A New Sythetic Hybrid (A1D5) between Gossypium herbaceum and G. raimondii and Its Morphological, Cytogenetic, Molecular Characterization
Publication Overview
Abstract The diploid species G. herbaceum (A1) and G. raimondii (D5) are the progenitors of allotetraploid
cotton, respectively. However, hybrids between G. herbaceum and G. raimondii
haven't been reported. In the present study, hybridization between G. herbaceum and G.
raimondii was explored. Morphological, cytogenetic and molecular analyses were used to
assess the hybridity. The interspecific hybrid plants were successfully obtained. Most of the
morphological characteristics of the hybrids were intermediate between G. herbaceum and
G. raimondii. However, the color of glands, anther cases, pollen and corolla, and the state of
bracteoles in hybrids were associated with the G. herbaceum. The color of staminal columns
and filaments in hybrids were associated with G. raimondii. Cytogenetic analysis confirmed
abnormal meiotic behavior existed in hybrids. The hybrids couldn't produce boll-set. Simple
sequence repeat results found that besides the fragments inherited from the two parents,
some novel bands were amplified in hybrids, indicating that potential mutations and chromosomal
recombination occurred between parental genomes during hybridization. These
results may provide some novel insights in speciation, genome interaction, and evolution of
the tetraploid cotton species.
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