Self and Crossability of Six Thailand Native Dancing Lady Gingers (Globba spp.)

Abstract

The nine species of Globba which had commercial potential characteristics were collected and used in this research. The determined chromosome numbers of the nine species were ranged from 20 to 32. The six of collected species were used for pollination. The results of self pollination of the six species represented the percentage of fruit set from 8.69 to 37.04%. The normal seeds could be obtained from their fruits except for self pollinated of G. rosea. Reciprocal crosses of G. sp. 1 × G. sp. 2 and G. xantholeuca × G. aff. Reflexa represented high crossability. G. rosea showed high crossibility when using as pollen parantal plant in G. sp. 2 cross combination. G. schomburgkii revealed no crossability as a seed parental plant. The normal seed could be obtained only in reciprocal cross between G. xantholeuca × G. aff. reflexa as an intersectional cross combination. The crossability polygons revealed that using the lower chromosome number species as seed parental plants tend to obtain higher percentage of fruit setting for intersectional crosses. Furthermore, the results could clarify self and crossabilities and pollen quality which are really useful for Globba breeding program.