摘要
为丰富水果型黄瓜种质资源,本研究以水果型黄瓜'金童'和'白玉王'为亲本构建了重组自交系,获得了由145个株系组成的F4群体.研究发现,群体中商品瓜果实颜色分为乳白、黄白、白绿、浅绿、绿、深绿、墨绿色7种,且果实颜色分离呈正态分布;群体中商品瓜果形差异较大,其中,商品瓜长度在8～24 cm范围内,均值为14.75 cm.商品瓜横径在2～8 cm范围内,均值为5.02 cm芳香物质含量分析表明,群体中己醛、(E)-2-己烯醛、1-己醇、(E,Z)-2,6-壬二烯醛、(E)-2-壬烯醛、(Z,Z)-3,6-壬二烯醛对黄瓜香味贡献较大.主成分分析结果表明,群体中商品瓜果实芳香物质主成分1和主成分2分别为(E,Z)-2,6-壬二烯醛和(Z,Z)-3,6-壬二烯醛,且累计值为76.70%.相关性分析结果表明,己醛的含量与2-己烯醛的含量显著性相关(E,Z)-2,6-壬二烯醛的含量与(E)-4-壬烯醛,(Z,Z)-3,6-壬二烯醛,(E)-2-壬烯醛,(E,E)-2,4-壬二烯醛的含量存在显著性相关.以果形指数、单瓜重、种子腔占比、可溶性固形物含量、(E,Z)-2,6-Nonadienal含量、感官评分作为考察指标建立评价模型,在F4群体中共选育出7株果实颜色鲜亮,风味浓郁,口感偏甜的株系,编号为67号、11号、69号、73号、94号、111号、127号.
Abstract
To enrich the germplasm resources of fruity cucumbers,this study constructed a recombinant inbred line with fruity cucumbers'Jintong'and'Baiyuwang'as parents,resulting in an F4 population consisting of 145 lines.The results showed that the fruit color of the commercial melons in the population was divided into seven types:milky white,yellow white,white green,light green,green,dark green,and deep green,with the fruit color segregation showing a normal distribution.There was significant variation in the shape of the commercial melons,with lengths ranging from 8 to 24 cm,an average of 14.75 cm,and diameters ranging from 2 to 8 cm,with an average of 5.02 cm.Analysis of aromatic compounds indicated that hexanal,(E)-2-hexenal,1-hexanol,(E,Z)-2,6-nonadienal,(E)-2-nonenal,and(Z,Z)-3,6-nonadienal significantly contributed more to the cucumber fragrance.Principal component analysis showed that the first and second principal components of aromatic compounds in the commercial melons were(E,Z)-2,6-nonadienal and(Z,Z)-3,6-nonadienal,respectively,with a cumulative value of 76.70%.Correlation analysis revealed a significant correlation between the content of hexanal and(E)-2-hexenal,the content of(E,Z)-2,6-Nonadienal was significantly correlated with the content of(E,Z)-3,6-Nonadienal,(E)-2-Nonenal,(E,E)-2,4-Nonadienal.An evaluation model was established based on fruit shape index,melon weight per melon,seed cavity ratio,soluble solid content,(E,Z)-2,6-nonadienal content and sensory score.In the F4 population,seven lines with bright fruit color,rich flavor,and sweet taste were selected,with the following line numbers:67,11,69,73,94,111,and 127.
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