雾培马铃薯块茎建成相关性状的观察

Traits Relevant to Tuberization of Potato in Aeroponic

为探索马铃薯块茎建成相关性状的动态发育规律及其相关性,对雾培条件下二倍体马铃薯C×E群体的株高、匍匐茎长、根长、一级匍匐茎数、微型薯数的生长动态及其与单株产量的相关性进行研究。结果表明：C×E群体上述5个农艺性状均存在超亲分离;移栽后40天内是根系生长发育的主要时期;移栽后50-70天是株高增长的主要时期;移栽后30-50天是匍匐茎发生的高峰期,一级匍匐茎数在移栽后60天达到最大值;匍匐茎的伸长主要是在移栽后40-50天,同时此时块茎开始膨大。相关性分析结果显示：微型薯数与匍匐茎长呈显著或极显著正相关,与一级匍匐茎数呈极显著正相关;单株产量与一级匍匐茎数呈极显著正相关。因此,匍匐茎长、一级匍匐茎数是筛选雾培优良基因型植株的2个重要因素。

The paper aims to study the dynamical development regularity and correlation of tuberization traitsof potato. The authors observed the development dynamic and correlation with yield per plant（YP） of the plantheight（PH）, stolon length（SL）, root length（RL）, primary stolons（PS） and mini-tubers（MT） of C×E population inaeroponic. The results showed that there was obvious segregation beyond the two parents for five agronomictraits among F1. It was the major developmental stage of root during the 40 d after the transplantation. Plantheight of the potato grew rapidly from 50 d to 70 d after the transplantation. Primary stolons emerged rapidlyfrom 30 d to 50 d after the transplantation and reached its peak at 60 d. Stolons length mainly grew from 40 dto 50 d after the transplantation and the mini-tuber also began to swell. Correlation analysis showed that MT had significantly or highly and significantly positive correlation with SL, and MT had highly and significantlypositive correlation with PS. YP had highly and significantly positive correlation with PS. So, SL and PS aretwo important factors for screening the fine individual genotype of potato for aeroponic.