INTERNATIONAL JOURNAL OF AGRICULTURAL TECHNOLOGYVolume 16, No. 01, Month JANUARY, Year 2020, Pages 199 - 206
Improving photoperiod insensitivity of a thai upland rice variety by marker-assisted foreground selection
Watcharin, S., Kanrob, P., Charassri, N. and Nattapon, J.
Abstract Download PDFGlobal warming might increase climate variability with abnormal rainfall
distributions. Photoperiod insensitive upland rice can be grown early or late in the rainy season,
and to help the stabilize upland rice yields and reduce the risks to farmers. The SSR markerassisted
backcrossing method was applied to breed photoperiod insensitivity into the Thai
superior upland rice variety cv. Dawk Pa-yawm as the recurrent parent. The donor parent was
photoperiod insensitive Taichung 65, a japonica variety. The photoperiod insensitivity gene hd1
was identified using the RM8225 marker in seedling stage of F1, BC1F1, BC2F1 and BC2F2
plants. The photoperiod insensitive BC2F2 plants that flowered were selected during long day
length. The results demonstrated successful use of genetic markers to alter the photoperiod
insensitivity trait of an elite rice variety.
DNA marker, Backcross breeding, Oryza sativa L., SSR