糖果兼用蔗产量性状对蔗茎产量的效应分析

The Analysis of Effect between Yield and Yield-affecting Characters of Sugar-Fruit Cane

对12个有望作为糖果兼用蔗品种推广的甘蔗品种的产量性状如株高、茎径、公顷有效茎、蔗茎产量等进行了相关及通径分析。结果表明:株高、公顷有效茎与蔗茎产量之间存在显著、极显著正相关,茎径与蔗茎产量呈不显著负相关。各性状相互之间,株高与公顷有效茎存在不显著正相关,茎径与株高和公顷有效茎存在负相关,其中茎径与株高之间的负相关达显著水平。在对产量的效应中,公顷有效茎对产量的直接效应和总贡献最大,株高次之,茎径最小。由于甘蔗用途的改变(主要用于上市销售),因而在糖果兼用蔗的选育种和生产栽培中把主要目标放在增加公顷有效茎的同时,对植株的茎径也应给予足够的重视。为获得最大经济效益,应注意合理协调好产量三要素之间、特别是株高与茎径之间的关系。

Analyzing the main yield characters such as stalk length, diameter, effective stalks per hectare and cane yield using the correlation and path coefficient of 12 varieties of sugar-fruit cane. The results showed that stalk length and effective stalks per hectare were at significant or highly significant correlated with cane yield. And the stalk diameter was showing not significant negatively correlated with cane yield. Among the characters, stalk length was showing not significant positive correlated with effective stalks per hectare. The stalk diameter was low negatively correlated with effective stalks per hectare, and showing significant negatively correlated with stalk length specially. The direct effect and total contribution of effective stalks per hectare to yield ranked the first, the stalk length and diameter ranked the second and third. Because the using type has changed, in breeding and field cultivation of sugar-fruit cane, it should be aimed at higher effective stalks, while most paid more attention to stalk diameter too. For obtaining higher economic effect, its seams important that coordination of three characters, especial the negatively correlated of stalk diameter with stalk length.