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Prezygotic interspecific hybridization barriers between kenaf ( Hibiscus cannabinus L.) and four wild relatives
Author(s) -
Satya Pratik
Publication year - 2012
Publication title -
plant breeding
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.583
H-Index - 71
eISSN - 1439-0523
pISSN - 0179-9541
DOI - 10.1111/j.1439-0523.2012.02001.x
Subject(s) - kenaf , hibiscus , biology , pollen tube , callose , pollen , botany , gynoecium , ovule , interspecific competition , germination , pollination , stamen , chemistry , cell wall , organic chemistry , fiber
Use of interspecific hybridization in genetic improvement of kenaf ( Hibiscus cannabinus ), a multipurpose crop, is limited by low cross‐compatibility. Previous hybridization studies suggest that part of incompatibility barrier is prezygotic. Pollen germination, stigma receptivity and growth of alien pollen on kenaf pistil were studied using wild relatives of kenaf. Four wild and semi‐domesticated species, H. surattensis , H. acetosella , H. radiatu s and H. vitifolius , were used as pollen donors in the present experiment. H. radiatus exhibited highest pollen germination (65.89%) on H. cannabinus stigma. For closely related species ( H. surattensis , H. acetosella , H. radiatu s), stylar incompatibility was noticed, while for distantly related species H. vitifolius , the incompatibility was stigmatic. Number of pollen tubes entering ovule of H. cannabinus pistil was higher for H. radiatus (1.30). Alien pollen growth and penetration of pollen tube through ovule were higher in species sharing same genome of H. cannabinus . High callose deposition was observed in incompatible crosses, suggesting a general mechanism for prezygotic incompatibility in Hibiscus section Furcaria . Callose deposition in incompatible crosses increased with time.