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Chong Wang, Yang Song, Mingqian Wang, Jiajun Lei, Li Xue, and Shizhong He

-promising double-flowered individual, ‘WZ 18’, was evaluated in the greenhouse. It was named C. miniata ‘Red Peony’ in 2017. The morphological characteristics observed include leaf length and width, flower color and size, flower number per inflorescence, petal

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Ting Zhou, Hao Jiang, Donglin Zhang, Junjun Fan, Long Zhang, Guibin Wang, Wangxiang Zhang, and Fuliang Cao

Jiangsu, China). It has an umbellate inflorescence, plump buds (1.6–2.0 cm) ( Fig. 1B ), and large-diameter flowers (≈5.5 cm) that are highly doubled (14–22 petals) with a deep cup shape and with numerous pistils (≈20) and stamens (≈45). Petals are

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Mingyue Bao, Minmin Liu, Qingxia Zhang, Tonglin Wang, Xia Sun, and Jinguang Xu

Flower color is an important characteristic of ornamental plants that results from substances in the petal cells, such as flavonoids, carotenoids, and alkaloids; and various intracellular environmental factors such as the pH value and metal ion

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Ting Zhou, Hao Jiang, Wangxiang Zhang, Donglin Zhang, Junjun Fan, Quanquan Zhang, Guibin Wang, and Fuliang Cao

‘Brandywine’ (pink doubles), ‘Kelsey’ (red doubles), and ‘Sparkler’ (red-purple semi-doubles), resulting in a scarcity of double-type cultivars currently available. Additionally, petal colors of these existing double germplasm often fade easily, which

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Yun-Chan Huh, Seung-Ryong Cheong, and Jung-Myung Lee*

Common watermelons have an indeterminate growth habit with normal internode length, thus allowing the vine to grow indefinitely under the normal conditions. Watermelon breeders have identified four dwarf genes (dw-1, dw-1 s , dw-2, dw-3) and used these for developing dwarf watermelon cultivars. We discovered a naturally occurring new dwarf and seedless mutant (NDSM) from a landrace cv. Mudungsan that had been cultivated in the Mountain Mudung area nearby Gwangju City in Korea. The progenies of this mutant segregated in a ratio of 3 vine to 1 dwarf indicating a single recessive gene nature. Morphological characteristics of the NDSM were markedly different from those of the four known dwarf genotypes. NDSM plants grow shorter than 1 m in length with fan-shaped leaves and have fewer leaf lobes than normal plants, which could be clearly distinguished at 2 or 3 true leaf stage. Male and female flowers have just one petal and failed to open completely even at the anthesis. Even though there were some fertile pollen grains, the fruits of NDSM had no seed after fertilization. The F2 progenies, obtained from crossing `920533' (normal vine type) and NDSM, segregated in a ratio of 3 vine to 1 dwarf. All F1 plants from crosses between 2 dwarf types, `Sugar Bush' (dw-1dw-1) and `NH 9' (dw-2dw-2), and NDSM were normal, while F2 showed 9 vines, 3 dw-1 or dw-2 types, 3 NDSM types, and 1 double dwarf. The backcross generation segregated in a ratio of 1 vine to 1 dwarf. These results indicate that the genes for the NDSM and 2 dwarf types are non-allelic. We named this new dwarf genotype (NDSM) as dw-4 in addition to four dwarf genes previously identified.

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Chin-Mu Chen and Der-Ming Yeh

Taoyuan District Agricultural Research and Extension Station. A double-flowered mutant was identified from a self-pollinated ‘Pacifica Polka Dot’ population. Because of showy double petals and compact characteristics, the plant was selected, mass

Open access

Fengfeng Du, Xiaojing Liu, Yajun Chang, Naiwei Li, Yuesheng Ding, and Dongrui Yao

months, from mid-June to August in Nanjing, Jiangsu Province. The deep purple-red flower buds are nearly spherical in shape. The flowers are double layered, and each flower has 98 to 139 petals, arranged compactly in a bowl shape. The entire petal

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Binjie Xu, Yongxia Chen, Wangxiang Zhang, and Donglin Zhang

was selected in Spring 2014. The single plant had abundant bright purple flowers with a diameter larger than 5.0 cm. The flowers of semi-double petals have a deep cup pattern similar to the hemline on a skirt. It was temporarily named ‘Luokeke Nüshi

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Shuyin Liang, Xuan Wu, and David Byrne

flower type of single (5–8 petals) vs. double flowers (petal number greater than 8) is controlled by a major gene with the double-type condition being a dominant gene ( Debener, 1999 ). Thus, as the number of petals in single flowers does not vary

Open access

Dingmeng Hu, Jingwei Xu, Youji Han, Xingjian Dun, Lihui Wang, and Shengxiang Zhu

≈1200 crabapple varieties, with about 100 commonly supplied in today’s global market. Unfortunately, double-petal varieties of flowering crabapples are relatively scarce ( Fiala, 1994 ). In the past 20 years, only two new double-flower crabapple