Effect of Nitrogen and Sulfur Supply on Glucosinolates in Brassica campestris ssp.chinensis

Glucosinolates （GSs） are a group of plant secondary metabolites containing abundant nitrogen （N） and sulfur （S） mainly in Brassica and have the beneficial effects on human health including anti-carcinogenic, cholesterol-reducing and other pharmacological effects. The objective of this study was to investigate the effect of different concentrations of N （5, 10, and 20 mmol L-a, denoted by N5, N10 and N20） and S （0,5, 1, and 2 mmol L^-1, denoted by S0.5, S1 and S2） on the yield and GSs in pakchoi （Brassica campestris L. ssp. chinensis var. communis） in hydroponics. Results showed that N10 and N20 significantly enhanced the yield compared with N5, however, N20 had a negative effect relative to N10. Only with N10 and N20 low S supply （S0.5） reduced the yield. The concentrations of aliphatic GSs, aromatic GS and total GSs were enhanced by N5 and indolyl GSs were enhanced by N20. S2 enhanced the concentration of individual GS and total GSs. The concentrations of indolyl GSs were maximized in N20S2 treatment, whereas the highest concentrations of aliphatic GSs, aromatic GS and total GSs were found in N5S2 treatment. Effects of N and S on aliphatic GSs were higher than on indolyl GSs. The results suggest that the accumulation of aliphatic GSs and aromatic GS could be enhanced by low N and high S and restricted by high N while that of indolyl GSs could be enhanced by high N and high S.

Selenium-oxidizing Agrobacterium sp.T3F4 decreases arsenic uptake by Brassica rapa L.under a native polluted soil

Toxic arsenic(As)and trace element selenium(Se)are transformed by microorganisms but their complex interactions in soil-plant systems have not been fully understood.An Asand Se-oxidizing bacterium,Agrobacterium sp.T3F4,was applied to a native seleniferous As-polluted soil to investigate As/Se uptake by the vegetable Brassica rapa L.and As-Se interaction as mediated by strain T3F4.The Se content in the aboveground plants was significantly enhanced by 34.1%,but the As content was significantly decreased by 20.5% in the T3F4-inoculated pot culture compared to the control(P<0.05).Similar result was shown in treatment with additional 5 mg/kg of Se(IV)in soil.In addition,the As contents in roots were significantly decreased by more than 35% under T3F4 or Se(IV)treatments(P<0.05).Analysis of As-Se-bacterium interaction in a soil simulation experiment showed that the bioavailability of Se significantly increased and As was immobilized with the addition of the T3F4strain(P<0.05).Furthermore,an As/Se co-exposure hydroponic experiment demonstrated that As uptake and accumulation in plants was reduced by increasing Se(IV)concentrations.The 50% growth inhibition concentration(IC50)values for As in plants were increased about one-fold and two-fold under co-exposure with 5 and 10μmol/L Se(IV),respectively.In conclusion,strain T3F4 improves Se uptake but decreases As uptake by plants via oxidation of As and Se,resulting in decrease of soil As bioavailability and As/Se competitive absorption by plants.This provides a potential bioremediation strategy for Se biofortification and As immobilization in As-polluted soil.

Anti-fatigue activity of Brassica rapa L.extract and correlation among biochemical changes in forced swimming mice

Brassica rapa L.is an edible and medical plant in China used for treating various diseases,especially in the Tibet region.In this study,the chemical constituents of Brassica rapa L.extract(BE)was clarified by UHPLC-MS and anti-fatigue ability of BE was assessed through the behavior test and weight-loaded forced swimming test in mice.Then we determined several biochemical parameters related to fatigue to explore possible reasons.Results indicate that BE could significantly enhance exercise performance in mice,and there was a significant improvement in both grip-strength and the time on rota-rods.Meanwhile,BE showed significant anti-fatigue effects by decreasing the blood lactic acid(BLA),blood urea nitrogen(BUN),and creatine kinase(CK)levels and increasing the lactate dehydrogenase(LDH)and malondialdehyde(MDA)levels.Increases in superoxide dismutase(SOD)and glutathione peroxidase(GSH-Px)were observed and reactive oxygen species(ROS)levels was regulated.Liver and muscle glycogen levels and adenosine triphosphate(ATP)levels were also significantly increased.Pearson correlation analysis indicates that fatigue-related indexes including metabolites and energy-related indexes were significantly correlated with antioxidant levels.In conclusion,BE possesses remarkable anti-fatigue activity,thereby shows great potential for improving exercise performance and alleviating physical fatigue and can be considered as a functional food supplement for further development.

A Genetic Linkage Map of Brassica campestris L.ssp. pekinensis (syn. B. rapa L. ssp. pekinensis)

A molecular genetic map of Chinese cabbage was constructed with a 102 recombinant inbred (RI) population from a cross of two cultivated Chinese cabbage lines 177 and 276, using AFLP and RAPD markers. 352 markers including 265 AFLP markers and 87 RAPD markers were integrated into 17 linkage groups. It covered a total of 2 665. 7 cM with an average interval of 7. 6 cM. AFLP marker is efficient for map construction while it easily forms clusters to cause big gaps in map. A total of 13.92 % abnormal segregation markers distributed in the map. The molecular genetic map is fundamental for gene localization, comparative genomics, and QTL mapping of important agronomic traits.

Effects of Fermented Nori (<i>Pyropia yezoensis</i>) Liquid Fertilizer on Plant Growth Characteristics and Nutrient Content of Komatsuna (<i>Brassica rapa</i>L. var. Wakana Komatsuna) Cultivated in Vermiculite

We conducted plant growth experiments in microbe-free vermiculite to study the effects of four types of fermented seaweed liquid fertilizer (SLF) made from nori (Pyropia yezoensis) seaweed on the germination, plant growth characteristics, SPAD value, and nutrient content and uptake of komatsuna (Brassica rapa L. var. wakana komatsuna). The four types of fermented nori SLF used in this study were prepared by anaerobic fermentation of unwashed nori (SLF1), aerobic fermentation of unwashed nori (SLF2), anaerobic fermentation of washed nori (SLF3), and aerobic fermentation of washed nori (SLF4). Komatsuna seeds treated with 200-, 300-, and 400-fold dilutions of SLFs exhibited improved relative germination ratios (RGRs) at 3 and 4 days after sowing (DAS). At 4 DAS, the RGRs of seeds treated with 10-, 100-, 200-, 300-, and 400-fold SLF dilutions showed no differential effect. Seeds treated with undiluted SLFs did not germinate by 4 DAS. SLF1 may promote komatsuna seed germination. The nitrogen (N), calcium, magnesium, sodium (Na), and iodine (I) contents of plants treated with SLF1 were significantly increased relative to plants treated with the other SLFs. Moreover, the I and Na contents of plants were significantly increased by foliar spray application of different dilutions of SLF1. However, SLF treatment markedly reduced the shoot dry weight compared with 1/2-strength modified Hoagland nutrient (MHN) solution, although the same amounts of N and K were applied. SPAD values of the plants treated with SLFs were significantly higher than those of plants treated with MHN. Foliar treatment with SLFs had no significant effect on plant growth, SPAD value, or uptake of nutrients (except Na) relative to the control, but the I content was increased. Plants treated with SLF1 and SLF2 exhibited the highest Na uptake. Foliar spray treatments with SLF1 resulted in the highest I contents in plants. Based on our results, SLF1 is suitable for use as a liquid fertilizer to promote germination and increase nutrient content in komatsuna. These results need to be followed up in soil experiments in the presence of microbes in the rhizosphere.

Variation and Correlation of Erucic Acid,Oleic Acid and Glucosinolate Contents in Brassica rapa Seeds

In order to screen and identify excellent breeding resources and provide basic materials for Brassica rapa breeding,the contents of erucic acid,oleic acid and glucosinolate in 84 kinds of B. rapa were determined by near-infrared spectroscopy,and the correlations among them were also analyzed. The results showed that the content of erucic acid and oleic acid were significantly negatively correlated,the contents of erucic acid and glucosinolate were significantly positively correlated,while the contents of oleic acid and glucosinolate were significantly negatively correlated; principal component analysis( PCA) were performed on the population materials,factors 1 and 2 were extracted for plotting,factor 1 and factor 2 could explain 73. 7% and 23. 2% of the phenotypic variation,respectively; through cluster analysis,79 materials aggregated to form group I,and five special variants deviated from the population. The variation of erucic acid,oleic acid and glucosinolates in B. rapa populations was rich and there was significant correlation. Through cluster analysis,five excellent B. rapa breeding materials( No. 32,No. 45,No. 46,No. 50,and No. 59) were screened.

Differential Expression Analysis of Genie Male Sterility A/B Lines in Chinese Cabbage-Pak-Choi (Brassica campestris ssp. chinensis Makino)

To determine differential expression of genie male sterility A/B lines in Chinese cabbage-pak-choi (Brassica campestris ssp. chinensis Makino var. communis Tsen et Lee), we used the RNA fingerprinting technique, cDNA-AFLP analysis, in different developmental stages and different tissues. While no obvious differential expressions were observed in rosette leaves, florescence leaves, and scapes, some differential expressions were found in alabstrums of A/B lines and among leaves, scapes and alabstrums. We analyzed the al-abstrums collected in different developmental stages with 10 primer combinations. We got a unique band between middle size alabstrums and large alabstrums in B line in one of the ten pair primers, and in another one pair, one band reflecting a higher gene-expression level in A line than that in B line was obtained. No unique bands were found with the other primer combinations. The bands reflecting different gene-expression level were confirmed by Northern hybridization. The results indicated that cDNA-AFLP was a suitable tool for studying differential expression of genie male sterility in plants. SDS-polyacrylamide gel electrophoresis patterns of soluble proteins further verified the difference in A/B lines.

Dissecting the genetic architecture of glucosinolate compounds for quality improvement in flowering stalk tissues of Brassica napus

Glucosinolates(GSLs) and their hydrolytic products contribute to the quality traits of rapeseed flowering stalk tissues, such as taste, flavor and anticarcinogenic properties(Glucoraphanin). However, little is known about the genetic mechanisms of GSL accumulation in rapeseed flowering stalks. In this study, the variation and genetic architecture of GSL metabolites in flowering stalk tissues were investigated for the first time among a panel of 107 accessions. All GSL compounds exhibited continuous and wide variations in the present population. Progoitrin,glucobrassicanapin and gluconapin were the most abundant GSL compounds. Five quantitative trait loci(QTL) significantly associated with three GSL compounds were identified by genome-wide association study. GRA_C04 was under selected during modern breeding, in which the ratio of lower GSL haplotype(HAP2) in the accessions bred before 1990(52.56%) was significantly lower than that after 1990(78.95%). Four candidate genes, BnaA01. SOT16, BnaA06. SOT17, Bna A06. MYB51a, and Bna A06. MYB51b, were identified in the GTL_A01 and 4OH_A06 regions.These findings provide new insights into GSL biosynthesis in flowering stalk tissues and facilitate quality improvement in rapeseed flowering stalks.

Inheritance of Erucic Acid,Glucosinolate,and Oleic Acid Contents in Rapeseed (Brassica napus L.)

This study was conducted to verify the inheritance of certain characters of rapeseed including erucic acid, glucosinolate and oleic acid contents by using generation mean analysis. The cross of lines Ⅲ174×Zi20 （F1）, F2, BC1 （F1×P1）, BC2 （F1×P2）, and parents （P1 and P2） were evaluated in the field. Data were measured on individual plants for oleic acid, erucic acid, and glucosinolate contents. Transgressive variations in F2 population were observed for oleic acid content, indicating that dominance and recessive genes distributed in both parents. Scaling test indicated that the effects of genes controlling these characters did not follow the additivedominance model. The data for three characters were analyzed using six parameter models and found that one or more types of epistatic gene effects were important for glucosinolate content. High broad sense heritabilities were obtained for erucic acid, oleic acid, and glucosinolate contents with the values of 98.97%, 93.68%, and 86.17%, respectively. Two major gene pairs were found to control the expression of erucic acid and oleic acid contents, while three major gene pairs were detected to control glucosinolate content.

甘蓝型油菜种子硫代葡萄糖苷含量的QTL定位及候选基因分析

【目的】解析甘蓝型油菜种子硫代葡萄糖苷性状的重要遗传位点及候选基因,为甘蓝型油菜硫苷基因克隆和品种品质改良奠定基础。【方法】以甘蓝型油菜KN DH群体种子为材料,对在4个种植环境的种子硫苷含量进行QTL定位和候选基因分析。【结果】(1)甘蓝型油菜种子硫苷含量变异系数较高且较为稳定,服从数量性状的遗传特点。(2)7个一致性QTL(cqGC.A9-5、cqGC.A9-7、cqGC.A9-9、cqGC.C2-9、cqGC.C2-10、cqGC.C9-5和cqGC.C9-6)为环境稳定表达QTL,包括3个主效QTL(cqGC.A9-5、cqGC.C2-10和cqGC.C9-5)。(3)在主效QTL cqGC.A9-5和cqGC.C9-5鉴定到3个候选基因(BnaA09g05480D、BnaC09g05620D和BnaC09g05810D),主要涉及硫苷生物合成途径中吲哚-3-乙醛肟、3-烷基-苹果酸的合成及硫苷的转运与分配。【结论】甘蓝型油菜种子硫苷含量为数量性状。3个甘蓝型油菜硫苷含量主效QTL被鉴定到,其置信区间候选基因的拟南芥同源基因参与硫苷合成途径中间产物合成及促进硫苷的转运与分配。

Diversity and association analysis of important agricultural trait based on miniature inverted-repeat transposable element specific marker in Brassica napus L.

Miniature inverted-repeat transposable elements(MITEs)are a group of DNA transposable element(TE)which preferentially distributed with gene associated regions.Tens of MITEs families have been revealed in Brassica napus genome,they scatter across the genome with tens of thousands copies and produce polymorphisms both intra-and inter-species.Our previous studies revealed a Tourist-like MITE,Monkey King,associated with vernalization requirement of B.napus,however there are still few studies reveal MITE association with agricultural traits in B.napus.In the present study,80 polymorphic markers were developed from 55 MITEs,and used to evaluate genetic diversity in a panel of B.napus accessions consisting of 101 natural and 25 synthetic genotypes.Five agricultural traits,oil content,glucosinolate content,erucic acid content,weight of thousand seeds(WTS)and plant height,were investigated across 3-years field experiments,in addition,two traits,hypocotyl length and root length,were evaluated at the 4-leaf stage in the laboratory.Correlations between the MITE-based markers and seven traits were analyzed,finally,10 polymorphic markers produced by 6 pairs of MITE specific primers were revealed relatively high correlation with 5 traits.Two polymorphic markers were anchored with two candidate genes,BnaA02g13530D and BnaA08g20010D,respectively,which may contribute to glucosinolate content and WTS.This research may contribute to genetic improvement through utilization of MITE-induced polymorphisms in Brassica species.

利用InDel标记鉴定典湖1号杂交种纯度

典湖1号是宁波微萌种业有限公司育成的青梗菜新品种,但种子纯度鉴定速度限制了该品种的推广。为实现对该品种杂交种纯度的高通量快速鉴定,在典湖1号父母本(父本EPG-194,母本EPG-168)基因组重测序的基础上开发用于纯度检测的InDel标记。试验以典湖1号及其父母本DNA样品为材料筛选到亲本带型互补、扩增条带清晰和分离速度快的引物D1-7,并用该引物检测田间典湖1号F_(1)群体(EpG-194×EpG-168群体400株,EpG-168×EpG-194群体400株)。试验中,引物D1-7的分子检测结果显示,EpG-194×EpG-168群体和EpG-168×EpG-194群体分别存在非F_(1)杂株146和32株,田间表型鉴定发现EpG-194×EpG-168群体和EpG-168×EpG-194群体分别存在非F_(1)杂株146和32株,对比后二者鉴定的800株单株结果完全一致。结果表明,InDel分子标记引物D1-7准确鉴定了典湖1号群体中混杂的母本自交种,为之后典湖1号杂交种纯度的快速鉴定奠定了基础。

基于顶空气相-离子迁移色谱的不同品种芜菁挥发性成分分析

为探究不同品种芜菁中风味物质的差异,选择不同品种(紫色、黄色、白色)芜菁进行挥发性化合物的鉴定和分析。采用顶空气相-离子迁移色谱法检测样品中挥发性化合物,并建立芜菁挥发性化合物指纹图谱。在芜菁样品中,共检测到109种挥发性化合物,鉴定出80种,包括24种醛类(12%~20%)、15种酯类(23%~27%)、13种醇类(10%~16%)、9种酮类(5%~10%)、3种酸类(3%~7%)、5种烯烃类(约1%)、4种硫醚类(2%~7%)、7种其他类(7%~15%),未被定性化合物(17%~18%)。在芜菁挥发性化合物中酯类含量最高,其次是醛类和醇类。不同品种芜菁的挥发性化合物组成和含量存在明显差异,紫色芜菁中挥发性化合物种类最少,白色芜菁中最多。主成分分析和欧氏距离结果表明,3种芜菁的特征挥发性化合物存在明显差异,紫色芜菁的特征挥发性化合物为辛醛、乙酸、壬醛和(E,E)-2,4-庚二烯醛,白色芜菁为莰烯、2-甲基丁酸乙酯-D、乙偶姻-M和(E)-2-己烯-1-醇,黄色芜菁为5-甲基-2-噻吩甲醛、异戊酸丁酯-M、二丙酮醇-M、丁酮和2,3戊二酮-D。结合正交偏最小二乘判别分析建立模型并筛选出32种变量投影重要度大于1的差异挥发性化合物,作为区分不同品种芜菁的差异挥发性化合物。

白菜抽薹性状相关基因的cDNA-AFLP分析

先期抽薹严重制约着我国春大白菜及高原或高海拔地区的春夏白菜栽培,给生产造成重大损失,因而研究白菜作物低温春化途径抽薹和开花的相关基因对白菜育种具有重要意义。文章选取极早抽薹株系DH-54和极晚抽薹株系DH-43为材料,利用256对引物组合进行cDNA-AFLP分析,筛选到与抽薹开花相关的差异表达的转录衍生片段(Transcript-derived fragment,TDF)191条,对其中82个TDF进行克隆测序。结果表明:52个TDF与NCBI或TIGR已有序列同源,功能涉及代谢、胁迫及逆境应答、信号转导、转录调控等等;22个TDF在NCBI或TIGR找到同源序列,但功能未知;有8个TDF在NCBI或TIGR找不到同源序列,可能是一些新基因。

NaCl和Na2SO4胁迫对白菜型冬油菜种子萌发的影响及其耐盐性分析

以6个耐盐性不同的白菜型冬油菜种子为材料,将NaCl和Na_2SO_4按摩尔比1:1混合,设浓度为0(CK)、45、90、135、180、240 mmol·L^(-1)6个处理,测定其对种子萌发和生长参数的影响,研究不同冬油菜种子萌发时的耐盐能力,以期为耐盐冬油菜的筛选提供依据。结果表明:(1)45 mmol·L^(-1)和90 mmol·L^(-1)盐浓度对种子萌发的影响不明显;135 mmol·L^(-1)和180 mmol·L^(-1)盐浓度明显抑制了种子萌发,表现为种子发芽势、发芽率、发芽指数、活力指数、胚根长、胚芽长、鲜重和干重均随盐浓度的增大而明显降低。因此,135~180 mmol·L^(-1)盐浓度可认为是耐盐性鉴定的适宜范围。(2)不同指标对盐胁迫的敏感程度差异较大,发芽指数、活力指数、胚芽长和鲜重与盐浓度均为极显著负相关,对盐胁迫最为敏感。(3)3个耐盐冬油菜ky-1、ky-10-191和ky-NDJ的种子发芽指数、活力指数、胚芽长和鲜重的耐盐临界值显著高于原有品系平油1号、10-191和ky-NDJ。ky-1、ky-10-191、ky-NDJ的耐盐临界值分别为133.895、123.264、107.399 mmol·L^(-1),而平油1号、10-191、NDJ的耐盐临界值分别为117.394、103.947、93.834 mmol·L^(-1)。用隶属函数法综合评价,耐盐性强弱顺序依次为ky-1>ky-10-191>平油1号>kyNDJ>10-191>NDJ。可见,ky-1、ky-10-191和ky-NDJ的耐盐性较平油1号、10-191和NDJ均有所提高。

北方地区白菜型冬油菜与春油菜的SSR和InDel遗传多样性分析

为了合理评价北方地区白菜型油菜种质资源,为抗寒育种及组合配制提供依据,从252对标记中筛选出9对SSR和36对InDel标记对感温性、抗寒性、品质等性状差异明显的19份白菜型油菜品种的遗传多样性和亲缘关系进行了分析.结果表明,共检测到95个等位变异,平均每个标记2.15个;有效等位基因变幅为1.05～3.27个,平均为1.70个.Shannon指数的变幅范围在0.1217～1.2695间,平均值为0.5803;多态性信息量PIC变幅范围为0.0499～0.6377,平均值为0.3081.通过NTSYS计算遗传相似系数GS并按加权配对法（UPGMA）聚类,结果表明19份材料的GS变异在0.52～0.86之间.在GS为0.605水平上可将19份材料按两室与多室性划分为I-1和I-2两大类群,I-1类群在GS为0.655水平上可按冬春性分为II-1、II-2两个亚类群.在GS为0.71水平上,可将冬性材料划分为4个小群.聚类结果表明北方地区白菜型油菜的遗传多样性丰富,冬、春性品种间及春性品种间亲缘关系较远,存在较大遗传差异.

利用DH群体进行白菜株高和开展度的QTL定位分析

应用AFLP、SRAP、RAPD、SSR及同工酶等标记构建的326个标记位点的白菜遗传图谱和81个DH株系群体,采用M apQTL 5软件对白菜的株高和开展度进行QTL定位。结果表明：通过2年试验,在10个连锁群上共检测到27个QTL,主要分布在R 5、R 10连锁群上：其中控制株高的有11个,控制开展度的有16个;获得2年稳定表达的控制株高的QTL 1个,控制开展度的QTL 3个;各QTL加性效应各不相等,其遗传贡献率为13.3%-29.2%;控制株高和控制开展度的QTL位点表现为紧密连锁或相似的位置,主要集中在R 5连锁群上。

铜胁迫下小白菜叶片基因表达谱的cDNA-AFLP分析

本研究以小白菜品种‘上海青’为试验材料，利用Cu2＋质量浓度为10mg·L-1的营养液水培小白菜幼苗，通过cDNA—AFLP技术分析小白菜响应铜胁迫相关基因及其表达情况。试验中利用多态性较好的135对引物进行扩增，共获得5800多条转录衍生片段（TDFs），平均每个5J物组合扩增出30～60条，片段大小主要集中在100～1000bp，根据条带强弱和有无的变化，其表达模式可以分为持续表达、瞬时表达、上调表达和下调表达4种情况。通过筛选获得180条差异表达TDFs，其中上调表达77条（42．8％），下调表达61条（33．9％），瞬时表达42条（23.3％）。选取其中152条差异表达TDFs进行回收测序，最终得到151个有效序列，其中上调表达68条（45％1，下调表达50条（33．1％），瞬时表达33条（21．9％）。Blastx比对结果显示，112条TDFs序列与已知基因具有较高的相似度，涉及能量代谢、物质合成与运输、逆境响应、信号转导等多种途径，16条TDFs序列与功能未知或假定基因的同源性较高，其余23条TDFs序列与已知功能基因的同源性较低或零匹配，可能是一些新的铜胁迫应答基因。从151条TDFs选取4条TDFs，以小白菜actin基因为内参照，对其在不同胁迫处理时间的表达情况进行荧光定量RT—PCR验证，分析结果与cDNA．AFLP结果基本吻合，表明cDNA—AFLP技术是研究小白菜铜胁迫相关基因差异表达的有效方法。小白菜铜胁迫相关基因表达情况较为复杂，涉及多种代谢途径。本研究结果可为探讨小白菜铜胁迫的分子机理和相关基因的克隆提供理论依据。

白菜型油菜春化基因BrFLC序列变异分析

为寻找与冬春性相关的变异,以开发冬春性品种分子辅助标记,采用巢式和半巢式扩增法,对感温性和抗寒性强弱不同的5个白菜型油菜品种的Br FLC基因的第4外显子至第7外显子进行了特异性扩增。除Br FLC5无扩增结果外,其余3个基因均得到扩增。序列比对结果发现,3个Br FLC在第4外显子至第7外显子均存在有不同程度的等位变异,发生的主要等位变异有SNP和Indel两种类型。Br FLC1变异与冬春性相关性不大,与冬春性关系密切的变异主要发生在Br FLC2和Br FLC3上。Br FLC2中检测到1个Indel类型和5个SNP类型变异位点与冬春性有关。Br FLC3中检测到1个Indel类型和16个SNP类型变异位点与冬春性有关。

北方旱寒区冬油菜抗寒性相关指标的QTL定位

以抗寒性不同的白菜型冬油菜品种陇油7号与陇油9号为亲本构建的F2群体为材料,对白菜型冬油菜抗寒性相关的生理指标进行了QTL定位分析。在白菜型油菜的10条染色体上定位了SOD活性、POD活性、CAT活性、MDA含量、游离脯氨酸含量和可溶性蛋白含量共6个性状的24个QTL位点,可解释表型变异为11.1783%~81.1753%;10个显性效应表现为显性正效应,LOD值在3.2787~163.7958之间。染色体2A的Br ID90127-Br ID10421区、Br ID10421-Br ID10709区及Br ID10709-Br ID101165区,5A的BRMS034(R5)-Ra3-H10区、6A的Ra1-F06-Ra2-D04区、8A的Br ID10839-Ra2-E12区和10A的Br ID90115-Ra2-E07区是多个性状QTL共享的标记区间。研究结果对冬油菜抗寒性基因精确定位具有一定价值。