opposite phyllotaxis

The withers height,body length,chest girth and body weight were measured and its accumulation growth,absolutely growth and relative growth were calculated.

通过对西安现代化农业开发公司草滩农场170头荷斯坦牛后备牛初生,4月龄至16月龄体高、体长、胸围及体重进行测定,统计各月龄体高、体长、胸围及体重的累积生长的平均值、绝对生长值、相对生长值,对应绘制出四项指标的累计生长、相对生长曲线;分析了西安地区中国荷斯坦牛的早期生长发育状况,为制定后备牛的培育方案奠定了基础。

Signficant changes of plant shapes,relative growth indexes and some physiological parameters concerning the two cultivars of Hosta plantaginea undulate and decorata were observed after the plants were treater with mepiquant chloride (DPC) and paclobutrazol (PP_(333)) solutions.

两个品种的重瓣玉簪经甲哌啶（ＤＰＣ）和多效唑（ＰＰ（３３３））喷施后，植株株型、相对生长及某些生理指标发生了显著的变化。

The double plants cultivation of oppositifolious seeds is a kind of new corn high yield cultivation technology, 5TN-2 maize thresher is designed threshing for corn oppositifolious seeds.

玉米对生种子双株栽培是一种新的玉米高产栽培技术,5TN-2型玉米对生种子脱粒机是为其配套的对生种子脱离机具。

The results indicated that opposite maize had widespread heterosis like alternative maize; yield advantage of opposite F1 (alternative×alternative) was better than that of F1 (opposite×opposite)and F1 (alternative×opposite or reverse); general combining ability of yie.

结果表明:对生玉米同互生玉米一样具有普遍的杂种优势,在产量性状上F1对生株优势互×互组合大于对×对组合和对×互(互×对)组合;对生性状的转育对产量性状的一般配合力有降低效应,而含有对生基因的互生玉米具有较高的一般配合力效应,因此,在对生玉米育种中可以利用含有不同对生基因的互生自交系作亲本来组配杂交组合(互×互),从而获得较高的制种产量和高产的对生杂交种。

The results indicated that the oppositifolious maizes had two pairs of satellites, while the alternate maizes only had one pair.

本文利用对生性状转育获得的六组对生和互生姊妹系,通过风油精法染色体制片,首次研究了对生玉米与互生玉米的染色体核型差异。