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Genetic variability for fodder quality traits in sorghum under different water regimes

OAR@ICRISAT

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Relation http://oar.icrisat.org/10720/
 
Title Genetic variability for fodder quality traits in sorghum under different water regimes
 
Creator Kanuganahalli, V
Kodukula, P
Devulapall, R
Deshpande, S
Vadez, V
Blümmel, M
 
Subject Sorghum
Genetics and Genomics
 
Description Sorghum is grown as a dual purpose crop yielding food (grain)
and fodder (stover) in marginal environments of Asia and
Sub-Saharan Africa. Application of genomics and trait discovery
tools in breeding program can expedite genetic improvement of
fodder quality. Earlier reports suggested that a difference of one
percentage unit in stover digestibility increases livestock output
of 6 to 8%. To characterize fodder quality traits in sorghum and
to identify genomic regions related to t[hose traits, a set of mapping
population parents (24) were evaluated under two water
regimes (control and stress) over 3 years at ICRISAT-Patancheru.
In vitro organic matter digestibility (IVOMD%) – a key stover
quality trait, test weight (TW-g), stalk yield (SY-Kg/ha) and
grain yield (GY-Kg/ha) recorded significant variation across
genotype, treatment, year and interaction effects. Across season
analyses revealed a range of 45.8% to 50.4% for IVOMD,
variation from 1.9g to 4.1g for TW. The SY and GY recorded a
mean value of 4552 Kg/ha and 3152 Kg/ha, across years. While
heritability estimates across seasons were on higher side for TW
(0.85), SY (0.77) and IVOMD (0.70), it was lower for GY (0.39).
A positive correlation of 0.63 and 0.79 was observed for SY –
IVOMD and plant height (PH) - SY, respectively. This further implied
that an opportunity exists for simultaneous improvement
in both yield and fodder quality. We identified a parental set
of ICSV1 and ICSV700 having consistently contrasting values
across all seasons for IVMOD for further genetic mapping of the
fodder quality traits in sorghum.
 
Date 2017-02
 
Type Conference or Workshop Item
PeerReviewed
 
Format application/pdf
 
Language en
 
Rights —
 
Identifier http://oar.icrisat.org/10720/1/Genetic%20variability%20for%20fodder.pdf
Kanuganahalli, V and Kodukula, P and Devulapall, R and Deshpande, S and Vadez, V and Blümmel, M (2017) Genetic variability for fodder quality traits in sorghum under different water regimes. In: InterDrought-V, February 21-25, 2017, Hyderabad, India.