The clonal diversity of Clintonia udensis Trautv.et Mey.was detected by ISSR markers among 16 populations,and its correlation with ecological factors was analyzed as well in this work.Results showed that individuals(c...The clonal diversity of Clintonia udensis Trautv.et Mey.was detected by ISSR markers among 16 populations,and its correlation with ecological factors was analyzed as well in this work.Results showed that individuals(clonal ramets)per genotype were 1.12 and 1.149 at population and species levels,respectively,and that the 16 populations were all multiclonal.The detected genotypes were localized,without exception,within populations but demonstrated relatively high clonal differentiation among populations.The clonal diversity of the studied populations was high,with the average Simpson's index of 0.975,while the genets showed a clonal architecture of"guerilla".The population genetic diversities revealed by genet were consistent with those by ramet,further confirming their genetic differentiation among populations.And its genotype diversity within populations probably resulted largely from the frequent seedling regeneration and self-compatibility.In addition,the correlation analysis further revealed that,among the ecological factors,Simpson's index of C.udensis had a significant positive correlation(P<0.05)with pH values in the soil but not others.展开更多
七筋姑(Clintonia udensis Trautv. et Mey)具倒生胚珠、双珠被、薄珠心、单个孢原。大孢子母细胞减数分裂后形成1+3排列,合点端三核退化,珠孔端有功能的大孢子核进行两次有丝分裂。成熟胚囊具5核或6核,即1组卵器、1上极核、合点端的1个...七筋姑(Clintonia udensis Trautv. et Mey)具倒生胚珠、双珠被、薄珠心、单个孢原。大孢子母细胞减数分裂后形成1+3排列,合点端三核退化,珠孔端有功能的大孢子核进行两次有丝分裂。成熟胚囊具5核或6核,即1组卵器、1上极核、合点端的1个或2个退化核。胚囊发育为四孢子、高度退化的贝母型。花药壁由表皮、药室内壁、两层中间层及绒毡层组成,发育属单子叶型。绒毡层解体方式为分泌型。小孢子母细胞减数分裂时胞质分裂为连续型。二轴对称式四分体,2-细胞成熟花粉粒。组织化学表明:大小孢子发生及雌雄配子体形成过程中的不溶性多糖颗粒的分布呈现规律性变化。展开更多
基金the National Natural Science Foundation of China(Grant No.30670129)Doctoral Fund of the Ministry of Education of China(Grant No.20040697010)Natural Science Foundation of Shaanxi Province(Grant No.2005C117)
文摘The clonal diversity of Clintonia udensis Trautv.et Mey.was detected by ISSR markers among 16 populations,and its correlation with ecological factors was analyzed as well in this work.Results showed that individuals(clonal ramets)per genotype were 1.12 and 1.149 at population and species levels,respectively,and that the 16 populations were all multiclonal.The detected genotypes were localized,without exception,within populations but demonstrated relatively high clonal differentiation among populations.The clonal diversity of the studied populations was high,with the average Simpson's index of 0.975,while the genets showed a clonal architecture of"guerilla".The population genetic diversities revealed by genet were consistent with those by ramet,further confirming their genetic differentiation among populations.And its genotype diversity within populations probably resulted largely from the frequent seedling regeneration and self-compatibility.In addition,the correlation analysis further revealed that,among the ecological factors,Simpson's index of C.udensis had a significant positive correlation(P<0.05)with pH values in the soil but not others.
文摘七筋姑(Clintonia udensis Trautv. et Mey)具倒生胚珠、双珠被、薄珠心、单个孢原。大孢子母细胞减数分裂后形成1+3排列,合点端三核退化,珠孔端有功能的大孢子核进行两次有丝分裂。成熟胚囊具5核或6核,即1组卵器、1上极核、合点端的1个或2个退化核。胚囊发育为四孢子、高度退化的贝母型。花药壁由表皮、药室内壁、两层中间层及绒毡层组成,发育属单子叶型。绒毡层解体方式为分泌型。小孢子母细胞减数分裂时胞质分裂为连续型。二轴对称式四分体,2-细胞成熟花粉粒。组织化学表明:大小孢子发生及雌雄配子体形成过程中的不溶性多糖颗粒的分布呈现规律性变化。
