Abstract
Two mulberry varieties, namely, S 34 and Tr- 10 were selected for cytomorphological studies. Stomatal frequency, somatic chromosome number, ploidy level and meiotic behaviour were studied for these varieties. S 34 is diploid with 2n=28 and Tr- 10 is triploid with 2n=42 chromosomes. Meiosis was irregular. Various anomalies like univalents, bivalents, trivalents laggards, loose association and unequal separation of chromosomes were observed in some pollen mother cells (PMCs) studied. Stomatal frequency was found to be lesser in triploid when compared to diploid variety. Keywords: Mulberry ( Morus spp.), stomatal frequency, diploid, triploid, mitosis, meiosis African Journal of Biotechnology , Vol 13(22) 2203-2207
Highlights
Mulberry is an outstanding bio energy plant of the familyMoraceae
In addition to being fed to silkworms (Bombyx mori L.) mulberry is used in industry, medicine, aquaculture, agro-forestry, social forestry and drought prone area development programmes (Dandin et al, 1992; Munirajappa et al, 1995)
Stomatal frequency was determined by nail polish impression method
Summary
S34 and Tr-10 were selected for cytomorphological studies. Somatic chromosome number, ploidy level and meiotic behaviour were studied for these varieties. S34 is diploid with 2n=28 and Tr-10 is triploid with 2n=42 chromosomes. Bivalents, trivalents laggards, loose association and unequal separation of chromosomes were observed in some pollen mother cells (PMCs) studied. Stomatal frequency was found to be lesser in triploid when compared to diploid variety
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