青薯168的生长发育及性状间的相关性分析

马铃薯的生长发育随着生育期的变化而变化，前期以茎叶生长为主，后期则以块茎生长为主。所以，地上部性状间，以及地上部性状与地下部性状—块茎的形成有着密切的关系。地上部株高与茎叶重、叶面积之间有着极显著的正相关，相关系数分别为ｒ＝０．９３５９＊＊，和ｒ＝０．８４８８＊＊；茎叶重与叶面积系数之间呈极显著的正相关，ｒ＝０．９６０５＊＊。株高与地下部块重之间呈显著的正相关，ｒ＝０．６８４３＊，茎叶重与地下部块重间的关系为正相关，ｒ＝０．４２８５，叶面积系数与地下部块重有着微弱的正相关关系，ｒ＝０．１５３４。

GROWTH AND DEVELOPMENT AND CORRELATIONS BETWEEN MAIN CHARACTERS OF THE POTATO VARIETY QINGSHU168

The growth and development of potatoes changed with growth duration.In the early period of growth, the organic center was located on stems and leaves ,but in the later period ,the center was on tubers.There existed close associations between characters of arial part and between characters of arial part and under ground portion.The plant height was correlated highly with fresh haulm weight and leaf area index,with the correlation coefficients being 0.9350 ** and 0.8488 ** ,respectively.The correlation of fresh haulm weight with leaf area index was positive and the correlation coefficient was 0.9605 ** .The correlation of tuber weight with plant height and fresh haulm weight was also positive,and the correlation coefficients were 0.6843 * and 0.4285,respectively.The correlation of tuber with leaf area index was weak and the correlation coefficient was only 0.1534 between them.