A mating design,including full-sib and half-sib Catalpa bungei was conducted.The germination ability was studied.The temperature,soaking and lighting time and pretreatment that could influence on Catalpa bungei seed g...A mating design,including full-sib and half-sib Catalpa bungei was conducted.The germination ability was studied.The temperature,soaking and lighting time and pretreatment that could influence on Catalpa bungei seed germination were studied.The result showed that the difference of germination rate and energy among different mating combinations was extremely significant.The influence of the individual plant to the germination rate was lower than that of different variety.The germination rate of the combination C.bungei and C.fargesii was always low.The germination rate and energy of two set of reciprocal crosses were very similar.The germination rate was the highest for soaking the seed for 24 hours at a constant temperature of 25 ℃ then germinating it at a changing temperature 20-30 ℃,the difference was remarkable.Another result,an 8-hour-long lighting daily was more advantaged for the germination of the seed than that in a completely dark condition;the germinating rate of the seed stored at a temperature of 5 ℃ for a week after soaking is also much higher than that stored at a low temperature.展开更多
采用ISSR分子标记技术对华仁杏Armeniaca cathayana D.L.Fu et al.3个杂交组合(A:H1×H2,B:H1×X1,C:H1×X2)的亲本及杂交一代(F1)进行了遗传分析。从100条ISSR引物中筛选出稳定多态的8条引物,共得到52个扩增位点,其中44个...采用ISSR分子标记技术对华仁杏Armeniaca cathayana D.L.Fu et al.3个杂交组合(A:H1×H2,B:H1×X1,C:H1×X2)的亲本及杂交一代(F1)进行了遗传分析。从100条ISSR引物中筛选出稳定多态的8条引物,共得到52个扩增位点,其中44个具有多态性,多态性位点百分率达84.62%。在华仁杏3对杂交组合中,组合B的F1子代同母本的遗传相似系数平均为0.6601,高于其亲本间的遗传相似系数0.6078,同父本的遗传相似系数平均为0.5882,低于其亲本间的遗传相似系数。组合A和组合C的F1子代同父本、母本之间的遗传相似系数平均值都低于其各自亲本间的遗传相似系数。同时3个杂交组合F1的有效等位基因数、期望杂合度、shannon多样性指数都高于两亲本间的。这表明华仁杏3个杂交组合的F1子代都产生了明显的的遗传变异,遗传多样性水平得到了提高。展开更多
In order to study the growth traits of Catalpa bungei clones in various growth periods during the nursery stage so as to provide a theoretical basis for genetic improvement,the authors matched the height and diameter ...In order to study the growth traits of Catalpa bungei clones in various growth periods during the nursery stage so as to provide a theoretical basis for genetic improvement,the authors matched the height and diameter in nursery stage by Logistic equation.The results showed that the mean height of clones was 325.19 cm,with the range of 253.48-402.88 cm,the mean basal diameter of clones was 4.29 cm,with the range of 3.61-5.05 cm.The height increment could be divided into two stage,i.e.the early-growing period and the fast-growing period,while the basal diameter increment could be divided into three stage,i.e.the early-growing period,the fast-growing period and the late-growing period.The beginning of fast-growing period,the end of fast-growing period,the duration of fast-growing period,and the daily mean height increment in fast-growing period were May 26-July 2,September 11-October 15,72-128 days,and 1.70-2.88 cm,while that for basal diameter increment were May 9-June 5,August 23-October 3,95-138 days,and 0.021-0.032 cm.The variation of traits in fast-growing period was more significant.The height and basal diameter were significantly correlated to their increments in earlygrowing period(0.744,0.928),fast-growing period(0.965,0.804),and their daily mean increment in fastgrowing period(0.733,0.811).展开更多
文摘A mating design,including full-sib and half-sib Catalpa bungei was conducted.The germination ability was studied.The temperature,soaking and lighting time and pretreatment that could influence on Catalpa bungei seed germination were studied.The result showed that the difference of germination rate and energy among different mating combinations was extremely significant.The influence of the individual plant to the germination rate was lower than that of different variety.The germination rate of the combination C.bungei and C.fargesii was always low.The germination rate and energy of two set of reciprocal crosses were very similar.The germination rate was the highest for soaking the seed for 24 hours at a constant temperature of 25 ℃ then germinating it at a changing temperature 20-30 ℃,the difference was remarkable.Another result,an 8-hour-long lighting daily was more advantaged for the germination of the seed than that in a completely dark condition;the germinating rate of the seed stored at a temperature of 5 ℃ for a week after soaking is also much higher than that stored at a low temperature.
文摘采用ISSR分子标记技术对华仁杏Armeniaca cathayana D.L.Fu et al.3个杂交组合(A:H1×H2,B:H1×X1,C:H1×X2)的亲本及杂交一代(F1)进行了遗传分析。从100条ISSR引物中筛选出稳定多态的8条引物,共得到52个扩增位点,其中44个具有多态性,多态性位点百分率达84.62%。在华仁杏3对杂交组合中,组合B的F1子代同母本的遗传相似系数平均为0.6601,高于其亲本间的遗传相似系数0.6078,同父本的遗传相似系数平均为0.5882,低于其亲本间的遗传相似系数。组合A和组合C的F1子代同父本、母本之间的遗传相似系数平均值都低于其各自亲本间的遗传相似系数。同时3个杂交组合F1的有效等位基因数、期望杂合度、shannon多样性指数都高于两亲本间的。这表明华仁杏3个杂交组合的F1子代都产生了明显的的遗传变异,遗传多样性水平得到了提高。
文摘In order to study the growth traits of Catalpa bungei clones in various growth periods during the nursery stage so as to provide a theoretical basis for genetic improvement,the authors matched the height and diameter in nursery stage by Logistic equation.The results showed that the mean height of clones was 325.19 cm,with the range of 253.48-402.88 cm,the mean basal diameter of clones was 4.29 cm,with the range of 3.61-5.05 cm.The height increment could be divided into two stage,i.e.the early-growing period and the fast-growing period,while the basal diameter increment could be divided into three stage,i.e.the early-growing period,the fast-growing period and the late-growing period.The beginning of fast-growing period,the end of fast-growing period,the duration of fast-growing period,and the daily mean height increment in fast-growing period were May 26-July 2,September 11-October 15,72-128 days,and 1.70-2.88 cm,while that for basal diameter increment were May 9-June 5,August 23-October 3,95-138 days,and 0.021-0.032 cm.The variation of traits in fast-growing period was more significant.The height and basal diameter were significantly correlated to their increments in earlygrowing period(0.744,0.928),fast-growing period(0.965,0.804),and their daily mean increment in fastgrowing period(0.733,0.811).
