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This article in CS

  1. Vol. 30 No. 1, p. 23-25
     
    Received: May 8, 1989
    Published: Jan, 1990


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doi:10.2135/cropsci1990.0011183X003000010005x

Morphological Characteristics of Tall and Dwarf Pearl Millet Isolines

  1. K. N. Rai and
  2. W. W. Hanna 
  1. U niv. of Georgia, Coastal Plain Exp. Stn., Tifton, GA 31793 (Permanent address: Cereals Program, ICRISAT, Patancheru, A.P. 502324, India.)
    U SDA-ARS, Dep. of Agronomy, Coastal Plain Exp. Stn., Univ. of Georgia, Tifton, GA 31793

Abstract

Abstract

Among all the dwarfing genes reported in pearl millet [Pennisetum glaucum (L.) R. Br.], the d2 gene has been most extensively utilized in breeding programs. Its effect on morphological characters, however, has not been adequately studied in the past due to lack of isogenic lines. The objective of this research was to study the effect of the d2 dwarfing gene on several morphological characters by comparing six pair of tall and dwarf near-isogenic lines (isolines) developed in genetic backgrounds of two diverse composites. Tests conducted on plant and seed characteristics at the ICRISAT Center, Patancheru, India and Tifton, GA, showed that dwarf isolines were shorter but had longer peduncles, longer panicles, narrower panicles, thicker culms, wider leaves, and smaller seeds than their tall counterparts. The differences between tall and dwarf isolines for number of total and effective tillers plant −1, leaf sheath length, and time to 50% anthesis were either nonsignificant or inconsistent across locations. Plant height was the only characteristic studied that was not influenced by genetic background. Genetic variation among isolines for effects of the d2 gene on numerous characters indicate the gene can be used to advantage by incorporating it into diverse germplasm.

Cooperative investigations of the USDA-ARS, Univ. of Georgia, and ICRISAT. Approved by ICRISAT JA no. 900.

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Copyright © 1990. Crop Science Society of America, Inc.Copyright © 1990 by the Crop Science Society of America, Inc.