Competitive interspersed staminate flowers in females: A problem in hybrid seed production of castor: Competitive interspersed staminate flowers in females: A problem in hybrid seed production of castor

K BHAVYA; YAMANURA; N NETHRA; R MOHAN KUMAR; R L RAVIKUMAR; R SIDDARAJU

doi:10.56739/tw5d9k97

Authors

K BHAVYA All India Co-ordinated Research Project on Castor, Zonal Agricultural Research Station, University of Agricultural Sciences, GKVK, Bengaluru-560 065
YAMANURA All India Co-ordinated Research Project on Castor, Zonal Agricultural Research Station, University of Agricultural Sciences, GKVK, Bengaluru-560 065
N NETHRA All India Co-ordinated Research Project on Castor, Zonal Agricultural Research Station, University of Agricultural Sciences, GKVK, Bengaluru-560 065
R MOHAN KUMAR All India Co-ordinated Research Project on Castor, Zonal Agricultural Research Station, University of Agricultural Sciences, GKVK, Bengaluru-560 065
R L RAVIKUMAR All India Co-ordinated Research Project on Castor, Zonal Agricultural Research Station, University of Agricultural Sciences, GKVK, Bengaluru-560 065
R SIDDARAJU All India Co-ordinated Research Project on Castor, Zonal Agricultural Research Station, University of Agricultural Sciences, GKVK, Bengaluru-560 065

https://doi.org/10.56739/tw5d9k97

Keywords:

Castor, Hybrid seed production, Interspersed staminate flowers (ISF)

Abstract

The in vitro pollen germination study was carried out by using pollens of six genotypes which included two popular hybrids, two female and two male parents viz, DCH-177, ICH-66, DPC-9, SKP-84, DCS-9 and ICS-164 to know the competitiveness of interspersed staminate flowers (ISF). The standardized medium containing 15% sucrose, 0.01% H3BO3, 0.3% Ca(NO3).4H2O, 0.0214% Mg (SO4) 7H2O and 0.01% KNO3 were used in the study. The results revealed that highest % of pollen germination observed with ISF pollens of female parents (DPC- 9: 57.35% and SKP- 84: 44.51%) in both the hybrids compared to their respective male parents (DCS-9: 47.24% and ICS-164: 27.27%). It indicated the importance of rouging of ISFs in order to maintain the high genetic purity in castor hybrid and parental seed production.

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References

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Competitive interspersed staminate flowers in females: A problem in hybrid seed production of castor