超甜玉米新品种灰色关联综合评估初探

A COMPREHENSIVE EVALUATION OF SOME NEW SWEET MAIZE VARIETIES WITH THE GREY RELATION DEGREE

摘要:

采用灰色关联度分析法对参加广东省1999年秋植超甜玉米（Zea mays var.rugosa)新品种区域试验的8个品种，从优质，高产，早熟，株高和果穗形态特征等共17个性状进行了分析，综合评估结果表明：超甜711综合性状表现最优，与参考品种最为接近，具有鲜穗单产最高，茎秆粗壮，果穗大等特点；穗甜2号表现好，早熟，品质优良，株高和穗位高度适中等特性；粤甜2号综合性状表现最差，其余各参试品种综合性状表现由好至差的排序为金凤3号，金银2号，粤甜3号，超甜28和穗甜1号，此结果还表明，按各品种的灰色关联度大小排序所进行的综合评估结果能充分反映品种的综合性状表现，是符合客观实际的。

Abstract:

Eight cultivars of sweet maize (Zea mays var. rugosa), which attended Guangdong provincial supersweet maize regional experiment in autumn cropping season in 1999, were evaluated by using the relation degree of grey system theory. They were analyzed from 17 traits including high-yielding, early-maturing, good-quality, plant height and green ear morphological characters. The comprehensive evaluation results showed that Supersweet 711 ranked first, which gave high yield, having strong stems and big green ears;Suitian 2 ranked second， having traits of early maturing， good quality and a appropriate plant height with medium ear height．The unweighted relation degree of other tested varieties ranked in descending order being Jingfeng 3，Jinyin 2，Yuetian 3，Supersweet 28，Suitian 1 and Yuetian 2． The weighted relation degree was in the order：Supersweet 711> Jinfeng 3>Suitian 2>Yuetian 3>Supersweet 28>Yuetian 2>Jinyin 2>Suitian 1．