Abstract:

In order to elucidate the differentiation of cultivated rice,it isworthy to note whether there is any“early-season”keng rice in Yunnan,since it is generally held that the distribution of early-season kengrice is limited to north parts of the Yangtse River.Our investigationshowed that some upland rice cultivars in Yunnan are of the mid-earlyseason type,and at the same time,there are also some“pseudo-early-season”cultivars grown at high altitudes in northwest Yunnan.Theydiffer from the early-season rice by de...