水稻产量因素的遗传特性对产量影响

以春承101和长白20两个水稻品种为试验材料,连续3 a在其适应地区多点正常栽培条件下,研究穗的大小、粒数多少以及千粒重等遗传特性对产量的影响。试验结果表明,产量与穗数、粒穗、结实率,无论单相关还是偏相关均达到显著和极显著水平。穗长与穗粒数未达到显著水平,由此可见,穗长不一定穗粒数多。因此,初步明确了丰产性好的水稻品种主要源于分蘖力强、成穗率好,穗粒数多,结实率高,对如何选育高产稳产型水稻品种提供了具有参考价值的数据。

Effect of Genetic Characteristic on Rice Yield

The effect of spike size, grain number and thousand seed weight on yield were researched which use Chuncheng-101 and Changbai-20 as testing material at the condition of usual cultivation condition for three consecutive years. The result indicated that number of spike, number of grain per spike and setting percentage were significantly influenced by yield. Panicle length and grain number below the significant level, so we can draw conclusion that large spike size don＇t represent more grain number. Then we can achieve a preliminary report that yield come from tillering ability, productive tiller percentage, grain number and setting percentage, it gave a valuable reference to breeding rice variety with higher and stable yield.