小麦多小穗新种质创新与选育方法研究

通过少小穗早熟与多小穗晚熟杂交方式创造多小穗中早熟种质,使小麦品种(系)的小穗数目和单穗粒重可大幅度提高。12个组合65个品系的小穗数平均达到25.9个,每穗结实68.3粒,单穗籽粒重量平均达到2.33g。F_1多小穗性状优势明显,表现为倾“多”遗传。F_2小穗表现出超多亲遗传现象。

A New Inherited Resource Creation of Wheat with More Spikelets and Its Breeding and Selecting Method

New wheat lines with more spikelets and medium but early mature were developed by crossing with a few spikelets but early ripe variety and a more spikelet but late ripe wheat,thus,raising the number of spikelets and grain weight per spike of wheat cultivar (lines) by a wide margin. Mean spikelet and numbers of grains and grain weight per spikelet of 65 lines of 12 combinations reached 25. 9 spikelets and 68. 3 grains. Per single spike grain weight was 2. 33 g on an average. The more spikelet character inheritance tended to show clearly hybrid vigor in F1 and a phenomenon of more spikelet super-parent in F2.