摘要
将二倍体航道冰草(Agropyron cristatum cv.Fairway)与蒙古冰草(Agropyron mongolicum)进行种间远缘杂交获得的杂交种F1代种子,利用秋水仙碱诱导染色体加倍,通过选育得到四倍体杂交冰草优良新品系SZB-02,经品比、区域和生产试验,历时13年育成四倍体蒙杂冰草1号新品种。该品种为多年生疏丛型禾本科草本植物,须根系、植株生长整齐、叶长披针形、穗型较宽大。蒙杂冰草1号产量较高,年刈割两次的鲜草总产量平均为25 938.35kg·hm-2,干草产量平均为9 552.33kg·hm-2,种子产量平均为802.37kg·hm-2。其开花期粗蛋白质含量高达16.13%,并富含粗脂肪、无氮浸出物、钙和磷等营养成分,营养价值高;草质柔软、叶量大、适口性好,可青饲、放牧、调制干草等;发育前期耐低温能力强,生态适应性广,适宜于在≥10℃有效积温≥2 200℃·d的地区推广种植。
The superior tetraploid hybrid wheatgrass variety SZB-02 was selected from colchicine induced chromosome doubling F1 hybrids after widely crossing of Agropyron cristatumcv.Fairway and Agropyron mongolicum.And then,the new variety of tetraploid hybrid wheatgrass-Mengza No.1was obtained after a series of tests including varieties comparison,regional and production which lasted 13 years.Mengza No.1is a perennial gramineous herb with fibrous root system,regular plant growth,lanceolate leaf length,and wide panicle type.The fresh grass yield,dry grass yield and seed yield of Mengza No.1with twice mowing per year was 25 938.35kg·hm-2,9 552.33kg·hm-2 and 802.37kg·hm-2,respectively,which suggest that this variety has relatively high grass yield.Mengza No.1has crude protein content of16.13 %in anthesis,and is rich in nutritional composition such as crude fat,nitrogen free extract,calcium and phosphorus.It also has characteristics of soft texture,high leaf yield and good palatability which can be used for green fodder,graze and hay.It has strong resistance to low temperature in earlier development stage and wide ecological adaptability,which is suitable to be applied in the areas with the effective accumulated temperature more than 2 200 ℃·d(≥10 ℃).
出处
《草业科学》
CAS
CSCD
北大核心
2015年第5期738-744,共7页
Pratacultural Science
基金
国家自然科学基金面上项目(31172254)
关键词
航道冰草
蒙古冰草
四倍体蒙杂冰草1号
选育
产量
营养品质
A.cristatum cv.Fairway
A.mongolicum
tetraploid Mengza No.1 wheatgrass
breeding
yield
nutritional quality
