群体表型性状研究揭示环境与遗传因素对霍山石斛表型及物种分类的影响

焦振彬, 罗毅波

Effects of environmental and genetic factors on phenotypic traits and species classification of Dendrobium huoshanense

Zhenbin Jiao, Yibo Luo

表2 霍山石斛及其近缘种假鳞茎与花部表型性状差异

Table 2 Differences in phenotypic traits of pseudobulbs and flowers among Dendrobium huoshanense and related species

	霍山石斛 D. huoshanense			河南石斛 D. henanense	细茎石斛 D. moniliforme	铁皮石斛 D. catenatum
	Wild type	F₁ generation	F₂ generation	河南石斛 D. henanense	细茎石斛 D. moniliforme	铁皮石斛 D. catenatum
假鳞茎数量 No. of pseudobulbs	93	557	721	98	217	414
假鳞茎茎长 Pseudobulb length (cm)	1.84 ± 0.85^A	5.70 ± 2.63^B	5.51 ± 2.70^B	8.76 ± 2.12^C	18.54 ± 5.87^E	14.97 ± 8.26^D
假鳞茎直径 Pseudobulb diameter (cm)	0.45 ± 0.07^A	0.70 ± 0.13^B	0.59 ± 0.13^C	0.43 ± 0.06^AD	0.39 ± 0.09^F	0.53 ± 0.11^E
假鳞茎茎长直径比 Length/diameter ratio of pseudobulb	4.17 ± 2.03^A	8.40 ± 4.06^B	9.84 ± 5.42^C	20.75 ± 5.90^D	48.99 ± 16.88^F	30.16 ± 19.40^E
假鳞茎节长 Internode length of pseudobulb (cm)	0.65 ± 0.18^A	1.21 ± 0.35^B	1.19 ± 0.36^B	1.52 ± 0.32^C	2.38 ± 0.55^D	1.65 ± 0.57^c
假鳞茎节数 No. of pseudobulb internodes	3.67 ± 0.81^A	5.85 ± 1.35^B	5.87 ± 1.58^B	8.45 ± 1.44^C	10.42 ± 2.30^d	11.17 ± 3.21^D
花朵数量 Number of flowers	2	132	181	5	138	235
中萼片长 Dorsal sepal length (cm)	1.35 ± 0.07^A	1.32 ± 0.19^AB	1.45 ± 0.23^AC	1.62 ± 0.15^ABCD	1.47 ± 0.27^ACD	1.77 ± 0.23^ADE
中萼片宽 Dorsal sepal width (cm)	0.60 ± 0^A	0.66 ± 0.11^B	0.62 ± 0.09^abC	0.70 ± 0.09^ABCD	0.51 ± 0.08^DF	0.63 ± 0.07^bCDE
中萼片长宽比 Length/width ratio of dorsal sepal	2.25 ± 0.11^A	2.03 ± 0.34^AB	2.37 ± 0.43^AC	2.35 ± 0.31^ABCD	2.90 ± 0.45^ADE	2.83 ± 0.40^ADE
花瓣长 Petal length (cm)	1.40 ± 0^A	1.30 ± 0.20^B	1.43 ± 0.22^ACF	1.52 ± 0.07^AbCDF	1.49 ± 0.24^DF	1.67 ± 0.20^DE
花瓣宽 Petal width (cm)	0.80 ± 0^A	0.77 ± 0.14^AB	0.69 ± 0.13^C	0.82 ± 0.04^ABcD	0.52 ± 0.09^F	0.56 ± 0.07^E
花瓣长宽比 Length/width ratio of petal	1.75 ± 0^A	1.72 ± 0.29^AB	2.11 ± 0.40^C	1.86 ± 0.16^ABCD	2.92 ± 0.47^E	3.01 ± 0.46^E