Abstract
Meiotic studies were reported inTrilobachne cookei (Stapf) Schenck ex Henr. for the first time. Chromosome number was found to ben=10. This is not in agreement with one of the earlier reports of 2n=10 but confirms the more recent report of 2n=20. Several hundred cells were examined at various stages of meiosis in many plants. Meiosis was regular, and pollen fertility and seed set were high. But irregularities like univalents, aneuploid numbers, quadrivalents, secondary association of bivalents into groups, interlocking of bivalents, pseudocytomixis, bridges, laggards and micronuclei were found in a low proportion of the cells. Two pairs of satellited chromosomes were present in the somatic metaphase plates. These facts taken together with the previous report of 2n=10 indicate the probable tetraploid nature of the present material. Intergeneric crosses attempted betweenTrilobachne and maize, teosinte, tripsacum and job’s tears (some of the other members of the tribe Maydeae) did not succeed.
This is a preview of subscription content, log in via an institution to check access.
Similar content being viewed by others
References
Anonymous 1960–61 Annual Report, Maharastra Association for the Cultivation of Science, Poona
Bhagwat S D and Deodikar G B 1961Trilobachne, an imperfectly known genus. In Professor S P Agharkar Commemoration Volume ed T S Mahabale (Poona: University of Poona) 139–144
Bor N L 1960 Grasses of Burma, Ceylon, India and Pakistan (New York: Pergamon Press)
Cameron J W 1943 Chromosomes of a maize relative,Polytoca macrophylla Benth;Am. J. Bot. 30 776–778
Chandravadana P and Galinat W C 1976 Comparative cytology of certain Maydeae and Andropogoneae genera in reference to their evolution;J. Hered. 67 161–166
Harada K, Murakami M, Fukushima A and Nakazima M 1954 Breeding study on the forage crops: Studies on the intergeneric hybridization between the genusZea andCoix (Maydeae). I (In Japanese with English summary);Sci. Rep. Saiko Univ. Agric. No.6 139–145
Harada K, Umekage O and Nakazima M 1955 Studies on the intergeneric hybridization between the genusZea andCoix (Maydeae), (In Japanese);Jpn. J. Breed. 4 288
Koul A K and Paliwal R L 1965 Cytogenetic basis for taxonomic rearrangement of the tribe Maydeae (family Gramineae);Kashmir Sci. 2 114–121
Mangelsdorf P C and Reeves R G 1939 The origin of Indian corn and its relatives;Texas Agric. Exp. Sta. Bull. No. 574
Nowacki E, Aniol A and Bieber D 1972 An attempted cross ofZea mays andCoix lacryma-job. and the serological relationships of these species:Bull. l’Acad. Polanaise Sci. 20 695–697
Rao P N 1975 Male sterility inChionachne koeniqii;Maydica 20 197–202
Sapre A B 1977 Karyotype ofTrilobachne cookei (Stapf) Schenck Ex Henrard;Curr. Sci. 46 357
Venkateswarlu J 1962 Origin of maize in proceedings of Summer School in Botany (eds P Maheshwari, B M Johri and I K Vasil) 494–504
Venkateswarlu J 1963 Cytogenetic evolution in Angiosperms—Maydeae;Mem. Indian bot. Soc. 4 65–73
Venkateswarlu J and Chaganti R S K 1965 Apomixis inCoix;Maize News Lett. 39 183
Venkateswarlu J, Chaganti R S K and Rao P N 1976 Pachytene chromosome morphology and its bearing on interspecific and intergeneric relationships ofCoix;Bot. Mus. Leafl. Harvard Univ. 24 205–224
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
Venkateswarlu, J., Rao, P.N. & Narayana, D.S. Cytological study ofTrilobachne cookei (Stapf) Schenck ex Henr. (Tribe Maydeae). Proc. Indian Acad. Sci. 86, 295–301 (1977). https://doi.org/10.1007/BF03050953
Received:
Revised:
Issue Date:
DOI: https://doi.org/10.1007/BF03050953