Kay Gray (Plant patent 4943), released from a private breeding program in Wisconsin operated by Elmer Swenson, is listed as one of the hardiest grapes grown in the upper Midwest.

 
  • 凱灰色(植物專(zhuān)利4943),從威斯康星州的一個(gè)私人育種程序中埃爾默斯文森經(jīng)營(yíng)獲釋?zhuān)涣袨樵谥形鞑科咸逊N植的頑強之一。
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