Alam M N, Nath Ujjal Kumar, Karim K M R, Ahmed M M, Mitul R Y
Bangladesh Sugarcrop Research Institute, Regional Station, Gazipur 1701, Bangladesh.
Department of Genetics and Plant Breeding, Bangladesh Agricultural University, Mymensingh 2200, Bangladesh.
Scientifica (Cairo). 2017;2017:5202913. doi: 10.1155/2017/5202913. Epub 2017 Dec 3.
Sugarcane is the main sugar producing crop in Bangladesh. However, improvement of this crop through breeding is limited due to lack of genetic diversity. Therefore, genetic variability and diversity assessment are necessarily important for the foreign introduced materials. Experiment was conducted with 9 exotic sugarcane genotypes at Regional Station, Bangladesh Sugar Crop Research Institute, Gazipur, during 2012-13, following RCBD. Data were collected on different growth and yield contributing characters. Individual cane weight exhibited high genotypic coefficient of variation and phenotypic coefficient of variation. Leaf blade length, leaf blade width, fresh leaf weight, dried leaf weight, number of tillers, millable cane, bud size, cane diameter, internodes number, internode length, plant height, stalk length, brix%, and individual cane weight showed high heritability. Individual cane weight showed highly significant and positive correlation with cane diameter, internode length, and stalk length, whereas path coefficient analysis revealed that cane diameter had maximum positive direct effect on individual cane weight followed by internode length, number of tillers, and chlorophyll content. Results indicate that the genotypes should be selected on the basis of individual cane weight, cane diameter, and millable canes number for future breeding to get higher sugarcane yield in respect to juice and brix content.
甘蔗是孟加拉国主要的制糖作物。然而，由于缺乏遗传多样性，通过育种改良这种作物受到限制。因此，对引进的外来材料进行遗传变异性和多样性评估至关重要。2012 - 2013年期间，在加济布尔的孟加拉国糖料作物研究所区域站，采用随机区组设计对9个外来甘蔗基因型进行了试验。收集了不同生长和产量相关性状的数据。单茎重表现出较高的基因型变异系数和表型变异系数。叶片长度、叶片宽度、鲜叶重、干叶重、分蘖数、可砍收甘蔗数、芽大小、茎直径、节数、节间长度、株高、茎长、锤度%和单茎重在遗传力方面表现较高。单茎重与茎直径、节间长度和茎长呈极显著正相关，而通径系数分析表明，茎直径对单茎重的正向直接效应最大，其次是节间长度、分蘖数和叶绿素含量。结果表明，为了在汁液和锤度含量方面获得更高的甘蔗产量，未来育种应根据单茎重、茎直径和可砍收甘蔗数来选择基因型。
