摘要
对几种小麦族多年生禾草及其杂交后代的生育、产草量等农艺特性进行了比较研究,结果表明,加拿大披碱草×野大麦属间杂种F1的生长速度偏向母本,株高呈双亲的中间型,具有父本野大麦的强短根茎特性和果后营养期长的优良特性,表现出很强的分蘖能力和再生能力,其花粉可育率为1.19%,结实率0,杂种平均优势16.98%。蒙古冰草×航道冰草种间杂种F1的生长速度和株高均介于双亲中间,具有父本航道冰草分蘖和再生能力强的特性,花粉可育率为26.75%,结实率5.30%,杂种平均优势19.35%;BC1的生长速度呈双亲的混合型,株高、分蘖性和再生性偏向其回交父本蒙古冰草,花粉可育率为46.67%,结实率14.77%,BC1育性恢复明显。
The agronomic characters of several perennial Triticeae grasses and their hybrids, such as growthdevelopment, forage yield and so on, were studied. The results showed that growth rate of genus hybrid F1 of Elymus canadensis×Hordeum brevisubulatum tended maternal, the plant height was in the middle of parents. F1 hybrid had the characters of strong short rhizome and long growth period after fructification from paternal and had the strong vigor of tiller and regeneration; the pollen fertility rate was 1.19%, the seed set was 0, and the average hybrid preponderance (HP) was 16.98%. The growth rate and plant height of species hybrid F1 of Agropyron mongolicum ×A.cristatum cv. Fairway were in the middle of parents. F1 hybrid had the stronger vigor of tiller and regeneration from paternal; the pollen fertility rate was 26.75%, the seed set was 5.30%, the average HP was 19.35%; The growth rate of backcross 1(BC1) of (A.mongolicum×A.cristatum cv. Fairway)×A.mongolicum was mixed type of their parents, the plant height and the vigor of tiller and regeneration tended to recurrent paternal; the pollen fertility rate was 46.67%, the seed set was 14.77%, and the fertility of BC1 was restored obviously.
出处
《草业学报》
CSCD
2003年第3期83-89,共7页
Acta Prataculturae Sinica
基金
国家自然科学基金项目(30160058)
内蒙古自治区高等学校科学研究重点领域项目(ZD01043)
教育部留学回国人员科研启动基金项目(2001345)
内蒙古自治区自然科学基金项目(2002305)资助。
关键词
小麦族多年生禾草
远缘杂种
生长发育
产草量特性
perennial grasses of Triticeae
wide hybrid
growth and development
characters related to yield
