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SSR analysis indicated that triploids were derived from nucellar apomixis; diploids were most probably from sexual crosses of haploid female gametes and alien pollen grains.
SSR分析结果表明三倍体后代来源於柑橘珠心细胞的无融合生殖,而二倍体个体很可能是单倍体的雌配子与外界花粉杂交后代。
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In this study the clubroot resistant CR DH line, susceptible inbred line 94SK of Chinese cabbage, the resistant and susceptible DNA bulks constructed from F2 individuals of CR DH line and 94SK were used to select the adaptive AFLP primer combination. AFLP analysis was performed with 256 Pst Ⅰ/Mse Ⅰ primer combinations.
为了筛选出大白菜适宜的AFLP引物组合,研究以抗根肿病大白菜双单倍体CR Shinki、感病自交系94SK及其后代F2构成的纯合抗病和纯合感病DNA混合池为材料,利用256对Pst Ⅰ/Mse Ⅰ引物组合进行了AFLP分析。
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The importance of haploid identification in wheat × maize and the differences of previous relative results were also discussed in this paper.
文中同时对小麦×玉米杂交后代单倍体鉴定的重要性,及与以前相关研究结果的差异进行了讨论。
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Fucales An order of Phaeophyta in which the haploid generation consists only of the gametes. The gametes are produced in special cavities called conceptacles, often in the inflated tips of branches of the thallus, e.g.
鹿角藻目:褐藻门的一个目,其单倍体后代只由配子组成,配子在一个称为生殖窝(通常位于叶状体分支膨大的顶端)的特殊腔中产生。
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It was confirmed that facultative apomixes is existed in coffee species based on emasculating treatment, cyto-genetic observe and SSR marker detection.
细胞遗传学观察发现咖啡四倍体类型材料(2n=4x=44)的多胚和多胚苗中含有天然的单倍体胚和单倍体小苗(2n=2X=22);去雄处理后,可见子房膨大,其中5份材料获得了果实和种子,初步说明无融合生殖现象的存在;对小粒种品种间杂交F1代个体的SSR分析,发现多胚苗中存在与母本图谱相同且不携带父本特异带的后代以及携带双亲特异带的有性后代,表明子代有仅来自母本的无融合生殖个体分离出来。 3 建立了咖啡无融合生殖的分子鉴别方法。
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arrhenotoky:产雄单性生殖
19世纪40年代在膜翅目昆虫中发现了一种特殊形式的单性生殖--产雄单性生殖(arrhenotoky). 在这种形式中未受精的卵产生单倍体的雄性后代. 发现这一特殊形式的是孟德尔的同时代人JohannDzierzon,他和孟德尔都是奥地利西里西亚地区人,