秦岭石蝴蝶人工种群花器变异现象研究
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陕西省重点研发计划(2018NY042);


Study on Variation of Floral Organs in Artificial Petrocosmea qinlingensis Population
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    摘要:

    以人工栽培的秦岭石蝴蝶为实验材料,通过观察并记录花器官形态和数目的变化,初步探讨秦岭石蝴蝶花器变异规律,并分析了导致其变异的诱因。结果显示:(1)在观察的1 996朵秦岭石蝴蝶花朵中,发现了17种花冠变异类型、5种萼片变异类型和7种可育雄蕊变异类型,总变异率分别为34.57%、38.38%和32.67%。(2)秦岭石蝴蝶花梗或可分支,花梗苞片数目2~3枚。(3)相关性分析结果表明,下唇数目与可育雄蕊数目呈正相关,相关系数为0.927 4,而上唇数目与可育雄蕊数目呈负相关,相关系数为-0.481 1,结合花型图示分析这可能与秦岭石蝴蝶雄蕊着生于花冠下唇内侧近基部有关。该研究统计的秦岭石蝴蝶变异类型丰富,可能对于今后秦岭石蝴蝶的系统进化、花器官发育、生殖生态以及分子遗传方面研究奠定了基础,也为培育不同观赏价值的品种提供思路。

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    The artificially cultivated P. qinlingensis was used as an experimental material. The variation law of floral organs was discussed and the causes of variation were analyzed, through the observation and statistics of the organ morphology and number. The results showed that: (1) a total of 17 species of corolla variation, 7 types of fertile stamens and 5 types of sepal variants were found in the 1996 P. qinlingensis flowers observed. The total mutation rates were 34.57%, 38.38% and 32.67%, respectively. (2) P. qinlingensis peduncle may be branched, and the number of sepals was 2~3 on the peduncle. (3) Correlation analysis showed that the number of lower lips was positively correlated with the number of fertile stamens, and the number of upper lips was negatively correlated with the number of fertile stamens. The correlation coefficients were 0.927 4 and -0.481 1, respectively. This may be related to the growth of P. qinlingensis fertile stamens in the inner base of the lower lip of the corolla, combined with floral diagram analysis. The abundant variation types of P. qinlingensis in this study may lay a foundation for the study of system evolution, floral organ development, reproductive ecology and molecular genetics in the future, and provide ideas for cultivating varieties with different ornamental values.

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孙 旺,蒋景龙,陶小斌,等.秦岭石蝴蝶人工种群花器变异现象研究[J].西北植物学报,2019,39(2):349-358

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  • 在线发布日期: 2019-03-22
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