapted to northwest India’s arid zone.
The objectives of these experiments were (i) to
measure grain and stover yield heterosis in testcrosses
of six landrace-based restorer populations
and (ii) to understand how heterosis for
biomass and harvest index (HI) affects heterosis
for grain and stover yields in crosses of these
populations. Six restorer populations and their
testcrosses on 10 to 13 A1 male-sterile lines
were evaluated at two arid zone locations of
northwest India. Heterosis was calculated as
percentage advantage of testcross hybrids over
parental restorer population. The range in individual
testcross heterosis varied from −3% to
+39% for grain yield and from −22% to +17%
for stover yield. Variation in biomass heterosis
accounted for 55% of the variation in grain yield
heterosis and 84% of the variation in stover yield
heterosis. Harvest index heterosis accounted
for 38% of variation in grain yield heterosis and
13% of stover yield heterosis with a positive
heterosis in HI resulting in negative heterosis in
stover yield. The testcrosses with the highest
biomass heterosis for each restorer population
achieved 20% biomass heterosis level (combined
with a mean 12% heterosis in HI), resulting
in 32% grain yield heterosis and 18% stover
yield heterosis. We concluded that heterosis for
biomass was the major determinant of grain and
stover yield heterosis in pearl millet.
Not Available
 
Date 2019-06-18T11:47:35Z
2019-06-18T11:47:35Z
2009-02-01
 
Type Research Paper
 
Identifier Not Available
Not Available
http://krishi.icar.gov.in/jspui/handle/123456789/20587
 
Language English
 
Relation Not Available;
 
Publisher Crop Science Society of America