苎麻新品种“赣苎4号”的选育

采用系统育种方法从湘苎2号种子繁殖后代选育成功赣苎4号（原代号93-24）新品种，全国区试平均原麻产量2556．6／hm^2，比对照品种湘苎2号增产15．5％；单纤维支数三季平均1825m／g。单纤维强力58．95CN。品系试验平均原麻产量2903.1kg／hm^2，比对照品种湘苎3号增产33．5％：单纤维支数2012m／g，强力29．2CN。生产试验中二、三龄麻平均产量2478kg／hm^2。比对照品种赣苎3号增产13．9％。该品种为中根丛生型。抗风性较强，高抗花叶病、炭疽病和根腐线虫病；生育期中熟偏晚，全年三季工艺成熟天数合计195天左右。该品种于2005年12月通过中国麻类作物品种鉴定委员鉴定井命名。

Breeding of the New Ramie Cultivar Ganzhu 4

Ganzhu 4,a new ramie cultivar bred from the seed progeny of Xiang zh u 2(the original code 93-24),yielded raw fiber 2556.6kg/hm2,15.5%more than that of the control cultivar Xiangzhu 2 in the national regional test,with sing le fiber fineness 1825m/g and fiber intensity 59.95CN in average of three cuttin gs in a year.In the varietal trial,the new cultivar yielded raw fiber 2903.1kg /hm2,33.5%more than that of Xiangzhu 3,with single fiber fineness 2012m/g and fiber intensity 29.2CN.Ganzhu 4 yielded raw fiber 2478kg/hm2 in mean yield of the second and third year in the performance test,13.9%more than that of Ganzh u 3.The new cultivar is middle-rooted and clustered,lodging-resistant,highl y resistant to ramie mosaic,anthracnose and root lesion nematode diseases,show ing a bit late ripening quality and having the whole growth duration about 195 d ays for the three cuttings in a year.This new cultivar was approved in Dec.200 5,by the Chinese Committee of Cultivar Identification for Bast Fiber Crops.