Karyotype of Some Bananas in AA and AAA Groups in Thailand

Abstract

Karyotype of 14 accessions in AA and AAA group banana were studied by using Feulgen stain technique at the Karyotype of 14 accessions in AA and AAA group banana were studied by using Feulgen stain technique at the department of Horticulture, Faculty of Agriculture, Kasetsart University from June, 2008 to July, 2009. The results showed that chromosome number 2n=22 in AA group, including Kluai Pa (Phrae), Kluai Pa Abyssinia, Kluai Pa hybrid (Rayong), Kluai Pa Pli Leuang, Kluai Dang Lek, Kluai Hom Champa, Kluai Homchan, Kluai Hom son, Kluai Khai Thong Ngoei and Kluai Sa. The AAA group 2m=33 was comprised of Kluai Hom Grand Nain, Kluai Hom Thong Thai and Kluai Nak. Chromosome size in AA and AAA groups varied from 1.20-3.75 and 1.09-3.47 microns respectively. The karyotype in AA group was consisted of metacentric and submetacentric, but excepted in Kluai Pa hybrid (Rayong) and Kluai pa Pli Leuang were found subtelocentric on the ninth chromosome pair. However in all AA group was found satellite on the first and second chromosome pairs in Kluai Khai Thong Ngoei, Kluai Dang Lek and Kluai Pa Pli Leuang. But in AAA group, the karyotype were metacentric and submetacentric, and also found satellite on the first and second chromosome pairs, except in Kluai Nak was found only on the first chromosome pair.