摘要： 以北京地区近年来广泛种植的9个高产基因型为材料,研究了高产小麦茎鞘贮藏物质对穗的贡献率及其影响因子.结果表明,茎鞘贮藏物质对穗的贡献率存在基因型差异,同一基因型不同节间贮藏物质对穗的贡献率也存在显著差异,以倒2～3节间对穗的贡献率最大.茎鞘贮藏物质对穗的贡献率与株高、千粒重、茎鞘转运率抽穗后20 d的茎鞘及各节间的积累量,倒2～3节间对穗的贡献率,抽穗后20 d的灌浆速率和净同化率,以及抽穗后10 d的单茎光合面积成正相关,而与茎粗、旗叶面积不相关,与抽穗后30 d的净同化率呈负相关.

关键词: 高产小麦, 茎鞘贮藏物质, 基因型

Abstract: The cont ribution of stem reserves to ear and it s influence factors w ere studied in 9 w heat g enotypes which w ere planted in Beijing areas w idely in recent years. T he results indicated that there w ere signif icant differences in the cont ribut ion of stem reserves to ear in different geno types, the same result s w ere also found w ith dif ferent inter nodes. The inversal 2-3 inter nodes had the big gest cont ribut ion. T he cont ribut ion to ear w as posit ive correlated w ith plant height , 1000 grain w eight, t ransport rate of stem sheath and dif ferent inter node, especially peduncle and inversal 4-5 inter nodes, accumulat ion mass of stem sheath and different inter nodes, the cont ri bution to ear of inversal 2-3 inter node, grain f illing rate and net assimilat ion rate 20 days after heading and photosynthet ic areas per stem 10 days after heading. How ever, it w as not correlated w ith stem robust , f lag leaf areas, transport rate of stem sheath, and it w as negative correlated w ith net assimilat ion rate 30 days after heading .

Key words: High y ield w heat, Stem sheath reserves, Genotype

中图分类号: 

• S512

• S331