摘要
研究了红榉自然分布区4个省份15个种源的种子长、宽、长宽比及千粒重等性状的变异。结果表明:(1)红榉种源间种子长、宽、长宽比和千粒重等性状的差异均达极显著水平,且种源水平上各性状的遗传力分别为0.901 8、0.921 0、0.922 1和0.900 8,单株水平上的遗传力分别为0.926 0、0.979 2、0.932 6和0.992 5,表明红榉种子形态性状存在着丰富的遗传变异,且受到中等程度以上的遗传控制;(2)相关分析表明,红榉种子长、宽及千粒重之间存在着极显著相关关系,且红榉种子性状无明显的经向和纬向变异,种子长主要受年均温和无霜期影响,种子宽主要受1月均温影响,而千粒重主要受年均温的影响;(3)聚类分析表明,红榉种子形态特征地理变异呈现区域板块变异模式和随机变异模式等。
The variation patterns of four seed morphologic characters were studied by usingZelkova schneiderianaHand-Mazz. seeds as the tested materials, which were from 15 provenances of four provinces in natural distribution. The results show as follows: (1) Highly significant differences were found among different provenances in seed length, width, ratio of length to width, and 1000-grain-weight, and theirs heritability were 0.9018, 0.921 0, 0.922 1 and 0.900 8 at the provenance level, and 0.926 0, 0.979 2, 0.932 6 and 0.9925 at the individual level, respectively; this indicated that in these seed morphologic traits there were abundant genetic variation, and were controlled by moderate-higher genetic control. (2) There were highly significant correlation among seed length, seed width and 1000-grain-weight, and these seed morphologic traits demonstrated no obvious longitude or latitude variation tendency, the seed length was mainly affected by annual average temperature and frostless days, the seed width was affected by average temperature in January, While 1000-grain-weight was affected by annual average temperature. (3) Cluster analysis suggested that the geographic variation of seed morphologic traits of some distribution zones ofZ. schneideriana represented regional block variation pattern, while the others showed random variation pattern.
出处
《中南林业科技大学学报》
CAS
CSCD
北大核心
2015年第1期1-7,共7页
Journal of Central South University of Forestry & Technology
基金
国家林业公益性行业科研专项(200904011)
国家"十二五"科技支撑计划项目(2011BAD38B03)
关键词
红榉
种源
种子形态性状
变异
Zelkova schneideriana Hand-Mazz.
provenance
seed morphologic trait
variation
