%0 Conference Paper
%A Kanuganahalli, V
%A Kodukula, P
%A Devulapall, R
%A Deshpande, S
%A Vadez, V
%A Blümmel, M
%B InterDrought-V
%C Hyderabad, India
%D 2017
%F icrisat:10720
%K Genetic variability, fodder quality traits, sorghum, water regimes
%P P-077
%T Genetic variability for fodder quality traits in sorghum under different water regimes
%U http://oar.icrisat.org/10720/
%X 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.