据石田宏、屉原健夫报道,日本水稻栽培种的花药和柱头长度平均值,以及每朵颖花内的花粉粒数量较籼型和爪哇型品种明显低。移栽至抽穗间的日数及抽穗前30天的平均温度与彼此存在高度相关的花药长度和每朵颖花内的花粉粒数量呈显著正相关,而与柱头长度及颖花长度无相关性。但是,颖花长度与柱头长度、花药长 According to Ishida Akihiro, Katsuragi Tanaka reported that the average length of anther and stigma in Japanese rice cultivars and the number of pollen grains per spikelet were significantly lower than those of indica and javanica varieties. The days from transplanting to heading and the average temperature at 30 days before heading were significantly positively correlated with the length of anthers and the number of pollen grains per spikelet, but not with the length of stigma and spikelet length. However, spike length and stigma length, anther length