对4个云南半矮秆籼稻品种主要农艺性状的遗传研究表明:(1)矮麻秔和矮沱谷的株高都受制于与sd-1等位的单一隐性基因;(2)矮麻秔、矮沱谷、毫牙坐与高秆品种杂交的F_1,以及毫安信与矮麻杭杂交的F_1经济性状具有超亲优势;(3)表型变异系数以有效穗数最大,其次为每穗实粒数、每穗总粒数和着粒密度,而一次枝梗数、结实率和穗长最小。这4个新矮源在育种中具有应用价值。 Genetic studies on the main agronomic traits of four Yunnan dwarf indica rice cultivars showed that: (1) the plant height of dwarf Minagutan and Dakuo Valley were both controlled by a single recessive gene at the sd-1 allele; (2) F_1 economic traits, such as 秔, Diantuo Valley, Thunderstorm hybrids and high-stalk breeds, and F_1 economic traits of hybridization between Maanshan and Damai-Hang had the advantage of super-parents. (3) The coefficient of phenotypic variation had the largest effective spike number, Spikelets, grains per panicle and grain density, while the number of primary branches, seed setting rate and spike length were the smallest. These four new dwarf sources have application value in breeding.