不同授粉方式下‘度尾蜜柚’亲和性及其生物学效应

 通过3种授粉处理, 对‘度尾蜜柚’自交不亲和性及产生的若干生物学效应进行了观察。结果表明: 在正常自交的情况下, ‘度尾蜜柚’存在不亲和性, 大部分果实无籽, 随着果实的成熟, 果形指数逐步降低, 中心柱空心, 果顶皮层厚度逐渐变薄, 裂瓣大量产生, 同时一部分果实顶部裂开, 霉菌侵染果肉, 失去食用价值; 蕾期自交能在一定程度上克服不亲和性, 产生少量的种子, 能有效防止果实横向和纵向不均衡生长, 促进果实中心柱较好地保持实心状态, 果顶皮层增厚, 从而显著降低了裂果和裂瓣; 用‘琯溪蜜柚’花粉异交授粉, 果实种子数显著增多, 果形指数变化较小, 中心柱实心, 少有裂果和裂瓣发生, 但食用品质受到影响。

Incompatibility of Citrus grandis '' Duweimiyou'' and Its Biological Effects by Different Kinds of Pollination

Three different pollination methods were used to observe the self-compatibility and some biological effects from Citrus grandis‘Duweimiyou’. The results indicated that Citrus grandis‘Duweimiyou’showed incompatibility under the condition of normal self-pollination, and most of the fruitswere seedless; thefruit shape index decreased gradually in fruit ripening, the central column was hollow, the fruit-top peel was gradually thinned, and sac cracking was substantially produced while the peel on fruit top dehisced slowly,and fungi invasion made the flesh lose edible value; Self-pollination at bud stage could solve the self-incompatibility in a certain extentwhich p roduced a few seeds, it effectively prevented fruits from growing disproportion in lateral and longitudinal, it also helped the central column of citrus fruit to maintain the solid state, and enhanced thickness of the fruit top peelwhich could significantly decrease fruit and sac cracking; Cross-pollination with Citrus g randis‘Guanximiyou’, the seed number of Citrus grandis‘Duweimiyou’increased significantly, the change of fruit shape index was relatively limited, the central column was solid, fruit and sac cracking were less, but the edible quality was affected.