摘要
为了有效地利用甜高粱种质资源，促进育种工作，对206份国内外甜高粱种质资源的16个形态性状和农艺性状进行遗传多样性及相关性分析。结果表明：主脉色质地、穗形、颖壳色、粒色、颖壳包被程度频率分布较为分散；芒性分布较为集中，有芒的品种居多。出苗至挑旗天数、全生育期、株高、主穗长、茎粗、单株鲜茎重、单穗粒重、千粒重、出汁率、锤度都存在较大的变异，变异系数幅度为9．59％-47．02％。各性状多样性指数均较大，平均1．9371；出汁率多样性指数最小，为1．5954；株高多样性指数最大，为2．1006；表明206份甜高粱资源拥有丰富的遗传多样性。全生育期、出苗至挑旗天数与株高的相关系数分别为0．6501和0．7914，均达到极显著水平；株高主要决定于挑旗以前。全生育期与株高、茎粗、单株鲜茎重的相关系数分别是0．6501、0．6313、0．6631，呈极显著正相关，说明生育期越长，越有利于物质积累，产量越高。全生育期与锤度呈正相关，但相关系数较低，说明茎秆锤度与生育期有一定关系。
In order to efficiently use sweet sorghum germplasm in breeding program, genetic diversity and relationship of main agronomic characters were assessed in a collection of 206 domestic and foreign sweet sorghum germplasm. The results showed that frequency distributions of biological traits such as midrib color and texture, panicle shape, glume color, grain color, grain covering were dispersed ; awn character distributed more convergent; most varieties had awns. The agronomic traits such as days from emergence to flag leaf, whole growth period, plant height,main panicle length, stem diameter, grain weight per spike, 1000-grain weight, stem juice yield, brix and fresh stem weight per plant had greater coefficient of variability, ranging from 9.59 % to 47.02 %. All agronomic traits tested showed great diversity indexes, ranging from 1. 5954 to 2. 1006 with an average of 1. 9371, which showed this collection of sweet sorghum germplasm had great diversity. Plant height is significantly and positively related to whole growth period and days from emergence to flag leaf, with the correlation coefficient 0. 6501 and 0. 7914,showing plant height was established mainly before flag leaf. Plant height, stem diameter and fresh stem weight per plants showed significant and positive relationship with growth and development duration, which explained that the longer growth and development duration is conducive to biomass accumulation.
出处
《植物遗传资源学报》
CAS
CSCD
2008年第3期302-307,共6页
Journal of Plant Genetic Resources
基金
科技部"十一五"科技支撑计划项目(2006BAD07A04)
公益性行业(农业)科研专项经费项目(nyhyzx07-011)
关键词
甜高粱
遗传多样性
性状分析
相关系数
Sorghum bicolor var. succharafum
Genetic diversity
Character analysis
Correlation coefficient
