Phenotypic difference among Australian perennials (Jpn1 and Jpn2 ), and Australian annual (P27, S16.5502, E145.2323, collection in Mareeba, Queensland). All scale bars are 1 mm. a. Spikelets of Jpn1, Jpn2, and P27 (left to right), compared with Asian O. rufipogon (W137) as a control. P27 was a typical annual strain belonging to O. meridionalis.A: hulls, b. Spikelet of Jpn1 carrying relatively longer anther compared to other types of Australian wild rice. c. Spikelet of Jpn2 carrying a shorter anther, similar to O. meridionalis. d. Number of spikelets obtained from Jpn1 and Jpn2 grown under glass house and field conditions. Repetitive number was four panicles. Standard Error bars are shown. Number of spikelets differed significantly between Jpn1 and Jpn2 (P = 0.05) under either condition. e. Number of spikelets on the 1st rachis (black bars) and the 2nd rachis (open bars) obtained from Jpn1 and Jpn2 grown under green house and field conditions. Standard error bars are shown. When compared with the number of spikelets on the first rachis, there was a significant difference (P = 0.05) only under field conditions. The number of spiekelts on the second rachis differed significantly in Jpn1 and Jpn2, only under glass house condition (P = 0.05).