Indian Journal of Science and Technology

Open Access Open Access  Restricted Access Subscription Access

Spontaneous Desynapsis in Corchorus fascicularis Lamk. (Family: Tiliaceae)


Affiliations
1 Department of Botany, Genetics and Plant Breeding Section, University of Kalyani, Kalyani-741235, India
 

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< 14-1.40%, 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.

Keywords

Corchorus Fascicularis, Desynapsis, Medium Strong Type, Monogenic Recessive, Morphological Variations, Cytomixis, Aneuploidy, High Male Fertility
User

  • Basak SL and Paria P (1979) Desynapsis and spontaneous trisomy in jute (Corchorus olitorius L.). Theor. Appl. Genet. 56, 253-256.

  • Burnham CR (1962) Discussion in Cytogenetics. Burgess Publ. Co., Minneapolis Minn.

  • Christopher J (1971) Asynapsis in Paspalum Linn. Nucleus. 14, 116-118.

  • Datta AK and Biswas AK (1985) An EMS induced bushy mutant of Nigella sativa L. with desynaptic behaviour of chromosomes. Cytologia. 50, 535-543.

  • Ehrenberg C (1949) Studies on asynapsis in the elm, Ulmus glabra. Hereditas. 35, 1-26.

  • Jones A (1970) Asynapsis in Ipomoea gracilis. J. Heredity. 25, 151-152.

  • Koduru PRK and Rao MK (1981) Cytogenetics of synaptic mutants in higher plants. Theor. Appl. Genet. 59, 197-214.

  • Levan A (1940) The cytology of Allium amplecteus and the occurrence in nature of its asynapsis. Hereditas. 26, 353.

  • Li HW, Pao WK, and Li CH (1945) Desynapsis in the common wheat. Amer. J. Bot. 32, 92-101.

  • Palve SM, Sinha MK and Chattopahdyay S (2004) Genetic variability for fiber strength and fitness in wild relatives of genus Corchorus. In: Proc. Nat. Seminar on diversified uses of Jute and Allied Fiber Crops (eds. Hazra SK and Karmakar PG), pp: 99-103. Barrackpore, Kolkata.

  • Person C (1955) An analytical study of chromosome behaviour in a haploid wheat. Can. J. Bot. 33, 11-30.

  • Poddar S, Datta AK and Dana S (1998) Cytogenetics of desynaptic mutants in homozygote stock of Rhoeo spathacea var. Concolor. The Nucleus. 41, 115-119.

  • Prakken R (1943) Studies of asynapsis in rye. Hereditas. 29, 475-495.

  • Ramalingam SR (1977) Note on the induced asynaptic mutant in Capsicum annuum L. Sci. Cult. 43, 237-238.

  • Reiger R, Michaelis A and Green MM (1976) Glossary of Genetics and Cytogenetics, 4th edn. Berlin, Heidelberg, New York, Springer.

  • Riley R and Law CN (1965) Genetic variation in chromosome pairing. Adv. Genet. 13, 57-114.

  • Saha A and Datta AK (2002) Synaptic mutants with phenotypic marker trait in Black Cumin (Nigella sativa L.). Plant Archives. 2, 147-150.

  • Sengupta K, Pal A and Datta AK (1999) Environmental stress induced desynapsis in Capsicum annum L. and in Solanum americanum M. J. Natl. Bot. Soc. 53, 39-43.

  • Sharp LW (1930) Introduction to Cytology. New York.

  • Sjodin J (1970) Induced asynaptic mutants in Vicia faba L.Hereditas. 66, 215-232.

  • Soost RK (1951) Comparative cytology and genetics of asynaptic mutants in Lycopersicon esculentum L. Genetics. 36, 410-434.

  • Maity S and Datta AK (2009) Meiosis in nine species of Jute (Corchorus). Indian J.Sci.Technol. 2 (2), 27-

  • Domain site:http://www.indjst.org.


Abstract Views: 363

PDF Views: 82




  • Spontaneous Desynapsis in Corchorus fascicularis Lamk. (Family: Tiliaceae)

Abstract Views: 363  |  PDF Views: 82

Authors

Susmita Maity
Department of Botany, Genetics and Plant Breeding Section, University of Kalyani, Kalyani-741235, India
Animesh K. Datta
Department of Botany, Genetics and Plant Breeding Section, University of Kalyani, Kalyani-741235, India

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< 14-1.40%, 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.

Keywords


Corchorus Fascicularis, Desynapsis, Medium Strong Type, Monogenic Recessive, Morphological Variations, Cytomixis, Aneuploidy, High Male Fertility

References





DOI: https://doi.org/10.17485/ijst%2F2009%2Fv2i3%2F29410