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采用 2个偏粳品种“光三”/C4 18的重组自交系群体 ,构建SSR标记的连锁图谱 ,并以此对水稻穗颈维管束数和产量相关性状进行了QTL(QuantitativeTraitLoci)分析。在第 1,5 ,8和 11染色体上检测到 4个控制穗颈大维管束数的QTL ,在第 5 ,9和 10染色体上检测到 3个控制穗颈小维管束数的QTL ;共检测到产量及 8个与产量相关性状的 30个QTL。通过分析穗颈维管束数与穗一、二次枝梗数 ,穗一、二次枝梗粒数 ,穗粒数 ,结实率 ,单株产量QTL在染色体上的分布及连锁关系 ,表明穗颈维管束是影响产量的重要解剖结构 ;通过增加穗颈大、小维管束数可望增加水稻“库”的容量 ,保证“流”的畅通。
A linkage map of SSR markers was constructed using two recombinant inbred lines of “Guangsan” / C418 in japonica rice variety QTL (QuantitativeTraitLoci). Four QTLs controlling the number of big vascular bundles were detected on chromosomes 1, 5, 8 and 11, and three QTLs controlling the number of vascular bundles on chromosomes 5, 9 and 10 were detected. 30 QTLs for yield and 8 yield-related traits. The distribution of QTLs on the chromosomes and the linkage relationship between QTLs of spike and neck, the numbers of spike primary and secondary branches, the number of spike primary and secondary branchlets per spike, the number of grains per spike, seed setting rate and yield per plant were analyzed. Tube bundling is an important anatomical structure that affects yield. By increasing the number of large vascular bundles and small vascular bundles, it is expected that the capacity of rice “sink” will be increased to ensure the smooth flow of “flow”.