小麦超高产单株种子生产潜力及相关性状的研究

为探讨小麦单株种子生产潜力及相关性状特征,以57个不同基因型F2代小麦超高产单株为材料,对超高产单株产量性状、相关性状间的相关、通经和回归关系进行了分析。结果表明：（1）超高产单株（≥80 g/单株）田间选择概率为0.00518%;（2）株穗数、穗粒数、千粒重、结实小穗数、穗粒重和容重与单株产量呈显著正相关,不孕小穗数呈显著负相关,株高、穗长和千粒重相关不显著;（3）株穗数对单株产量的直接贡献最大,决定单株产量的65.33%,穗粒数、穗粒重、千粒重、株粒数分别决定单株产量的19.92%、18.15%、13.72%和5.6%。≥80 g/株的单株田间选择概率为0.00518%。

Research on Potential of Grain Yield and Characters Related to It of The Super-high-yield Plant in Wheat

To explore the grain production potential and characters related to yield, this paper took 57 plants ofF2 different genotypes of super-high-yield in wheat as materials and analyzed the yield characters, thecorrelation and path and regression between related characters. The results showed that：（1） Selective probability for super-high-yield plant（≥80g/plant） was 0.00518% in field.（2）The ears per plant, the grainsper ear, 1000-grain weigh, seed setting panicles, grain weight per ear and grain density were significantlypositive correlated to yield per plant, panicles of infertility was significantly negative correlated to yield perplant, and the plant height, the ear length and the 1000-grain weight showed no significant correlation.（3）Theears per plant was the greatest contribution to the grain weight per plant and decided 65.33% of the yield, thegrain weight per ear, 1000-grain weight and the number of grains per plant decided 19.92%, 18.15% and13.72% and 5.6% of the yield respectively.Selectiveprobabilityforplant（≥80g/plant） was 0.00518%infield.