抗逆高羊茅新品种黔草1号的特征特性   总被引：1，自引：2，他引：1  

吴佳海  牟琼  罗天琼  唐成斌  尚以顺  莫本田  瓦庆荣 《种子》2007,26(12):101-104

介绍了抗逆高羊茅新品种黔草1号(Festuca arundinacea Schreb.cv.Qiancao No.1)的育种过程及其优良特性。在贵州省及四川、广西、新疆等地种植的种子平均产量比对照品种凌志和原始群体高出20%以上。返青期比引进品种凌志提前7天,枯黄期晚3天;是目前我国育成的自主知识产权优良抗逆草坪型新品种,是运动场草坪、环境绿化、生态治理和改良天然草场的理想草种之一。适宜我国长江中下游低山、丘陵等地区种植。  相似文献   

Systemic Concentrations of Endogenous and Exogenous FSH in Anoestrous Ewes Superstimulated with Folltropin^®-V     

PM Bartlewski  KJ Fuerst  BD Alexander  WA King 《Reproduction in domestic animals》2009,44(2):353-358

The synchronization of follicular waves with medroxyprogesterone acetate (MAP) and oestradiol‐17β (E₂‐17β) prior to ovarian superstimilation in anoestrous ewes reduces the variability in superovulatory responses by an unknown mechanism. Follicle stimulating hormone (FSH) is a primary promoter of antral follicular development, but the relevance of circulating FSH concentrations to the superovulation performance in ewes has not been examined. Eighteen anoestrous Rideau Arcott ewes (May–June) were superovulated with Folltropin^®‐V (porcine FSH), with (n = 8; treated ewes) or without (n = 10; control ewes) a single i.m. dose of 350 μg of E₂‐17β, given on the sixth day of a 14‐day treatment with MAP‐releasing intravaginal sponges (60 mg). The superovulatory treatment, begun 6 days after E₂‐17β injection, consisted of six i.m. applications of Folltropin^®‐V given twice daily (at 08:00 and 16:00 h), followed by an i.m. injection of GnRH (50 μg). Blood samples collected every 8 h throughout the 3‐day treatment, were analysed by radioimmunoassays for concentrations of ovine and porcine FSH, using species‐specific standards and primary antibodies. Serum concentrations of oFSH were greater (p < 0.05) in the controls compared to treated ewes at 40, 64 and 72 h and the variability in mean oFSH concentrations was greater (p < 0.05) in control ewes at 40, 48, 64 and 72 h after the 1^st Folltropin^®‐V injection. There were no differences (p > 0.05) between the two groups in serum concentrations of pFSH. Significant correlations were recorded between the number of corpora lutea (CL) and oFSH concentrations at 8 h (r = 0.72, p < 0.05), 16 h (r=0.63, p < 0.05) and 64 h (r = 0.84, p < 0.01) after the 1^st Folltropin^®‐V injection. The total number of recovered embryos was positively correlated to oFSH concentrations at 56 h (r = 0.69, p < 0.05). We concluded that changes in endogenous FSH concentrations during ovarian superstimulation with pFSH might contribute to the variability in superovulatory responses in ewes.  相似文献