Summary
In the group of sorghum S.dochna (Forsk.) Snowden two types of panicles have been met with. In the loose-eonical type the panicle branches are long and the earhead is conical in appearance owing to their decreasing length from base to tip. In the compact-spindle type this conical disposition is also there, the cone being narrower; but the panicle branches are considerably shorter in length and due to the absence of the pulvinus-like structure in the axil of the panicle branches, they are adpressed to the central rachis giving the earhead a spindle-shaped look. In these spindle-shaped earheads, the rachis is slightly reduced in length, the number of side branches decreases and the number of fertile spikelets (grains) also decreases. The leaves also make a slightly narrower angle with the stem.
A factor Pa1 produces loose conical earheads: factor pa1 results in compact spindle-shaped earheads. These factors Pa1 pa1 affecting the panicle shape are closely linked to the factors Zz governing the thickness of mesocarp and the deposit of starch in it, with a cross-over value of 1.07 per cent.
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Literature Cited
Imai, Y.Genetics, 1935,10, 456–69.
Karper, R. E.Texas Agric. Bxp. Sta. 44th Ann. Rep., 1931, p. 51.
Martin, J. H.U.S. Dept. Agric. Year-Book, 1936, p. 554.
Ramanathan, V.J. Madras, Agri. Stud. Union, 1924,12, 13.
Rangaswami Ayyangar, G. N.Rep. Agri. Sta., Madras Presy. (1931–32), 1932, p. 338.
— (1932–33), 1933, p. 373.
-ibid. (1933–34), 1934a, p. 437.
—Madras Agri. J., 1934b,22, 4.
— et al.Ind. J. Agri. Sci., 1934,4, 96–99.
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Rangaswami Ayyangar, G.N., Sankara Ayyar, M.A. Linkage between a panicle factor and the pearly-chalky mesocarp factor (Zz) in sorghum. Proc. Indian Acad. Sci. 8, 100–107 (1938). https://doi.org/10.1007/BF03048478
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DOI: https://doi.org/10.1007/BF03048478