MORPHOLOGICAL VARIATION OF THE ECOTYPES OF Echinochloa crus-galli var crus-galli (L). Beauv (Barnyard grass: Poaceae) IN MALAYSIA and INDONESIA

摘要: Greenhouse experiments were conducted to examine the morphological traits of barnyard grass ecotypes from diverse geographic origin. Seeds (caryopsis) collected 17 locations of  rice fields throughout Malaysia (11 states) and Indonesia (six provinces) grown in pots each  containing 10 kg paddy field soil. The arranged using completely randomized design (CRD) with five  replicates. Mean separation was calculated Duncan multiple range test at 5% probability level. Unweighted pair-group method arithmetic averages (UPGMA) performed determine individual relationship within grass. Twelve such as culm, panicle, leaf, spikelet measured. growth characters emergence date, heading time, duration also evaluated. average Perils, Kedah, Penang, Johor relatively earlier than other ecotypes. Six groups classified based on cluster analysis Malaysian Principal component  indicated that group six found be highly variable compared others. While three identified Indonesian Group one observed variable. Results demonstrated variation among  showing differences between two regions illustrate role variation. Key words : Variation / weeds