Abstract
A desynaptic mutant of Corchorus fascicularis Lamk. (Family: Tiliaceae) showing distinctive morphological variations than normal was identified from the natural population (1 out of 27 plants scored) of jute species following male meiotic analysis. Self segregation of the desynaptic plant suggested that desynapsis (mutant trait) was monogenic recessive to normal. Compared to normal plants, the spontaneous desynaptic mutant (medium strong type) demonstrated enhanced univalent frequency per cell (4.05, normal-0.31), reduced number of chiasma (6.67, normal- 7.28) and bivalent (5.12, normal- 6.99) per nucleus, few meiocytes (13.64%, normal-5.36%) with unequal separation at AI, cytologically near normal AII (94.83%, normal- 100.00%) cells and high male fertility (81.77%, normal- 92.06%). Cytomixis (prophase I/ metaphase I) was evident in both normal and mutant plants forming aneuploid (mutant: 2n 14-2.80%; normal: 2n14 - 10.22%) PMCs predominantly at MI (mutant: 4.20%, normal: 24.42%) and rarely in AI (mutant: 1.52%, normal: 1.79%) cells.
Highlights
(mutant trait) was monogenic recessive to normal
Selfed seeds of the desynaptic plant was sown in number of chiasma (6.67, normal- 7.28) and bivalent subsequent generation and genetic segregation of the
Riley and Law (1965) coined the name compared to normal plants (29 – 35 days from sowing) of
Summary
(mutant trait) was monogenic recessive to normal. Desynaptic and normal plants were designated as ds and Compared to normal plants, the spontaneous desynaptic N respectively in the text. The spontaneous desynaptic N respectively in the text. Univalent frequency per cell (4.05, normal-0.31), reduced
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