中国假俭草结实性的比较分析

The analysis on the fruit characters of Eremochloa ophiuroides in China

本文以中国有代表性的58份假俭草〔Eremochloaophiuroides(Munro)Hack.〕种源为试验材料,以假俭草品种'Common'和'TifBlair'为对照,对中国假俭草的种子产量及其组分进行了统计分析。结果表明:中国假俭草种子产量平均为15.1g/m2,花序密度平均为1510个/m2,平均结实率为54.4%,平均百粒重0.086g,单位花序小花数平均为20.2。各组分变异系数从大到小依次为:花序密度、结实率、百粒重和单位花序小花数。假俭草种子产量高低主要由花序密度决定,结实率和百粒重也对种子产量有一定的作用,而单位花序小花数对种子产量贡献很小。不同种源种子产量存在显著性差异,产自重庆渝北的E092种源种子产量极显著高于品种'Common'、'TifBlair'及其他种源;有14份种源的种子产量在24.8～39.5g/m2范围内,均高于品种'Common',但均未达到显著水平;有17份种源的种子产量高于品种'TifBlair",但也均未达到显著水平。

The seed yield and its components of 58 accessions of \%Eremochloa ophiuroides \%(Munro) Hack. were statistically analyzed with 'Common' and 'TifBlair' as the check samples. The results showed as follows: The average seed yield of accessions of this species in China is 15.1 g/m\+\{2\}, the average density of spike 1 510 spikes/m\+\{2\}, the seedset rate 54.4%, the average weight of hundred\|grain 0.086 g and the average number of spikelet per spike 20.2. The coefficients of variation of the components of seed yield is ranked from big to small as: spike density, seedset rate, weight of hundred\|grain and the number of spikelet per spike. Significant difference is existed in the seed yield of accessions in China. E092 is ranked the first accession with the seed yield 80.2 g/m\+\{2\}, which is significantly higher than the seed yield of 'Common', 'TifBlair' and other accessions in China. The seed yields of fourteen of all accessions are from 24.8 to 39.5 g/m\+\{2\} which are higher than that of 'Common', however, no significant difference is found. The seed yields of 17 accessions are higher than that of 'TifBlair', but no significant difference is also found.