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首页> 外文期刊>日本作物学会紀事 >Genetic characteristics of the breaking strength of the basal culm related to lodging resistance in a cross between Koshihikari and Chugoku 117.
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Genetic characteristics of the breaking strength of the basal culm related to lodging resistance in a cross between Koshihikari and Chugoku 117.

机译：越光和中国地方117杂交后基茎断裂强度的遗传特性与抗倒伏性有关。

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摘要

In order to investigate the possibility of introducing lodging resistance into long culm and ear weight type rice cultivars, the genetic characteristics of breaking strength related to lodging resistance were studied in a cross between Koshihikari and Chugoku 117 with small and large section modulus, respectively, and their progenies. In the F1 plants, the mean section modulus was much higher than that in Koshihikari, while the mean of the bending stress was higher than that in Chugoku 117 as wellas that in Koshihikari. Consequently, the mean of the bending moment at breaking of the basal internode (M) in the F1 population was much higher than that in Koshihikari as well as Chugoku 117. The M in F2 ranged widely from 800 to 2900 g cm, and eight plants of F2 exceeded the maximum value of Chugoku 117. The section modulus in F2 ranged widely from 8 to 25 mm3 and showed a trimodal frequency distribution. The ratio of 30 : 92 : 28 did not fit the 1 : 2 : 1 expected for one-gene segregation. The section modulus showed a comparatively large heritability value in the F2 line, so this character was expected to be effective for selection. Despite negative genotypic correlation between section modulus and bending stress, three plants in the F2 line had very high M values due to large section modulus and large bending stress. The M and section modulus in the two F3 lines were almost large, corresponding to the selected F3 parental plants. From these results, there is a possibility of introducing lodging resistance into long culm type cultivars by individual selection.
机译：为了研究在长茎和穗重型水稻品种中引入抗倒伏性的可能性，在越光和中国棉花117的杂交中，研究了与抗倒伏性相关的断裂强度的遗传特性，分别具有小和大的截面模量。他们的后代。在F1植物中，平均断面模量远高于越光，而弯曲应力的均值则高于中极117和越光。因此，F1种群中的基节间（M）断裂时的弯矩平均值远高于越光和中国棉花117。F2中的M在800至2900 g cm的范围内，有八种植物F2的横截面超过了中国117的最大值。F2中的截面模量范围从8到25 mm3不等，并显示了三峰频率分布。 30:92:28的比例不适合单基因分离的1：2：1。截面模量在F2线中显示出较大的遗传力值，因此可以预期该特征对于选择是有效的。尽管截面模量和弯曲应力之间存在负的基因型相关性，但由于较大的截面模量和较大的弯曲应力，F2系中的三株植物的M值非常高。两个F3品系的M和截面模量几乎都很大，与选定的F3亲本植物相对应。根据这些结果，有可能通过个体选择将抗倒伏性引入长茎型栽培品种中。

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