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Cereal Research Communications

, Volume 38, Issue 2, pp 285–293 | Cite as

Inheritance of A1 system of cytoplasmic-nuclear male sterility in pearl millet [Pennisetum glaucum (L). R. Br.]

  • D. Yadav
  • S. K. Gupta
  • V. N. Kulkarni
  • K. N. RaiEmail author
  • R. K. Behl
Open Access
Article

Abstract

Inheritance of male sterility and fertility restoration of the A1 system of cytoplasmic-nuclear male sterility in pearl millet was investigated using 12 crosses among three diverse male sterile lines (A-lines) and four diverse restorers (R-lines). Individual plants from R- lines were used to make crosses on A-lines. The segregation pattern of male sterile (S) and male fertile (F) plants observed in F2 and BC1 in two seasons at ICRISAT, Patancheru was suggestive more likely of a single-gene control of male sterility and fertility restoration. However, a 3-gene model of male sterility/fertility restoration where dominant alleles at any two of the three duplicate complimentary loci will lead to male fertility could not be ruled out, nor could be ruled out a 2-gene control with duplicate interaction. There was indication of variability even within a highly inbred R-line for fertility restoration gene(s). Depending on the genetic constitution of the R-lines at these loci, even the 3-gene model can lead to single-gene segregation ratios as observed in most of the F2s and backcrosses, and 2-gene ratios as observed in a few F2s and backcrosses. The deviations from these expected ratios in some of the crosses influenced by modifiers and environmental conditions generally resulted from the excess of fertile plants in the rainy season or excess of sterile plants in the dry season, the more so in crosses involving an A-line which has been reported to be relatively more unstable for male sterility.

Keywords

Pennisetum glaucum inheritance A1 cytoplasm male sterility fertility restoration 

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Copyright information

© Akadémiai Kiadó, Budapest 2010

This article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made.

Authors and Affiliations

  • D. Yadav
    • 1
    • 2
  • S. K. Gupta
    • 1
  • V. N. Kulkarni
    • 1
  • K. N. Rai
    • 1
    Email author
  • R. K. Behl
    • 2
  1. 1.International Crops Research Institute for the Semi-Arid Tropics (ICRISAT)PatancheruIndia
  2. 2.Chaudhary Charan Singh Haryana Agricultural University (CCSHAU)HisarIndia

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