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以水稻越富与旱稻IRAT109杂交获得的120个粳-粳重组自交系为材料,旱田种植在自建的根管中,考察抽穗期的根数、根基粗等6个性状,同时计算根茎比(地下部分鲜重/地上部分鲜重)。计算各性状间及其与根茎比之间的相关系数并进一步进行根系性状和地上部分生物重的通径分析。结果表明:根数与根茎比无相关性,根基粗与根茎比之间达极显著正相关,相关系数为0.317;根长与根茎比达到显著相关,相关系数为0.227;根鲜重、根干重和根体积与根茎比亦达到显著正相关,相关系数分别为0.631,0.447和0.488。对高根茎比和低根茎比株系根系进行比较,除根数外,其他性状的均值均为根茎比大的株系大于根茎比小的株系,说明根茎比可以作为作物根系抗旱性的一个指标;根鲜重、根干重和根长对地上部分生物重贡献较大。
120 japonica-japonica recombinant inbred lines obtained from the crossing between rice richer rice and upland rice IRAT109 were used as materials. Six kinds of traits, including root number and root number at heading stage, were planted in self-built root canal. (Fresh part of the ground floor / fresh part of the floor). The correlation coefficients between the traits and rhizome ratios were calculated and the path analysis of root traits and aboveground biomass was conducted. The results showed that there was no correlation between root number and root ratio, and the correlation coefficient was 0.317. The correlation coefficient was 0.227. The root fresh weight and root dry weight Root weight and root volume also reached a significant positive correlation, the correlation coefficients were 0.631,0.447 and 0.488. Compared with the root systems of high rhizome ratio and low rhizome ratio, the average of other characters except rhizome was higher than rhizome ratio, indicating rhizome ratio could be used as an indicator of drought resistance in crop roots Root fresh weight, root dry weight and root length contributed a lot to the aboveground biomass.