Rice varieties were compared to see how they grow tillers and panicles. Some types focus on making more main shoots, while others make more tillers. Indica types tend to have more tillers and branches, leading to more panicles and spikelets. Japonica types have fewer tillers but wider shoot tops, affecting panicle and spikelet numbers. Different rice varieties have different ways of growing, which affects how many spikelets they produce in a given area.