National Academy of Agricultural Sciences (NAAS)
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PRINT ISSN : 2319-7692
Online ISSN : 2319-7706 Issues : 12 per year Publisher : Excellent Publishers Email : editorijcmas@gmail.com / submit@ijcmas.com Editor-in-chief: Dr.M.Prakash Index Copernicus ICV 2018: 95.39 NAAS RATING 2020: 5.38 |
An experiment was conducted during rabi season in the year 2013, to know the effect of Ethrel on sex expression of Pistillate or Staminate flowers in Pistillate/Female and Monoecious lines of castor. The study was carried out with one monoecious line i.e., DCS-107 and two pistillate lines i.e., M-574 and DPC-9. Ethrel was sprayed at 100 ppm, 150 ppm and 200 ppm concentrations successively at 15, 30, 45 and 60 DAS. The results indicated that ethrel sprayed at all concentrations significantly increased the expression of pistillate flowers by suppression of interspersed staminate flowers (ISFs) in pistillate line and male flowers in monoecious line. Total number of female flowers per spikes significantly increased in ethrel sprayed plots as compared to unsprayed ones. Ethrel sprayed at 200 ppm gave maximum number of pistillate whorls, increased spike length, more number of capsules, increased seed weight and seed yield. The study revealed that Ethrel at 200 ppm has a great potential as growth regulator in maintaining pistillateness in hybrid seed production plots, thereby increasing genetic purity of hybrid seed.
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