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Journal of Crop Science and Biotechnology

, Volume 15, Issue 3, pp 195–203 | Cite as

Genetic analysis of sodium content and Na/K ratio in relation to salinity tolerance in pearl millet Pennisetum glaucum (L.) R. Br.

  • Arjuna Rao Palakollu Venkata
  • Panda Kusuma Kumari
  • Tavva Surya Santosh Mohan Dev
  • Muktinutalapati Venkata Subba RaoEmail author
  • Vangury Manga
Research Article

Abstract

Genetic analysis of sodium and sodium/potassium (Na/K) ratios in leaf and stem was carried out through diallel analysis involving two tolerant, one moderately tolerant, and two sensitive genotypes as parents. Three-week-old seedlings were subjected to a critical level of salinization (17 decisiemens per meter of electrical conductivity). Leaf and stem sampling (from 5 parents and 20 hybrids arranged in a randomized block design with three replications of 10 each) was done 30 days after salinization when susceptible parents were severely effected. Predominance of non-additive gene action for stem sodium and dominance component for leaf Na/K were noticed while both additive and non-additive components played a significant role for stem Na/K. A single group of genes seems to be operative for these characters. Hybrids produced by crossing the two sensitive parents were tolerant suggesting genetic complementation and involvement of different loci in the two parents for salinity tolerance. The overall dominant nature of tolerance and the additive gene action for these salinity related characters suggested the possibility of breeding pearl millet lines through hybridization and selection to pyramid the favorable genes.

Key words

combining ability diallel analysis genetic variation pearl millet salinity tolerance 

Abbreviations

dSm−1

electrical conductivity in decisiemens per meter

GCA

general combining ability

HNS

Hoagland nutrient solution

Na/K

sodium to potassium ratio

SCA

specific combining ability

Vr

variance of rth array

Wr

covariance of rth array

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Copyright information

© Korean Society of Crop Science and Springer Science+Business Media Dordrecht 2012

Authors and Affiliations

  • Arjuna Rao Palakollu Venkata
    • 1
  • Panda Kusuma Kumari
    • 1
  • Tavva Surya Santosh Mohan Dev
    • 1
  • Muktinutalapati Venkata Subba Rao
    • 1
    Email author
  • Vangury Manga
    • 1
  1. 1.Plant Genetics and Biotechnology Laboratory, Department of BotanyAndhra UniversityVisakhapatnamIndia

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