Irregular Meiosis Associated with Pollen Sterility in <i>Vetiveria zizanioides</i> (Linn.) Nash
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چکیده
منابع مشابه
Abnormal male meiosis explains pollen sterility in the polyploid medicinal plant Pinellia ternata (Araceae).
Pinellia ternata is an important traditional Chinese medicinal plant. Its different populations in China have various ploidy levels, based on x = 13, as well as extensive aneuploid series. The microsporogenesis process was observed in specimens from three populations from three regions of Hubei Province; they were characterized by normal and abnormal meiotic divisions in pollen mother cel...
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The intersubspecific hybrids of autotetraploid rice has many features that increase rice yield, but lower seed set is a major hindrance in its utilization. Pollen sterility is one of the most important factors which cause intersubspecific hybrid sterility. The hybrids with greater variation in seed set were used to study how the F(1) pollen sterile loci (S-a, S-b, and S-c) interact with each ot...
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Cytoplasmic male sterility (CMS) is a widespread phenomenon in higher plants, and several studies have established that this maternally inherited defect is often associated with a mitochondrial mutant. Approximately 10 chimeric genes have been identified as being associated with corresponding CMS systems in the family Brassicaceae, but there is little direct evidence that these genes cause male...
متن کاملStudies on Self-Sterility II. Pollen-Tube Growth.
353 INTRODUCTION ................................................................. Historical ...................................................................... 354 Pollen-tube growth in artificial media. 356 Attempts to self-pollinate mutilated pistols. 358 Pollen-tube growth in the pistil.. 359 SUMMARY AND DISCUSSION ...................................................... 362 LITERATURE CI...
متن کاملGenetic consequences of the couplet cytoplasmic pollen sterility and pollen migration.
ATSON and CASPARI (1960) developed a mathematical model to study the VU behavior of cytoplasmic pollen sterility in populations. They dealt with a population possessing two kinds of cytoplasm and pollen sterility resulting from an interaction of the recessive homozygote with one of the cytoplasms. Under these conditions the frequencies of the maternally transmitted cytoplasms remained unchanged...
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ژورنال
عنوان ژورنال: CYTOLOGIA
سال: 1963
ISSN: 0011-4545,1348-7019
DOI: 10.1508/cytologia.28.242