An analysis of the genetic variation in ornamental traits in hybrids of Iris dichotoma and I. domestica
An analysis of the genetic variation in ornamental traits in hybrids of Iris dichotoma and I. domestica
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DOI：
10.1007/s10681-016-1797-9
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发表时间：
2016
期刊：
影响因子：
1.9
通讯作者：
L. Ruan;Yike Gao;Qi Wu;Mu Fu;Zhanhui Yang;Qixiang Zhang
中科院分区：
文献类型：
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作者：
L. Ruan;Yike Gao;Qi Wu;Mu Fu;Zhanhui Yang;Qixiang Zhang
虹膜dichotomaandI。经多次杂交获得杂种植物，是一种具有较高观赏价值的新植物。这些杂交种经常被选择用于矮化，它们的花朵数量多，花色新颖；然而，由于缺乏基因型和表型之间的信息，选择是有限的。本研究的目的是研究花颜色的遗传分化。dichotoma,我。家蝇和它们的四个杂种[F1， F2，与i回交]。家蝇（BC1）以及回交。dichotoma (BC2)]。分析了7个表型特征：叶宽、叶数、花葶长、每茎花蕾数、外花被长、内花被长、花被颜色、花斑或花脉。花葶长度具有较高的遗传力，可在单株早代选择，有效缩短育种周期。内、外花被长度的相关系数最高，为0.867，具有遗传亲缘关系。F2s和BC1的花色变异较大，因此可以通过与BC1的重复自交选择新的花色。这些结果有利于提高其育种过程，有助于选择抗倒伏的个体、大量的花朵和新颖的花色。
Iris dichotomaandI. domesticawere repeatedly crossed to obtain hybrids, a potentially new plant with high ornamental value. These hybrids are frequently selected for dwarf scaping, their large numbers of flowers, and their novel flower color; however selection is limited because of a lack of information between genotype and phenotypes. This study was aimed at characterizing the genetic differentiation of flower color amongI. dichotoma,I. domestica, and four of their hybrids [F1, F2, backcrossing withI. domestica(BC1) as well as backcrossing withI. dichotoma(BC2)]. Seven phenotypic characteristics were analyzed: leaf width, leaf number, scape length, number of floral buds per stem, outer perianth length, inner perianth length, perianth color, and flower spots or veins. A high heritability estimate was obtained for scape length, which could be selected at early generations in individual plants, effectively shortening the breeding period. The correlation coefficient of outer and inner perianth lengths were high at 0.867, suggesting genetically linked traits. A high variation in flower color was found in F2s and BC1, hence novel color can be selected by repetitive self-crossing and BC1. These results are conducive to enhance theIrisbreeding process and contribute to selection of individuals for lodging resistance, a large number of flowers, and novel flower color.