Observation on Double Fertilization and Early Embryonic Development in Autotetraploid Polyembryonic Rice

doi:10.1016/S1672-6308(08)60068-2

Abstract

Abstract: The process of double fertilization and the characters of embryo and endosperm development in an autotetraploid polyembryonic mutant rice IR36-Shuang were studied with a laser scanning confocal microscopy. Some abnormalities including degenerated ovary, abortive embryo sac, single fertilization, double-ovule and double-embryo and so on. were found during double fertilization and embryo development in IR36-Shuang. The rate of the abnormalities was 46.67% in IR36-Shuang, significantly higher than that in the control, an autotetraploid rice line IR36-4X (33.00%). Cytological and embryonic evidences were provided for seed setting decline and the initiation of additional embryo in IR36-Shuang.

Key words: rice, autotetraploid polyembryony, double fertilization, reproductive developmental character, developmental biology, embryonic development

DAI Xi-mei, YANG Xu, HUANG Qun-ce, QIN Guang-yong. Observation on Double Fertilization and Early Embryonic Development in Autotetraploid Polyembryonic Rice[J]. RICE SCIENCE, 2009, 16(2): 124-130 .

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