不同种源丝栗栲种子性状变异
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摘要
为了探讨丝栗栲(Castanopsis fargesii)种子的变异规律,对采自贵州省荔波县、都匀市和三都县3个地理种源13个家系的丝栗栲种子的长、宽、长宽比和百粒重进行对比分析。结果表明:3个不同地理种源的丝栗栲种子的种子长、种子宽、长宽比和种子百粒重的性状差异达到极显著水平;种源间各性状指标的变异幅度较大,分别为种子长0.176%～4.034%、种子宽1.443%～6.389%、长宽比1.392%～4.808%、百粒重2.773%～13.470%。荔波种源的各项指标变异系数均为最大,都匀种源各项指标的变异系数均为最小;各指标间均具有极显著相关性,种子长与种子宽、百粒重呈极显著正相关,与种子长宽比呈极显著负相关;种子宽与种子长宽比呈极显著负相关,与百粒重呈极显著正相关;种子长宽比与百粒重呈极显著负相关。3个种源中,都匀种源的综合指标最优,可作为优良种源进行良种培育。
13 families of Castanopsis fargesii seeds from three geographical sources in Libo,Duyun and Sandu of Guizhou province were collected to compare the length,width,length to width ratio and hundred-grain weight in order to explore the variation. Results showed that the differences of seed length,seed width,length to width ratio and hundred-grain weight of three different geographical origins were extremely significant. The variations of each index among provenances were relatively large with seed length of 0.176% to 4.034%,seed width of 1.443% to 6.389%,length to width ratio of 1.392% to 4.808% and hundred-grain weight of 2.773% to 13.470%. The coefficient of variation of Libo source's each indicator was the largest,while Duyun source was the smallest. There were significant correlation among indicators. The seed length had significantly positive correlation with seed width and hundred-grain weight,but had significantly negative correlation with length to width ratio;seed width had significantly negative correlation with seed length to width ratio and had significantly positive correlation with hundred-grain weight,but seed length to width ratio had signifcantly negative correlation with hundred-grain weight. Among three provenances, the comprehensive index of the Duyun seeds source was the best,and it could be used as an excellent seed source for breeding.
13 families of Castanopsis fargesii seeds from three geographical sources in Libo,Duyun and Sandu of Guizhou province were collected to compare the length,width,length to width ratio and hundred-grain weight in order to explore the variation. Results showed that the differences of seed length,seed width,length to width ratio and hundred-grain weight of three different geographical origins were extremely significant. The variations of each index among provenances were relatively large with seed length of 0.176% to 4.034%,seed width of 1.443% to 6.389%,length to width ratio of 1.392% to 4.808% and hundred-grain weight of 2.773% to 13.470%. The coefficient of variation of Libo source's each indicator was the largest,while Duyun source was the smallest. There were significant correlation among indicators. The seed length had significantly positive correlation with seed width and hundred-grain weight,but had significantly negative correlation with length to width ratio;seed width had significantly negative correlation with seed length to width ratio and had significantly positive correlation with hundred-grain weight,but seed length to width ratio had signifcantly negative correlation with hundred-grain weight. Among three provenances, the comprehensive index of the Duyun seeds source was the best,and it could be used as an excellent seed source for breeding.
引文
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[11]刘志龙,虞木奎,唐罗忠,等.不同种源麻栎种子形态特征和营养成分含量的差异及聚类分析[J].植物资源与环境学报,2009,18(1):36-41.
[12]唐晓倩,刘广全,李庆梅,等. 8种落叶栎类种子形态特征比较分析[J].西北林学院学报,2012,27(4):60-64.
[2]罗坤水,杨春霞,林小凡,等.壳斗科树种育苗技术研究[J].江西林业科技,2008(6):6-9.
[3]李燕.山西省壳斗科植物资源及园林应用策略[J].山西农业科学,2009,37(11):30-32.
[4]潘尧燕.低产丝栗栲次生林林分特征研究[J].林业勘察设计,2010(1):74-76.
[5]王艳芳,谢双喜,张磊.贵州习水自然保护区丝栗栲群落主要种群种间联结性研究[J].广东农业科学,2011(6):168-171.
[6]赵广东,王兵,李少宁,等.江西大岗山常绿阔叶林优势种丝栗栲和苦槠栲不同叶龄叶片光合特性研究[J].江西农业大学学报,2005,27(2):161-165.
[7]林芳.武夷山丝栗栲天然林群落的生物量及其分配规律[J].江西农业大学学报,2006,28(1):74-77.
[8]吴云峰,周礼洋,姚理武,等.丝栗栲等9个树种容器育苗技术及应用效果[J].林业科技开发,2009,23(3):112-116.
[9]杨志玲,杨旭,谭梓峰,等.厚朴不同种源及家系种子性状的变异[J].中南林业科技大学学报,2009,29(5):49-55.
[10]柯文山,钟章成,席红安,等.四川大头茶地理种群种子大小变异及对萌发、幼苗特征的影响[J].生态学报,2000,20(4):697-701.
[11]刘志龙,虞木奎,唐罗忠,等.不同种源麻栎种子形态特征和营养成分含量的差异及聚类分析[J].植物资源与环境学报,2009,18(1):36-41.
[12]唐晓倩,刘广全,李庆梅,等. 8种落叶栎类种子形态特征比较分析[J].西北林学院学报,2012,27(4):60-64.