Yamasaki Seiji, Matsumoto Taimei, Tomota Yuina, Watanabe Nanami, Tanaka Tatsuya
Laboratory of Plant Physiology, Science Education Research Unit, Faculty of Education, University of Teacher Education Fukuoka, 1-1 Akamabunkyomachi, Munakata, Fukuoka, 811-4192, Japan.
J Plant Res. 2025 Jan;138(1):77-93. doi: 10.1007/s10265-024-01583-8. Epub 2024 Oct 11.
Analysis of the sex expression in 10 'Lemon' (mmff) cucumber plants (Cucumis sativus L.), known to be andromonoecious, revealed that 3 plants produced female flowers with short ovaries, resembling bisexual flowers, after producing male and bisexual flowers. To investigate the heredity pattern governing these aberrant female flowers with short ovaries, F hybrid plants (MmFf) were generated through a cross between 'Dokanari-sennari' (MMFF) and 'Lemon' (mmff), and #4 (mmff) and #45 (mmFF) were meticulously selected from a pool of 45 F segregants. Analysis of the sex expression in both 10 F plants (mmff) derived from the #4 (mmff) and 10 F plants (mmFF) derived from the #45 (mmFF) revealed that 8-9 plants produced female flowers with short ovaries after producing male and bisexual flowers. Notably, no female flowers with short ovaries were produced in the plants carrying the M gene, such as 'Dokanari-sennari' (MMFF), 8 F hybrid plants (MmFf), and the 29 F segregants (M-F-,M-ff). Thus, female flowers with short ovaries may be produced in some 'Lemon' (mmff) cucumber plants and their progeny, particularly those carrying the mm genotype (CS-ACS2 genes with c.97G > T mutations), after the production of male and bisexual flowers. However, no clear genetic rules governing the occurrence of these female flowers with short ovaries were observed. This is the first report on trimonoecious cucumber plants displaying male flowers, bisexual flowers with short ovaries, and female flowers with short ovaries, all on the same plant, under the influence of the mm genotype (CS-ACS2 genes with c.97G > T mutations).
对10株已知为雄全同株的‘柠檬’（mmff）黄瓜植株（Cucumis sativus L.）的性别表达进行分析，结果显示，3株植株在产生雄花和两性花后，产生了子房短的雌花，类似两性花。为了研究控制这些子房短的异常雌花的遗传模式，通过‘Dokanari-sennari’（MMFF）与‘柠檬’（mmff）杂交产生了F1杂种植株（MmFf），并从45个F1分离群体中精心挑选出#4（mmff）和#45（mmFF）。对来自#4（mmff）的10株F2植株（mmff）和来自#45（mmFF）的10株F2植株（mmFF）的性别表达进行分析，结果显示，8 - 9株植株在产生雄花和两性花后产生了子房短的雌花。值得注意的是，携带M基因的植株，如‘Dokanari-sennari’（MMFF）、8株F1杂种植株（MmFf）和29个F1分离群体（M-F-、M-ff），均未产生子房短的雌花。因此，一些‘柠檬’（mmff）黄瓜植株及其后代，特别是那些携带mm基因型（CS-ACS2基因发生c.97G＞T突变）的植株，在产生雄花和两性花后，可能会产生子房短的雌花。然而，未观察到控制这些子房短的雌花出现的明确遗传规律。这是关于同一植株上同时出现雄花、子房短的两性花和子房短的雌花的三性同株黄瓜植株的首次报道，该现象受mm基因型（CS-ACS2基因发生c.97G＞T突变）影响。
