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Not AvailableFile attachedICAR-IIMR, Hyderaba

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Not AvailableNot AvailGeneration mean analyses were carried out to study genetics of traits associated with shoot fly resistance in three crosses using male sterile susceptible female and resistant male parents (104B x IS18551, 104B x IS2312 and 104B x RSE03) during 2006-07 at two locations. The mean performance of families showed that resistance as indicated by lower deadheart percentage is governed by recessive genes. Both additive and nonadditive gene actions were important for resistance, and this trait is influenced by environment. The line RSE 03 was a better source of resistance with relatively simple genetics for shoot fly resistance and component traits. Indirect selection through the component traits such as glossiness and seedling height which were under the control of additive genes would be effective for developing sorghum varieties resistant to shoot fly infestationableNot Availabl

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Not AvailableGenetic enhancement for shootfly (Atherigona soccata (Rondani)) resistance was assessed in different segregating generations of sorghum crosses and their parents under different levels of shootfly infestation. The inheritance was studied for oviposition and deadheart formation. Field trials were conducted with F3 , F4 and F5 sorghum progenies for three consecutive years from 2005-08 in post rainy seasons at the farm attached to Directorate of Sorghum Research, Solapur. Five crosses viz., 104 B x IS 2122, RS 585 x IS 18551, R 354 x RSE 97109, RSE 3 x CSV 216 R and R 354 x IS 18551 were taken during three years. F3 s material (172 entries) was subjected to shootfly evaluation. The material was evaluated in F3, F4 and F5 generations during Rabi (2006-08) consisted of 172, 71 and 49 entries, respectively. Shootfly eggs and deadhearts were monitored at 21 days after germination under natural pesticide free condition. Overall improvement of resistance was recorded from F3 to F4 generation in all crosses. A similar consistent increasing trend on oviposition and deadhearts formation was observed with all the crosses in F5 generation. A similar trend in improvement of resistance levels observed in terms of oviposition in F5 progenies ranging from 56.6 % (R 354 x IS 18551) to 92.8 % ( R 354 x CSV 216 R). The consistent levels of shootfly deadheart formation were recorded with the resistant check, IS 2312 (20.95-25.64 %). These crosses will be subjected to evaluation in subsequent generations to obtain stable lines for shootfly resistance. The selection for low level of deadheart percentage would improve the level of resistance in the subsequent generations. The crosses viz., R 354 x IS 18551, 104 B x IS 2122, RS 585 x IS 18551 were conferred with resistance to shootfly.Not Availabl

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Not AvailableSeven sorghum hybrids (Mahalaxmi 296, NSH 27, SBSH 151, Kaveri 6363, CSH 23, CSH 16 and CSH 15R) were evaluated for their relative response to 5 levels of nitrogen (25, 75, 125, 175 and 225 kg/ha) in rice-fallows under zero tillage during rabi 2009–10 at farmer’s field in Guntur district of coastal Andhra Pradesh. Significantly highest grain yield (8.04 tonnes/ha), nutrient uptake and benefits were recorded with 225 kg N/ha. Among different hybrids, SBSH 151, CSH 16, Kaveri 6363, NSH 27 and Mahalaxmi 296 being on a par with each other produced significantly higher grain yields (7.09-7.27 tonnes/ha). The lowest grain yield (5.67 tonnes/ ha) was recorded with CSH 15R followed by CSH 23 (5.88 tonnes/ha). Higher protein content in sorghum grains (10.0- 10.06%) was recorded by CSH 15R and CSH 16 due to higher nitrogen concentration (1.6-1.61%).Not Availabl

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