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Mapping of quantitative trait loci in pearl millet (Pennisetum glaucum (L.) R. Br.) and relating to the water stress environments

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Relation http://oar.icrisat.org/10739/
 
Title Mapping of quantitative trait loci in pearl millet (Pennisetum glaucum (L.) R. Br.)
and relating to the water stress environments
 
Creator Kakkera, A
Baddam, R
Vadez, V
 
Subject Abiotic Stress
Pearl Millet
 
Description Pearl millet, [Pennisetum glaucum (L.) R. Br.], is commonly grown
in the dry environments of north west India, characterised by
erratic rainfall that results in highly variable yields. Therefore,
identification of plant types to a target environment is a big challenge.
In this study, we are interested in traits that help improve
yield when the crop is grown under control, mild, moderate and
severe water stress based on the mean seasonal rain fall variations
(460, 305, 252 and 139 mm in 1988) observed in dry environments
of Rajasthan. We used F7 progenies of the RIL cross H
77/833–2 × PRLT 2/89–33. LG 2 was associated with grain yield
components i.e. grain mass, grain number of all water stress environments,
tiller number (mild water stress) and PHI (severe
water stress). Stover yield and flowering time were majorly associated
with LG 4 and LG 6 (mild and moderate water stress).
QTL interactions revealed that under well-watered conditions, a
combination of two H 77/833-2 alleles enhanced yield by 21%.
Under mild water stress interaction of two PRLT 2/89–33 alleles,
one H 77/833–2 allele enhanced the yield by 29%. Under severe
water stress, combination of three PRLT 2/89–33 alleles enhanced
yield by 8%, but when this severe stress was interrupted
by rain, then interaction of two PRLT 2/89–33 alleles with one H
77/833–2 allele enhanced the yield to 18%. This QTL study and
their interactions elucidated the adaptability of lines to design
environment-specific ideotypes.
 
Date 2017-02
 
Type Conference or Workshop Item
PeerReviewed
 
Format application/pdf
 
Language en
 
Rights —
 
Identifier http://oar.icrisat.org/10739/1/401.pdf
Kakkera, A and Baddam, R and Vadez, V (2017) Mapping of quantitative trait loci in pearl millet (Pennisetum glaucum (L.) R. Br.) and relating to the water stress environments. In: InterDrought-V, February 21-25, 2017, Hyderabad, India.