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利用典型的籼粳交(窄叶青8号/京系17)的F1代花培加倍单倍体(DH)分离群体为材料,通过水培法在齐穗期考查了与抗倒伏相关根基粗等性状。根基粗在DH群体中呈明显的连续性变异分布。根基粗总平均数与10、20、30、40、50、60、70、80、90、100个最粗根基粗平均数均存在极显著正相关,且根基粗总平均数(Y)与10~100个最粗根基粗平均数(X)两者关系符合直线回归方程Y=a+b X。根基粗总平均数与30、40个最粗根基粗平均数的相关系数最大。根基粗与水稻抗倒伏相关的地下部根系性状以及地上部性状的相关分析表明,根基粗与总根数、最大根长、根干物质量、根冠比等根系性状之间存在着极显著正相关;除分蘖数外,根基粗与地上部株高、株周长、单蘖直径、地上部干物质量之间也存在着极显著正相关。根基粗与地上部性状的多元回归分析表明,根基粗只与单蘖直径、地上部干物质量成显著线性关系,这说明单蘖直径和地上部干物质量对根基粗的影响较大。本研究旨在寻求水稻根基粗的最适调查方法,为水稻根系育种提供理论参考。
A typical hybrid progenies of japonica and japonica hybrids (ZY-8 / Jing-17) were used to study the effects of lodging resistance Other traits. The root thickness of DH population showed significant continuous variation distribution. The total number of root rough average and 10,20,30,40,50,60,70,80,90, 100 the roughest base average there is a significant positive correlation, and the root of the total number of rough average (Y) and 10 The relationship between the average number of ~ 100 roughed roots (X) and the linear regression equation is Y = a + b X. The correlation coefficient between the total number of root rough and the average number of rough average of 30 and 40 was the highest. The correlation analysis of the root traits and the aboveground traits related to lodging resistance in rice roots showed that there was a significant positive correlation between root thickness and total root number, maximum root length, root dry matter weight and root / shoot ratio. . Except for the number of tillers, there was also a significant positive correlation between root thickness and shoot height, plant perimeter, single tiller diameter and shoot dry weight. The multivariate regression analysis of the root and aboveground traits showed that the root diameter had a significant linear relationship with the diameter of the single tiller and the dry matter weight of the shoot, indicating that the single tiller diameter and the aboveground dry matter had a significant effect on the root thickness. The purpose of this study is to find the optimal method for rice root rough survey and to provide a theoretical reference for rice root breeding.