高温干旱对龙眼种质群体果实性状的影响

Effect of high temperature and drought condition on the colony fruit character of longan

分析比较了2002年、2003年国家果树种质福州龙眼圃中44份龙眼种质,在气候条件差异较大的两年间果实性状的变异,结果表明,果实生长发育期不同的气候条件对龙眼群体的果实性状产生显著影响,高温干旱限制了单果重、果皮重、种子重、果肉重和果皮厚度的增长,却有利于提高可溶性固形物含量,果实可食率变化不显著;相关分析表明,不同气候条件下,龙眼单果重与果皮重、种子重、果肉重,可食率与果肉重,果皮重与果皮厚度、种子重、果肉重,种子重与果肉重间均存在极显著正相关。

The characteristics mutation of forty-four species longan fruit between two years with larger climatic difference （2002 year and 2003 year） in Fuzhou longan gardeR of national fruit germplasm resource were analysed. The result showed that various climatic condition had great effect on the longan fruit characteristic, high temperature and draught condition restricted the colony multiplying of the weight of per fruit, pericarp, seed and flesh and the thickness of pericarp, but enhanced the soluble solids content, and had a little effect on edible percent. Under different climatic condition, the weight per fruit had highly significant positive correlation with the weight of pericarp, seed and flesh, the edible percent and the weight of flesh, the weight of pericarp and the weight of seed, flesh and the thickness of the pericarp were in highly significant postive correlation, as well as the weight of seed and the weight of flesh.