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本研究以典型籼粳交(春江06/台中本地l号)的Fl代花药加倍的DH群体为材料,系统考察了DH群体及其双亲在抽穗期的叶鞘长、叶鞘重、叶鞘厚等性状上的分布情况。结果表明,叶鞘长度的遗传力较高,受环境的影响相对较小,叶鞘长与叶鞘厚及叶鞘干重间大多呈极显著的正相关。QTL分析共检测到31个与叶鞘有关的QTL,分布于水稻第1、第4、第6、第8、第10和第11染色体上,其LOD值介于2.58～4.81,贡献率在7.5%～35.3%之间。其中,位于第4染色体上RM548-RM6997区间是个主效QTL座位,同时调控水稻叶鞘长、干重及叶鞘厚。进一步比较了叶鞘相关性状和业已检测到的部分产量相关性状QTL表明,叶鞘的光合功能或物质运输可能与水稻的产量形成密切相关。
In this study, DH population doubled with Fl anthers in typical indica and japonica hybrids (Chunjiang 06 / Taichung, China) was used as material to systematically investigate the effects of DH population and its parents on leaf sheath length, leaf sheath weight and leaf sheath thickness at heading The distribution of The results showed that the heritability of sheath length was relatively high and the influence of environment was relatively small. There was a significant positive correlation between leaf sheath length and leaf sheath thickness and leaf sheath dry weight. A total of 31 QTLs associated with leaf sheaths were detected in QTLs on chromosomes 1, 4, 6, 8, 10 and 11, and their LOD values ranged from 2.58 to 4.81 with a contribution rate of 7.5% ~ 35.3% between. Among them, the RM548-RM6997 interval on chromosome 4 was a major-effect QTL locus and regulated the leaf sheath length, dry weight and leaf sheath thickness. Further analysis of QTLs for leaf sheath-related traits and some of the detected yield-related traits showed that leaf sheath photosynthetic function or material transport may be closely related to rice yield formation.