Meiosis and Pollen Fertility of Tetraploid Hemerocallis Cultivars

doi:10.7668/hbnxb.2011.S1.010

Abstract

Abstract: In order to investigate fertility reduction of tetraploid Hemerocallis,the meiosis and chromosome behavior of pollen mother cells(PMCs) in tetraploid Hemerocallis were studied using chromosome preparation technique.And the pollen viability was determined by vitro germination experiment.The results showed that PMCs meiosis of tetraploid Hemerocallis was abnormal:In prophase I,bi-nucleoluses were observed.In diakinesis,quadrivalent,trivalent and univalent were observed.Some of the chromosomes were found not to rank at equatorial plate in metaphase I and metaphaseⅡcells.In anaphase I and anaphaseⅡcells,there were lagged chromosomes,lost chromosome and chromosome bridge.At tetrad stage,triad,tetrad with micronucleus and polyed appeared.In meiosis,the normal PMCs were 60.18% and abnormal PMCs were 39.82%.The abnormal meiosis was the most important reason of pollen fertility reduction of tetraploid Hemerocallis.

Key words: Tetraploid Hemerocallis, Meiosis, Pollen viability

CLC Number:

S685.03

HE Qi, GAO Yi-ke. Meiosis and Pollen Fertility of Tetraploid Hemerocallis Cultivars[J]. ACTA AGRICULTURAE BOREALI-SINICA, 2011, 26(S1): 47-50. doi: 10.7668/hbnxb.2011.S1.010.

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