Somatic hybridization is performed to obtain significant cytoplasmic male sterility （CMS） lines, whose CMS genes are derived either from the transfer of sterile genes from the mitochondrial genome of donor parent to...Somatic hybridization is performed to obtain significant cytoplasmic male sterility （CMS） lines, whose CMS genes are derived either from the transfer of sterile genes from the mitochondrial genome of donor parent to the counterpart of receptor or production of new sterile genes caused by mitochondrial genome recombination of the biparent during protoplast fusion. In this study, a novel male sterile line, SaNa-IA, was obtained from the somatic hybridization between Brassica napus and Sinapis alba. The normal anther development of the maintainer line, SaNa-IB, and the abortive process of SaNa-IA were described through phenotypic observations and microtome sections. The floral organ of the sterile line SaNa-IA was sterile with a shortened filament and deflated anther. No detectable pollen grains were found on the surface of the sterile anthers. Semi-thin sections indicated that SaNa-IA aborted in the pollen mother cell （PMC） stage when vacuolization of the tapetum and PMCs began. The tapetum radically elongated and became highly vacuolated, occupying the entire locule together with the vacuolated microspores. Therefore, SaNa-IA is different from other CMS lines, such as ogu CMS, pol CMS and nap CMS as shown by the abortive process of the anther.展开更多
细胞质雄性不育(cytoplasm male sterility,CMS)在作物杂种优势中具有广泛的应用。玉米CMS系在商业玉米新品种培育及产业化中已经并必将继续发挥不可或缺的重要作用。在两个玉米自交系C7-2和PH4CV杂交后代中发现一个胞质雄性不育系CF3,...细胞质雄性不育(cytoplasm male sterility,CMS)在作物杂种优势中具有广泛的应用。玉米CMS系在商业玉米新品种培育及产业化中已经并必将继续发挥不可或缺的重要作用。在两个玉米自交系C7-2和PH4CV杂交后代中发现一个胞质雄性不育系CF3,并进一步获得其衍生不育系CZ58。表型调查和细胞学观察结果表明CF3及CZ58不育系的花药不外露,可以产生少量花粉,但花粉粒呈现不规则透明状,无活性;特异性PCR及测序结果表明CF3不育系的线粒体为S型,遗传学分析表明其雄花败育比较彻底,不育性状稳定,恢复系比较广泛,说明CF3是一种新的S型胞质雄性不育系,CF3及其衍生系CZ58在玉米杂交种培育与推广中具有较好的应用潜力。展开更多
基金the National Natural Science Foundation of China(31330057)the Priority Academic Program Development of Jiangsu Higher Education Institutions+1 种基金the Program of International S&T Cooperation of China(1021)the Jiangsu Province Graduate Innovation Fund(XCLX13_899),China
文摘Somatic hybridization is performed to obtain significant cytoplasmic male sterility （CMS） lines, whose CMS genes are derived either from the transfer of sterile genes from the mitochondrial genome of donor parent to the counterpart of receptor or production of new sterile genes caused by mitochondrial genome recombination of the biparent during protoplast fusion. In this study, a novel male sterile line, SaNa-IA, was obtained from the somatic hybridization between Brassica napus and Sinapis alba. The normal anther development of the maintainer line, SaNa-IB, and the abortive process of SaNa-IA were described through phenotypic observations and microtome sections. The floral organ of the sterile line SaNa-IA was sterile with a shortened filament and deflated anther. No detectable pollen grains were found on the surface of the sterile anthers. Semi-thin sections indicated that SaNa-IA aborted in the pollen mother cell （PMC） stage when vacuolization of the tapetum and PMCs began. The tapetum radically elongated and became highly vacuolated, occupying the entire locule together with the vacuolated microspores. Therefore, SaNa-IA is different from other CMS lines, such as ogu CMS, pol CMS and nap CMS as shown by the abortive process of the anther.
文摘细胞质雄性不育(cytoplasm male sterility,CMS)在作物杂种优势中具有广泛的应用。玉米CMS系在商业玉米新品种培育及产业化中已经并必将继续发挥不可或缺的重要作用。在两个玉米自交系C7-2和PH4CV杂交后代中发现一个胞质雄性不育系CF3,并进一步获得其衍生不育系CZ58。表型调查和细胞学观察结果表明CF3及CZ58不育系的花药不外露,可以产生少量花粉,但花粉粒呈现不规则透明状,无活性;特异性PCR及测序结果表明CF3不育系的线粒体为S型,遗传学分析表明其雄花败育比较彻底,不育性状稳定,恢复系比较广泛,说明CF3是一种新的S型胞质雄性不育系,CF3及其衍生系CZ58在玉米杂交种培育与推广中具有较好的应用潜力。
