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Biosystematic relationships among Cajanus, Atylosia, and Rhynchosia species and evolution of pigeonpea (Cajanus cajan (L.) Millsp.)

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Summary

Biosystematic studies encompassing morphocytological and electrophoretic analyses of Cajanus cajan, seven species of Atylosia and one of Rhynchosia revealed that A. cajanifolia is closest to C. cajan, followed by A. lineata, A. scarabaeoides, A. sericea, A. albicans, A. volubilis, A. platycarpa and R. rothii, in that order. A revision has been suggested for the taxonomic placement of the seven Atylosia species. Regarding the evolution of cultivated C. cajan, three possible alternatives have been suggested. Firstly, C. cajan could have evolved through gene mutation in A. cajanifolia; secondly, some of the Atylosia species and pigeonpea probably evolved from the same source; and thirdly, the pigeonpea might have developed from naturally occurring interspecific crosses of A. lineata and A. scarabaeoides.

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References

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Communicated by G. S. Khush

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Pundir, R.P.S., Singh, R.B. Biosystematic relationships among Cajanus, Atylosia, and Rhynchosia species and evolution of pigeonpea (Cajanus cajan (L.) Millsp.). Theoret. Appl. Genetics 69, 531–534 (1985). https://doi.org/10.1007/BF00251099

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Key words

  • Biosystematic relationships
  • Pigeonpea
  • Karyotype
  • Meiosis
  • Crossability
  • Seed protein profile