Plant height in cucumber is not only an important trait for breeding,but also one of the model traits suitable for the study of developmental biology.Amplified fragment length polymorphism(AFLP)and simple sequence rep...Plant height in cucumber is not only an important trait for breeding,but also one of the model traits suitable for the study of developmental biology.Amplified fragment length polymorphism(AFLP)and simple sequence repeat(SSR)markers techniques were applied for the construction of genetic linkage maps in cucumber.To understand the dwarf trait genetic basis in cucumber,the quantitative trait loci(QTL)were identified using F_6 recombinant inbred line populations(RILs)comprising 336 lines from the cross between the two cultivars D0462(the dwarf)and DN129(the vine).In total,six SSR markers and 15 AFLP markers were detected on the five linkage groups covering 152.8 cM with a mean marker interval of 7.28 cM.Only one QTL was found to be linked with plant height and the dwarf trait locus remained in the fourth linkage group.The contributory percentage of the single QTL to plant height was 11.39%.展开更多
为使偏分离群体连锁图矫正方法能被广泛应用,在Microsoft Visual Studio 2010操作平台下,利用C++语言研制了Windows界面友好的DistortedMap软件包。结果显示:DistortedMap软件包具有遗传群体模拟、偏分离群体连锁图矫正和数量性状基因...为使偏分离群体连锁图矫正方法能被广泛应用,在Microsoft Visual Studio 2010操作平台下,利用C++语言研制了Windows界面友好的DistortedMap软件包。结果显示:DistortedMap软件包具有遗传群体模拟、偏分离群体连锁图矫正和数量性状基因座定位的功能。使用该软件包可获得偏分离标记间遗传距离的无偏估计值并消除标记偏分离对QTL定位的影响。展开更多
盐胁迫是许多沿海地区水稻生产的主要制约因素,尤其是沿海地区的咸淡水交汇区域。耐盐性是一种复杂的性状,可以通过QTL定位来帮助耐盐育种,以培育更高耐盐性的水稻品种。本研究供体亲本为沿海深水稻品种赤禾,受体亲本为美国水稻品种Lemo...盐胁迫是许多沿海地区水稻生产的主要制约因素,尤其是沿海地区的咸淡水交汇区域。耐盐性是一种复杂的性状,可以通过QTL定位来帮助耐盐育种,以培育更高耐盐性的水稻品种。本研究供体亲本为沿海深水稻品种赤禾,受体亲本为美国水稻品种Lemont,杂交获得174份F9代的重组自交系,在芽期、苗期和生殖生长期分别利用浓度为15 g L^(-1)、5 g L^(-1)和5~6 g L^(-1)的NaCl进行胁迫,通过芽期相对发芽率、苗期耐盐性评级和生殖生长期的7个表型性状为基础数据,利用142个SSR分子标记绘制连锁遗传图并进行QTL分析。鉴定结果发现,赤禾在芽期表现敏盐,在苗期和生殖生长期表现耐盐;Lemont相反。3个生长时期分别有70.11%、50.57%和60.34%的品系表现为弱耐盐性,而且耐盐性为弱的负相关。本研究共鉴定出33个LOD值为2.52~10.32的QTL,解释0.06%~13.68%的表型遗传变异,解释最大遗传变异的QTL均由耐盐亲本贡献,其中芽期4个、苗期6个和生殖生长期23个位点,并在生殖生长期发现4个QTL重叠区域。这些QTL可以进一步研究,不仅为提高水稻育种的耐盐性提供了新的遗传资源,还有助于在水稻耐盐育种中,提高水稻品种的耐盐性。展开更多
基金Supported by the"Academic Backbone"Project of Northeast Agricultural University(18XG06)Supporting Certificate of Heilongjiang Postdoctoral Scientific Research Developmental Fund(LBH-Q16021)the Natural Science Foundation of Heilongjiang Province,China(LH2019C033)。
文摘Plant height in cucumber is not only an important trait for breeding,but also one of the model traits suitable for the study of developmental biology.Amplified fragment length polymorphism(AFLP)and simple sequence repeat(SSR)markers techniques were applied for the construction of genetic linkage maps in cucumber.To understand the dwarf trait genetic basis in cucumber,the quantitative trait loci(QTL)were identified using F_6 recombinant inbred line populations(RILs)comprising 336 lines from the cross between the two cultivars D0462(the dwarf)and DN129(the vine).In total,six SSR markers and 15 AFLP markers were detected on the five linkage groups covering 152.8 cM with a mean marker interval of 7.28 cM.Only one QTL was found to be linked with plant height and the dwarf trait locus remained in the fourth linkage group.The contributory percentage of the single QTL to plant height was 11.39%.
文摘为使偏分离群体连锁图矫正方法能被广泛应用,在Microsoft Visual Studio 2010操作平台下,利用C++语言研制了Windows界面友好的DistortedMap软件包。结果显示:DistortedMap软件包具有遗传群体模拟、偏分离群体连锁图矫正和数量性状基因座定位的功能。使用该软件包可获得偏分离标记间遗传距离的无偏估计值并消除标记偏分离对QTL定位的影响。
文摘盐胁迫是许多沿海地区水稻生产的主要制约因素,尤其是沿海地区的咸淡水交汇区域。耐盐性是一种复杂的性状,可以通过QTL定位来帮助耐盐育种,以培育更高耐盐性的水稻品种。本研究供体亲本为沿海深水稻品种赤禾,受体亲本为美国水稻品种Lemont,杂交获得174份F9代的重组自交系,在芽期、苗期和生殖生长期分别利用浓度为15 g L^(-1)、5 g L^(-1)和5~6 g L^(-1)的NaCl进行胁迫,通过芽期相对发芽率、苗期耐盐性评级和生殖生长期的7个表型性状为基础数据,利用142个SSR分子标记绘制连锁遗传图并进行QTL分析。鉴定结果发现,赤禾在芽期表现敏盐,在苗期和生殖生长期表现耐盐;Lemont相反。3个生长时期分别有70.11%、50.57%和60.34%的品系表现为弱耐盐性,而且耐盐性为弱的负相关。本研究共鉴定出33个LOD值为2.52~10.32的QTL,解释0.06%~13.68%的表型遗传变异,解释最大遗传变异的QTL均由耐盐亲本贡献,其中芽期4个、苗期6个和生殖生长期23个位点,并在生殖生长期发现4个QTL重叠区域。这些QTL可以进一步研究,不仅为提高水稻育种的耐盐性提供了新的遗传资源,还有助于在水稻耐盐育种中,提高水稻品种的耐盐性。
