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Cytogenetic characterization of a triploid mulberry (Morus spp.) cultivar Suvarna-2

Daryoush Shafiei, Basavaiah Prof.

Abstract


Mulberry exehibits a high degree of polyploidy ranging from haploidy to docosaploidy and its various species are being cultivated for foliage to practice sericulture and edible fruits. Triploid mulberries for sericulture porpuse and higher polyploids are proved to be superior.  The cultivar Suvarna-2 is an improved high leaf yielding triploid in south India. The meiotic behavior of this cultivar has been presented here. Meiosis was highly irregular. Various anomalies such as univalent, bivalents, trivalent, hexavalent, loose association, unequal separation and precocious movement of chromosomes and laggards have been observed in pollen mother cells. These irregularities prevented the formation of viable gamete that leads to pollen sterility.

Keywords


Associations, Chromosome, Meiotic behavior, Microsprogenesis, Ploidy

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DOI: https://doi.org/10.21746/aps.2018.7.4.14

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