Meiotic Observations of Pollen Mother Cells in Diploid and Autotetraploid Ziziphus jujuba Mill.‘Lajiaozao’

ACTA HORTICULTURAE SINICA ›› 2011, Vol. 38 ›› Issue (5): 867-874.

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Meiotic Observations of Pollen Mother Cells in Diploid and Autotetraploid Ziziphus jujuba Mill.‘Lajiaozao’

WU Gai-e1，LIU Ping 1,* ，LIU Meng-jun 1,* ，and LIU Guan-nan2

（¹ Research Center of Chinese Jujube，Agricultural University of Hebei，Baoding，Hebei 071001，China；²College of Life Science，Hebei University，Baoding，Hebei 071002，China）

Received:2011-03-25 Revised:2011-05-06 Online:2011-05-25 Published:2011-05-25
Contact: LIU Ping，LIU Meng-jun

Abstract

Abstract: Meiosis of pollen mother cells（PMCs）in diploid and autotetraploid‘Lajiaozao’Chinese jujube were observed，and all stages of the meiosis were analyzed. The results showed that the behavior of meiosis in autotetraploid was much more complicated than that in diploid. Compared with meiosis in diploid，the behavior of meiosis in autotetraploid was much more complicated. Diakinesis，univalents，bivalents，trivalents and quadrivalents appeared in autotetraploid‘Lajiaozao’，while two nuclei，including a large one and a small one，were observed. Some of the chromosomes were found not being arranged on equatorial plate at metaphaseⅠand metaphaseⅡfollowed by lagged chromosomes and chromosome bridges appeared at anaphaseⅠand anaphaseⅡ in the autotetraploid. At tetrad stage，dyads，triads with micronucleus，tetrads with micronucleus appeared. In conclusion，abnormal meiosis of PMCs is the cytogenetic reason for fertility reduction in autotetraploid‘Lajiaozao’.

Key words: Chinese jujube, diploid, autotetraploid, PMCs, meiosis

CLC Number:

S 665.1

WU Gai-e;LIU Ping;;LIU Meng-jun;;and LIU Guan-nan . Meiotic Observations of Pollen Mother Cells in Diploid and Autotetraploid Ziziphus jujuba Mill.‘Lajiaozao’ [J]. ACTA HORTICULTURAE SINICA, 2011, 38(5): 867-874.

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Meiotic Observations of Pollen Mother Cells in Diploid and Autotetraploid Ziziphus jujuba Mill.‘Lajiaozao’

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