Flowering habits ofDichanthium annulatum, Stapf.,Dichanthium caricosum, A. Camus andBothriochloa intermedia (Br.) A. Camus
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The time interval between the various stages commencing with the appearance of flag-leaf of the boot to complete anthesis of panicle inD. annulatum, D. caricosum andB. intermedia was studied. Detailed study of blooming of florets and dehiscence of anthers ofD. annulatum was also carried out.
InD. annulatum andD. caricosum a period of two days elapses between complete emergence of panicles out of the boots and the commencement of anthesis thus allowing sufficient time to self and treat number of panicles at a time. InB. intermedia anthesis and dehiscence take place as the panicles emerge out of the boots and thus it is necessary to bag or treat the panicles immediately three or four days after the appearance of flag-leaf.
A period of 11 days inD. annulatum andD. caricosum and 9 days inB. intermedia is required from the appearance of flag leaf to completion of anthesis.
InD. annulatum anthesis and dehiscence take place as a rule, during night and early morning between 9p.m. and 4a.m.
InB. intermedia anthesis of florets and emergence of the panicles out of the boots take place simultaneously bit by bit and takes about 4 days for completion of these two processes. Blooming and dehiscence, however, take place during night and early morning as inD. annulatum.
D. annulatum, D. caricosum andB. intermedia appear to behave as self-pollinated grass species.
Laboratory experiments showed thatD. caricosum blooms and dehisces during night and early morning at about the same time asD. annulatum.
KeywordsEarly Morning Flag Leaf Orchard Grass Phleum Pratense Boot Stage
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- 1.Beddows, A. R. “Seed setting and flowering in various grasses”.Welsh Plant Breeding Station, Aberystwyth, Bull. Ser. H. 1931, No. 12, 5–99,Google Scholar
- 2.Fruwirth, C. “Beitrage zu den Grundlagen der Zuchtung einiger landwirtschaftlicher Kulturpflanzen. V. Graser. Naturwissenschaftliche Zeitschr.fur Forst-und Landwirtschaft”., 1916,14, 127–49.Google Scholar
- 3.Graham, R. J. D. “Pollination and cross-fertilization in Juar plant.(Andropogon sorghum, Brot),”Mem. Dept. Agri. India, Bot. Ser., 1916,8, No. 4.Google Scholar
- 4.Jenkin, T. J. “The artificial hybridization of grasses,”Welsh Plant Breeding Station, Bull. H., 1924,2, 1–18.Google Scholar
- 5.Kornicke, F.Handbuch des Getreidebaues. 1. Berlin. (As quoted by Rangaswami Ayyangar and V. Panduranga Rao, 1931), 1885.Google Scholar
- 6.Oke, J. G. (Unpublished). “Effect of selfing on various characters ofDichanthium annulatum, Stapf., andBothriochloa intermedia (Br.) A. Camus.Google Scholar
- 7.Ramnathan, V. “Some observations on Mendelian characters inSorghum”Jour. Madras Agri. Stud. Union, 1924,12, 1–17.Google Scholar
- 8.Rangaswami Ayyangar, G. N. and Panduranga Rao “Studies inSorghums. 1. Anthesis and Pollination,”Ind. Jour. Agri. Sc., 1931,1, 445–54.Google Scholar
- 9.Sando “As reported by Vinall, H. N. and Hein, M. A.,”U.S. Dept. Agri. Year Book., 1937, 1063.Google Scholar
- 10.Stephens, J. C. and Quinby, J. R. “Anthesis, Pollination and Fertilization inSorghum”Jour. Agri. Res., 1934,49, 123–36, illus.Google Scholar
- 11.Wolfe, T. K. “Observations on the blooming of Orchard grass flowers,”Jour. Amer. Soc. Agron., 1925,17, 605–18.Google Scholar