高产、抗病、适应性广的红麻新品种 “中红麻10号”的选育

中红麻10号（原名“KB2”）系利用国外优良红麻种质“EV41”与国内抗病材料“72-44”有性杂交选育而成的不早花裂叶型红麻新品种。在1993～1994年湖南省区域试验中平均亩产纤维303.85kg比对照湘红麻1号(7804)248.20kg增产22.4%(春播)；在1994-1995年广西区试中比当地适应性强的“系选青皮三号”平均增产13.2%；在1997-1998年全国红麻区试中平均亩产纤维248.58kg，比新对照粤74-3增产15.8%；干茎产量比对照青皮三号平均增产25.4%，其增产幅度均达极显著水平，KB2的平均增产幅度在参试新品种中居首位，韧皮含量和硫酸盐纸浆得率比对照青皮三号提高3.6和1.42个百分点，也高于粤74-3；束纤维品质、单纤维长度和抗炭疽病性亦优于对照品种，抗倒性明显强于对照，表明“KB2”是一个集高产、抗病、抗倒、优质、适应性广于一体的纺织、造纸兼用的红麻优良新品种。

The Breeding of New Kenaf Variety KB2 with High Yield Disease-resistance and Wide Adaptability

Kenaf new variety KB2,green stem,divided leaf,which was bred from progeny of “EV41X72—44”,is the most promising variety among the breeding lines at present.The average fiber yield of KB2 was 303.8kg/666.7m2,22.4%， higher than that of CK“7804”in Hunan Provincial Kenaf regional trial at 5 locations for 2 years,248.6kg/666.7m2,15.8% higher than that of new CK“74-3”in national kenaf regional trial at 8 locations in succesive 2 years(1997-1998),253.9kg/666.7m2,21.2% higher than that of Qingpi 3 in Anhui Province regional trial in 1996-1997.Average dry stalk yield of KB2 was 1.22T/666.7m2,25.4% higher than that of Qingpi 3.Average fiber and stem yields of KB2 ranked the first among the new strains and standard varieties.Its average fiber strength was 43.8kg/g,fineness 276.8m/g.The average length of bark fiber 2.74mm,core fiber 0.76mm,ratio of bark to stalk 38.1%,ratio of pulp to dry stalk 48.1% with the method of sulfate cook.All of the traits were better than that of CK.The main abvantages of KB2 were more effective plants at final harvest,no early flowering,large plants,superior fiber quality,high resistance to anthracnose disease and wide adaptability.