利用常规研究方法,对甜菜单体附加系M 14品系(B eta vu lg aris L.,VV+1C、2n=18+1)的生殖方式进行细胞学与胚胎学研究.结果表明:(1)甜菜单体附加系M 14的4代细胞学检查表明:染色体组分别为VV+1C、2n=18+1;VV+0、2n=18+0;VV+2C、2n=18+2...利用常规研究方法,对甜菜单体附加系M 14品系(B eta vu lg aris L.,VV+1C、2n=18+1)的生殖方式进行细胞学与胚胎学研究.结果表明:(1)甜菜单体附加系M 14的4代细胞学检查表明:染色体组分别为VV+1C、2n=18+1;VV+0、2n=18+0;VV+2C、2n=18+2;VVV+0、2n=27+0;VVV+1C、2n=27+1;VVV+2C、2n=27+2等,其中VV+1C、2n=18+1的植株传递率平均为96.7%,表现为稳定传递,具有二倍体孢子无融合生殖特性;其余各种分离植株的传递率总计为3.25%,有性生殖发生率较低.(2)胚胎学研究表明,二倍体孢子无融合生殖的胚珠中,珠孔处看不到花粉管,胚囊没有发生受精作用.2个助细胞提前退化,半数卵细胞的极性与正常卵细胞相反;卵与次生核不经受精而自发分裂,卵细胞自发分裂产生无性胚,次生核自发分裂产生核型胚乳,而且次生核自发分裂早于卵细胞分裂;有性生殖胚珠中,珠孔处可见多条花粉管,胚囊里见到精卵融合的图像.表明甜菜单体附加系M 14是以二倍体孢子无融合生殖为主要繁殖方式,有性生殖为次要敏殖方式的兼性无融合生殖体.展开更多
The beet (Beta vulgaris L.) vegetable is of great importance in the Brazilian market, mainly by having high nutritional values in consumer diet. Thus, the objective of this work was to evaluate the effects of organic ...The beet (Beta vulgaris L.) vegetable is of great importance in the Brazilian market, mainly by having high nutritional values in consumer diet. Thus, the objective of this work was to evaluate the effects of organic and mineral fertilization on the production and post-harvest quality of beet. The experiment was conducted in the field, in the municipality of Urutaí-GO. The experimental design was a randomized block (DCB), where treatments were applied to two types of fertilizer: organic (chicken manure) and conventional (mineral fertilizer) with six replicates (using six tubers per plot). The following evaluations were made: horizontal and vertical diameters of the tubers (cm) weight (kg) Protein (g) Lipid (%) Ash humidity (%), electrical conductivity (μS·cm-1), pH, Titratable Acidity and Brix. The organic surpassed conventional treatment for all variables, except for the ash content, wherein the organic treating poultry litter base, showed 1.40% of ash and pH (6.48).展开更多
文摘利用常规研究方法,对甜菜单体附加系M 14品系(B eta vu lg aris L.,VV+1C、2n=18+1)的生殖方式进行细胞学与胚胎学研究.结果表明:(1)甜菜单体附加系M 14的4代细胞学检查表明:染色体组分别为VV+1C、2n=18+1;VV+0、2n=18+0;VV+2C、2n=18+2;VVV+0、2n=27+0;VVV+1C、2n=27+1;VVV+2C、2n=27+2等,其中VV+1C、2n=18+1的植株传递率平均为96.7%,表现为稳定传递,具有二倍体孢子无融合生殖特性;其余各种分离植株的传递率总计为3.25%,有性生殖发生率较低.(2)胚胎学研究表明,二倍体孢子无融合生殖的胚珠中,珠孔处看不到花粉管,胚囊没有发生受精作用.2个助细胞提前退化,半数卵细胞的极性与正常卵细胞相反;卵与次生核不经受精而自发分裂,卵细胞自发分裂产生无性胚,次生核自发分裂产生核型胚乳,而且次生核自发分裂早于卵细胞分裂;有性生殖胚珠中,珠孔处可见多条花粉管,胚囊里见到精卵融合的图像.表明甜菜单体附加系M 14是以二倍体孢子无融合生殖为主要繁殖方式,有性生殖为次要敏殖方式的兼性无融合生殖体.
文摘The beet (Beta vulgaris L.) vegetable is of great importance in the Brazilian market, mainly by having high nutritional values in consumer diet. Thus, the objective of this work was to evaluate the effects of organic and mineral fertilization on the production and post-harvest quality of beet. The experiment was conducted in the field, in the municipality of Urutaí-GO. The experimental design was a randomized block (DCB), where treatments were applied to two types of fertilizer: organic (chicken manure) and conventional (mineral fertilizer) with six replicates (using six tubers per plot). The following evaluations were made: horizontal and vertical diameters of the tubers (cm) weight (kg) Protein (g) Lipid (%) Ash humidity (%), electrical conductivity (μS·cm-1), pH, Titratable Acidity and Brix. The organic surpassed conventional treatment for all variables, except for the ash content, wherein the organic treating poultry litter base, showed 1.40% of ash and pH (6.48).
