Effect of temperature and rainfall regimes on growth phases and biological yield in rabi sorghum

A field experiment was conducted during rabi season of 2017–19 at the All India Coordinated Sorghum Improvement Project, Mahatma Phule Krishi Vidyapeeth Rahuri to assess the effect of temperature and rainfall regimes on growth phases and biological yield components in rabi sorghum genotypes. The experiment consisted of thirteen genotypes evaluated in three rabi season. In the rabi season 2017 and 2018 there is there is sufficient rainfall at the time of sowing. Also maximum and minimum temperature ranges between 24 to 33 ⁰C. At the time of flowering maximum and minimum temperature ranges between 15 to 28 ⁰C. Genotypes come to flowering in between 71 to 89 days after sowing. Phule Anuradha shows very early flowering in rabi 2017 and 2018 season. In rabi 2019 due to change in rainfall and temperature there is significantly reduction in days to days to maturity. Phule Anuradha matures very early (107 days). BJV 362 gave higher biological yield (217 gm) in 2017 and RSV 2541give higher biological yield per plant (215 gm) in 2018. The biological yield reduces significantly in 2019.