DELLA基因家族参与植物激素信号转导通路的调控，其中GAI (GA insensitive) mRNA还是植物体内长距离运输的信号分子。在全基因组范围内鉴定甘蓝(Brassica oleracea var. capitata) DELLA基因家族成员并分析mRNA运输特性，可为甘蓝DELLA基因家族的开发应用提供基础数据。本研究利用甘蓝基因组数据和转录组数据，在甘蓝中鉴定了5个DELLA基因家族成员(BoRGA1、BoRGA2、BoRGL1、BoRGL2和BoRGL3)，但甘蓝基因组缺失了GAI基因。采用劈接法将甘蓝(自交系G27)接穗和菜心(Brassica campestris L. ssp. chinensis var. utilis Tsen et Lee)(四九菜心)砧木嫁接在一起，构建异源嫁接体。对砧木菜心花序轴和对应位置的实生苗菜心花序轴(对照)取样进行转录组测序。在甘蓝/菜心异源嫁接体的砧木菜心花序轴的转录组测序文库中分别鉴定到8、9、3、5、1个来自甘蓝BoRGA1、BoRGA2、BoRGL1、BoRGL2和BoRGL3的外源read。甘蓝DELLA家族基因mRNA运输并没有提高砧木菜心中DELLA家族基因的转录表达水平。相关性分析显示，甘蓝DELLA家族基因mRNA运输效率与其自身的序列和接穗甘蓝中的DELLA家族基因的转录表达水平相关。本研究为深入探究甘蓝DELLA家族基因mRNA运输的分子机制奠定了基础。

DELLA gene family is involved in the regulation of signal transduction of plant hormones. mRNAs of GA insensitive (GAI), the member of DELLA gene family, are also signaling molecules of long-distance transport in plants. Genome-wide identification and mRNA transport analysis of the members of DELLA gene family in head cabbage (Brassica oleracea var. capitata) can provide basic data for their application in head cabbage. In this study, five members of DELLA gene family (BoRGA1, BoRGA2, BoRGL1, BoRGL2, and BoRGL3) were identified in head cabbage using genome and transcriptome data. However, head cabbage lacked a GAI gene in its genome. The scion (head cabbage, inbred line G27) and the rootstock Chinese flowering cabbage (Brassica campestris L. ssp. chinensis var. utilis Tsen et Lee) (sijiucaixin) were cleft-grafted together to produce the heterograft. Inflorescence stem of the rootstock and the corresponding inflorescence stem in Chinese flowering cabbage seedlings (as controls) were purified and analyzed with transcriptome sequencing. The total of 8, 9, 3, 5, and 1 exogenous read(s), derived respectively from BoRGA1, BoRGA2, BoRGL1, BoRGL2, and BoRGL3, were identified in the transcriptomes of the rootstocks. Nevertheless, mRNA transport of DELLA family genes from scion to rootstock did not increase the transcriptional level of the members of DELLA gene family in the rootstocks. Correlation analysis suggested that mRNA transport efficiency of the DELLA family genes was correlated with the sequence and the transcriptional level of the respective DELLA gene in the scion (head cabbage). This study lays the foundation for further investigation on the molecular mechanism of mRNA transport of the members of DELLA gene family in head cabbage.