ArticleHorticulture research2025
The cytological mechanism of the peach haploid producing triploid offspring.
Article in Horticulture research, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
Peach is one of the most economically valuable fruit trees. Haploid peach trees occur spontaneously at very low frequencies and they are usually highly sterile. Therefore, the haploid with partial fertility is an extremely rare germplasm, which is highly valuable to genetic research and breeding programs. In this study, we investigated the cytological mechanism underlying the fertility of a peach haploid mutant '9-D' derived from a spontaneous mutation. Cytologic evaluation and flow cytometry analysis demonstrated that '9-D' is a pure haploid. Scanning electron microscope analysis revealed a considerable proportion of abnormal pollen grains in '9-D'. Pollen viability assay by Alexander staining showed that 50.4% of pollen grains from '9-D' were viable. However, the pollen germination assay showed that only 7.6% of the pollen grains could germinate normally. Investigation of the chromosomal behavior of pollen mother cells at different stages of meiosis showed that pollen mother cells of '9-D' lacked the process between anaphase I and prophase II of meiosis. Various types of sporophyte morphology were observed in haploid pollen mother cells at the tetrad stage. Measurement of the diameter of pollen grains indicated the presence of pollen with 2
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