Comparative Karyotype Analysis in Five Strains of <i>Colocasia esculenta</i> (L.) Schott (Araceae) in Thailand

Abstract

Cytogenetical studies were carried out on Colocasia esculenta (L.) Schott and five different karyotypes were observed, karyotype formula of each karyotype were 2n=28=L 24 m +M 4 sm , 2n=28=L 14 m +L 2 sm +M 6 m +M 6 sm , 2n=28=L 22 m +L 6 sm , 2n=28=L 18 m +M 4 m +M 2 sm +S 2 sm +S 2 sm and 2n=28=L 8 m +L 4 sm +M 4 m +M 10 sm +S 2 m. The karyotype of five strains had same chromosome number of 2n= 28 and fundamental number (NF)= 56. Therefore, all of the five strains had a symmetrical karyotype that consisted of metacentric and submetacentric chromosomes. The differences among karyotypes were caused by number of metacentric and submetacentric chromosomes. The chromosome number of C. esculenta had been reported, but this is the first report of karyotype variation among strains.

Karyological Study in Three Thailand Species of <i>Colocasia</i> (Araceae)

“…Species of Araceae are difficult to identify because of the large variation of each species such as C. esculenta (three and five varieties), C. fallax (three varieties), Lasia spinosa (three varieties) and Xanthosoma violaceum (two varieties). Therefore, several cytologists such as Alam and Deen (2002), Sultana et al (2006), Begum and Alam (2009), Deen and Alam (2002) and Senavongse et al (2018) are studied chromosomes for classification of varieties of certain species. In the case of closely related species with the same number of chromosomes, karyotypes were used to identification of species.…”

“…Since the first cytological contribution on C. gigantea by Nakajima (1936) Colocasia species were extensively studied on their chromosome numbers. Karyotypes were reported in eight species (Okada and Hambali 1989, Sreekumari and Mathew 1991, Cao and Long 2003, 2004, Yang et al 2003, Parvin et al 2008, Das et al 2015, Senavongse et al 2018. In the three species of C. fallax, C. gigantean, and C. lihengiae, chromosome number and karyotype have been reported (Nakajima 1936, Larsen 1969, Moore 1973, Tanimoto and Matsumoto 1986, Okada and Hambali 1989, Long and Liu 2001, Yang et al 2003, Cao and Long 2004, Begum and Alam 2009 (Table 1).…”

Profiling Cultivars Development in Kersting's Groundnut [Macrotyloma geocarpum (Harms) Maréchal and Baudet] for Improved Yield, Higher Nutrient Content, and Adaptation to Current and Future Climates

“…Understanding the appropriate karyotype is important for characterizing genomes of a species and for identifying closely related species (Saensouk and Saensouk, 2018;Senavongse et al, 2018). Kersting's groundnut is a diploid species for which, different numbers of chromosomes were reported for the wild and cultivated types (Pasquet et al, 2002).…”

Worldwide Research Trends on Microalgae and Recent Work in Cytologia

“…Some examples of local plant research include the cytology of male meiosis in 17 species in 11 genera of the family Poaceae from Haryana and the Shiwalik hills (Dhaliwal et al 2018b), a cytomorphological study of important medicinal plants of Cenchrus L. from north India (Dhaliwal et al 2018a), a comparative karyotype analysis of five strains of Colocasia esculenta in Thailand (Senavongse et al 2018), chromosome reports for 26 species of Asteraceae from cold deserts of the western Himalayas (Gupta et al 2018), male meiosis in 29 species of Lamiaceae from the Sirmaur district, Himachal Pradesh, India (Singh et al 2018), and new chromosome reports on Commelinaceae from Indian hot desert in Rajasthan (Kaur and Gupta 2018).…”