Cytological Studies on Pollen Abortion Mechanisms of Cytopl asmic Mala Steril a Line of T, V and K Types in Wheat

doi:10.7668/hbnxb.1996.02.001

Abstract

Abstract: The pollen abortion processes of cms-T, V and K in wheat with the same nuclear background (83(21)35) were studied cytologically by. light microscopy. It was found that the microsporogenesis of cms-T、V and K were normal. The pollens of cms-T aborted at late microspore stage, mainly in typical and spherical abortion types; those of cms-V aborted at late microspore-2-celled pollen stage, spherical abortion and light-staining abortion were the main types; while those of cms-K aborted at late 2-celled pollen-3-celled pollen stage, light-and blackstaining abortion were the main types.
The abnormal fusion of anther locules was very pApular in cms-T, while the developement of anther wall layers in cms-K or cms-V was normal. The inharmonious relation between nuclear and cytoplasm is the fundamental cause of opllen abortion. The cytological observation can be used as complemental criterion for determining the types of cms.

Key words: Cytology Wheat, Cytoplasmic male sterility, Pollen abortion, Isonuclear alloplasmic line

CLC Number:

S512.103

Li Chuanyou, Sun Lanzhen. Cytological Studies on Pollen Abortion Mechanisms of Cytopl asmic Mala Steril a Line of T, V and K Types in Wheat[J]. ACTA AGRICULTURAE BOREALI-SINICA, 1996, 11(2): 1-8. doi: 10.7668/hbnxb.1996.02.001.

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