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- W2379969607 abstract "Studies on morphology,fertility and chromosome pairing behavior in meiosis of Iris japonica,I.confusa and their artificial hybrids were carried out.It is concluded from the results that:(1)Morphologically I.japonica was similar to I.confusa ,and the general appearance of the interspecific hybrid plants was intermediate between their parents.(2)It was easy to obtain the hybrid seeds,and most of the seeds germinated normally and developed into vigorous plants.The chromosome number was 30 in root-tip cells of the hybrid.The F 1 hybrids showed a comparatively high chromosomal pairing in meiosis of pollen mother cells at MI with an average of 13.90 bivalents,and mean meiotic configuration was 0.95Ⅰ+5.95Ⅱ(rod)+7.95Ⅱ(ring)+0.05Ⅲ+0.27Ⅳ.This result indicated that I.japonica and I.confusa shared the highly homologous genomes and were closely related.(3)A few amount of multivalents were observed in the hybrid,suggesting either that structural rearrangements have arisen between the parental chromosomes,or which seems more likely,that a certain degree of homoeology exists among the chromosomes in the species.(4)Occurring 2 univalents,irregular meiosis,partial pollen fertility and no seed set in the hybrids suggested that there existed reproductive barriers between I.japonica and I.confusa ,and they are two independent biological species.(5)Cytomixis occurred in meiotic prophase of pollen mother cells (PMCs) in the hybrids F 1,which was probably the important reason for aneuploid and multiploid existed in the different populations of I.japonica and I.confusa ." @default.
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- W2379969607 date "2003-01-01" @default.
- W2379969607 modified "2023-09-25" @default.
- W2379969607 title "Cytogenetic Study on the Interspecific Hybrid between Iris japonica and Iris confusa (Irisaceae)" @default.
- W2379969607 hasPublicationYear "2003" @default.
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