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首页> 外文期刊>Russian journal of genetics >Peculiarities of Inheritance of Pollen Fertility Restoration Trait in Sunflower with Cytoplasmic Male Sterility
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Peculiarities of Inheritance of Pollen Fertility Restoration Trait in Sunflower with Cytoplasmic Male Sterility

机译：用细胞质雄性不育的向日葵花粉生育恢复性状的遗传特性

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摘要

The progenies from crosses of a sterile VIR116A line with PET1 CMS with pollen fertility restorer RIL130, VIR210, and VIR740 lines, differing in the type of cytoplasm and the presence of diagnostic molecular markers of the Rf1 gene, were studied. The pollen of F-1 plants of all three cross combinations was highly fertile (89.9-98.3% of stained pollen grains, PG). Each of the F-2 populations (VIR116A x RIL130, VIR116A x VIR210, and VIR116A x VIR740) segregated for the pollen fertility trait in a ratio 3 (fertile) : 1 (sterile). Among fertile F-2 genotypes, "low pollen" ones were identified, in which there was less pollen than normal during a visual estimation. Their frequency was approximately 9% of the total number of plants in each of the populations, which is consistent with the results obtained previously during the analysis of other hybrid combinations. In cytological analysis, the pollen of "low pollen" plants was characterized by a decreased (as compared with highly fertile plants) frequency of fertile PG (80-100 and 11-78%, respectively) and higher content of anomalous PG (in "low pollen" plants up to 88.5%, in plants with normal level of fertility up to 18%). Using HRG01 and HRG02 molecular markers, the presence of the Rf1 dominant allele in the genotypes of fertile F-2 plants (including "low pollen" ones) was confirmed, indicating their high diagnostic value. Possible genetic mechanisms of the occurrence of "low pollen" F-2 segregants are discussed.
机译：研究了具有花粉生育恢复器RIL130，VIR210和VIR740线的PET1 CMS的无菌VIR116A系列的后代，在细胞质类型和RF1基因的存在诊断分子标记的情况下。所有三个交叉组合的F-1植物的花粉是高度肥沃的（89.9-98.3％的染色花粉颗粒，PG）。每个F-2人群（VIR116A X RIL130，VIR116A X VIR210和VIR116A X VIR740）以比例3（肥沃）：1（无菌）分离为花粉生育性。在肥沃的F-2基因型中，鉴定出“低花粉”，在视觉估计期间，在这种情况下花粉少于正常情况。它们的频率约占每个群体中植物总数的9％，这与先前在分析其他混合组合期间获得的结果一致。在细胞学分析中，“低花粉”植物的花粉的特征在于肥沃的PG（分别为80-100和11-78％的高度肥沃植物）频率下降（分别为80-100-11-78％）和更高含量的异常PG（IN）低花粉“植物高达88.5％，在植物中具有正常的生育水平高达18％）。使用HRG01和HRG02分子标记，确认了肥沃的F-2植物的基因型中RF1显性等位基因（包括“低花粉”植物），表明其高诊断价值。讨论了“低花粉”F-2分离的可能遗传机制。

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