西北林学院学报2024，Vol.39Issue(4)：104-111,188,9.DOI:10.3969/j.issn.1001-7461.2024.04.13
澜沧县不同海拔梯度云南栘[木衣]花、果物候观测及表型变异分析
Observation of Flower and Fruit Phenology of Docynia delavayi at Different Altitudinal Gradients in Lancang County and Analysis of Phenotypic Variation
摘要
Abstract
To investigate the effects of different altitudes on the phenological phases of Docynia delavayi and their flower and fruit phenotypic variation levels in Nuozadu Township,Lancang County,Yunnan Province,100 individuals from 10 altitude gradients(1 500-2 000 m)in Nuozadu Township were used as the study objects to observe their flowering and fruiting phenology,and a total of 11 phenotypic traits of flowers and fruits were analysed for variation.The results showed that 1)the flowering period of D.dela-vayi was 30-34 days;the fruiting period was 188-198 days.The maximum difference among different al-titude gradients was 4 days at the first flowering period,6 days at the falling period,11 days at the first fruiting period and 9 days at the fruit drop period.With the increase of altitude,the phenological periods of flowering and fruiting of D.delavayi gradually delayed.2)There were some variations in flower phenotyp-ic traits,and fruit phenotypic traits were relatively stable.The coefficients of variation for each phenotypic trait of flowers at different altitudes ranged from 13.54％to 24.15％,with an average coefficient of varia-tion of 17.79％.Among the fruit traits,the coefficients of variation for fruit longitudinal diameter,fruit transverse diameter and single fruit weight were 7.93％,5.97％and 6.15％,respectively,with an average coefficient of variation of 7.21％.The coefficient of variation was relatively low.The mean values of the co-efficient of variation for both flower and fruit phenotypic traits were the greatest at the altitude 1 801 to 1 850 m.With the increase of altitude,OW(ovary width),OL(ovary length),CW(calyx width),PL(pet-al length)and PW(petal width)showed gradually decreasing trend.3)Correlation analysis showed that all traits were not significantly correlated with altitude,except for OW,which was significantly and negatively correlated with altitude.There were significant or highly significant correlations between all traits except anther length,OW,calyx length,petal length and fruit longitudinal diameter,which were not significantly correlated with other traits.4)Cluster analysis showed that the 10 altitude populations could be clustered into three distinct branches,which were low altitude area,middle altitude area and high altitude area.This study can provide a theoretical basis for the selection and breeding of good species of Docynia delavayi.关键词
云南栘[木衣]/海拔梯度/物候期/表型变异Key words
Docynia delavayi(Franch.)Schneid./altitudinal gradient/phenophase/phenotypic variation分类
农业科技引用本文复制引用
马海涛,刘宇,杨林,徐鎏,李婧婷,王大玮..澜沧县不同海拔梯度云南栘[木衣]花、果物候观测及表型变异分析[J].西北林学院学报,2024,39(4):104-111,188,9.基金项目
国家自然科学基金项目(32060350) （32060350）
云南省"万人计划"青年拔尖人才专项(YNWR-QNBJ-2020-230). （YNWR-QNBJ-2020-230）
