水稻籼光交和籼籼交杂种优势的初步研究Ⅰ.杂种农艺性状的表现

A preliminary study on heterosis of the hybrid rice of indica/nuda and indica/indica Ⅰ.the performance of agronomic traits

对三明沙县与海南三亚两地的籼光交和籼籼交杂种的农艺性状进行了初步研究。光身稻和籼稻杂交而成的籼光交组合F1代表现为穗大粒多、米质优良、产量高,具有较好的增产潜力。其中籼光交的每穗总粒数、理论产量、增产潜力等均大于籼籼交,表现出较强的杂种优势。

The agronomic traits of the hybrid rice of indica/indica and indica/nuda in Shaxian county and Sanya city were preliminarily studied. The F1 of the hybrid rice of indica/nuda had the characteristic of larger panicle, high seed set, good grain quality and high yield. The spikelets per panicl of indica/nuda hybrid was more than that of indica/indica hybrid rice. The theoretic yield of indica/nuda hybrid was higher than that of indica/indica hybrid rice, the theoretic yield of indica/nuda hybrid rice increased by 10% - 12% compared with indica/indica hybrid rice. The yield potential of indica/nuda hybrid rice increased by 40% compared with indica/indica hybrid.