This study investigated how the ploidy level of the kiwifruit pollinizer cultivars “CK3” (diploid), “T line” (tetraploid), “Pohwa” (hexaploid) and “Chieftain” (hexaploid) affected fruit set, fruit quality, and seed formation in the tetraploid kiwifruit cultivars “Halla Gold” and “Sweet Gold” cultivated in an unheated greenhouse in Jeju, Korea. Pollen tubes growing in the pistil reached and combined with the ovule 3 days after artificial pollination, and their patterns differed depending on the ploidy level of the pollen parent. The number of pollen tubes observed in “Halla Gold” and “Sweet Gold” pistils was significantly lower following pollination by “CK3” than with the other pollen donors. In all pollen treatments, the fruit set rates were > 90%. The fruit weight of both “Halla Gold” and “Sweet Gold” were high following pollination with “Chieftain” and “Pohwa”. The dry matter content, soluble solids, and acidity were not significantly different among all pollination treatments. Fruit firmness was higher following pollination with “Chieftain” and “Powha.” Colorimeter h ˚ values for flesh of “Halla Gold” was low following pollination with “CK3,” but there were no differences for “Sweet Gold” among all pollinations. The number of seeds showed a similar trend to fruit weight, but the 100-seed weight was highest with “T line” as the pollinizer. The results indicate that the ploidy level of the pollen donor affects fruit quality more than fruit set. Also, the pollen most suitable for cultivation of “Halla Gold” and “Sweet Gold” is considered to be tetraploid “T line” and hexaploid “Pohwa” and “Chieftain,” which showed favorable effects on the weight and firmness of fruits, and the number and weight of seeds without adversely influencing fruit set and dry matter content.

中文翻译：

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黄肉猕猴桃坐果、品质和种子形成对花粉供体倍性水平的响应

本研究调查了猕猴桃传粉品种“CK3”（二倍体）、“T系”（四倍体）、“Pohwa”（六倍体）和“Chieftain”（六倍体）的倍性水平如何影响坐果、果实质量和种子形成在韩国济州的一个不加热温室中栽培的四倍体猕猴桃品种“Halla Gold”和“Sweet Gold”中。人工授粉3天后，雌蕊中生长的花粉管到达并与胚珠结合，其模式因花粉亲本的倍性水平而异。在“Halla Gold”和“Sweet Gold”雌蕊中观察到的花粉管数量在“CK3”授粉后显着低于其他花粉供体。在所有花粉处理中，坐果率> 90%。“Halla Gold”和“Sweet Gold”在与“Chieftain”和“Pohwa”授粉后的果实重量都很高。所有授粉处理的干物质含量、可溶性固体和酸度没有显着差异。用“Chieftain”和“Powha”授粉后果实硬度更高。用“CK3”授粉后，“汉拿金”果肉的色度计 h ˚ 值较低，但“甜金”在所有授粉中没有差异。种子数与单果重的趋势相似，但以“T系”为授粉媒介的百粒重最高。结果表明，花粉供体的倍性水平对果实品质的影响大于坐果。还，