Khao Dawk Mali 105

A fragrant local rice found in Chonburi in 1945 was the starting point; in 1951, 199 panicles were collected in neighbouring Chachoengsao for pure-line selection. The best line was named Khao Dawk Mali 105 and released to farmers in 1959.

It is photoperiod-sensitive: it flowers only when days shorten below about 11 h 52 min, so it blooms in late October and is harvested from November — a trait suited to rainfed lowlands. Its brown rice measures about 7.5 × 2.1 mm; milled dimensions here are estimated from the long-grain class. The Rice Department later used it as the parent of gamma-ray mutants, among them RD6.