Karyotypes of Whytockia (Gesneriaceae)

Abstract

Abstract:

The karyotypes of the genus Whytockia was investigated in order to reveal its sys-

tematic position in the tribe Klugieae and the evolution of karyotypes within this genus. The

chromosome numbers are 2n＝18 with their length over 2.0 µm in all the investigated

species of Whytockia, which represents the most primitive characteristics in the tribe

Klugieae. This paper suggests that x＝9 be the primitive basic number of chromosomes in

the Klugieae. The morphology of the resting nuclei in Whytockia belongs to the complex

chromocenter type. The chromosomes at mitotic prophase are classified into the gradient

type. The evolution of karyotypes in Whytockia is toward increase of the chromosomes with

submedian centromeres and especially those with subterminal centromeres. The karyotype of

the variety W. tsiangiana (Hand.-Mazz.)A. Weber var. wilsonii A. Weber is distinctly

different from that of W. tsiangiana var. tsiangiana, which conforms well with the gross

morphology. This paper suggests that this variety be separated from W. tsiangiana as an

independent species with affinity to W. bijieensis.

Key words: Asymmetry, Basic number, Evolution, Karyotype, Whytockia W. W. Smith

WANG Yin-Zheng, GU Zhi-Jian, HONG De-Yuan. Karyotypes of Whytockia (Gesneriaceae)[J]. .

[1]	DENG Liangkai, HUANG Yong, SHI Yaling, WAN Dan, LI Lin. Network structure characteristics and spatial pattern evolution of educational facilities in mountainous towns：a case study of Wanzhou District of Chongqing [J]. , 2020, 37(5): 629-639.
[2]	XU Lifan, WANG Xiong. A conformal focusing microwave hyperthermia system based on differential algorithm [J]. , 2020, 37(5): 708-713.
[3]	LI Weilin, CHENG Huihong, ZHANG Huai, SHI Yaolin. Three-dimensional numerical modeling of the tectonic evolution of the serial basins in the Hexi Corridor in Northwest China [J]. , 2019, 36(2): 196-207.
[4]	LIU Jianming, ZHANG Yuxiu, ZENG Lu, JU Yiwen, RUI Xiaoping, QIAO Xiaojuan. Structure-controlled karst development in Middle-Upper Proterozoic strata in the Zhangfang area in Beijing [J]. , 2019, 36(2): 208-217.
[5]	LIU Hongyan, CHEN Wen. Evolution of size distribution of primary schools in Nanjing City from the perspective of school system [J]. , 2019, 36(1): 64-71.
[6]	REN Jiamin, MA Yanji. Spatial-temporal evolution characteristics of decoupling relationship between industrial growth and industrial atmospheric pollution in Jilin Province [J]. , 2019, 36(1): 72-81.
[7]	TIAN Xiuqin, GAO Jinlong, CHEN Wen, CHEN Jianglong. Evolution of rural land in developed areas within the context of population shrinkage: evidence from Changshu City of Jiangsu Province [J]. , 2018, 35(5): 645-653.
[8]	CHENG Lanhua, YANG Degang. Spatio-temporal evolution characteristics of health resources mismatch in Urumqi-Changji region [J]. , 2018, 35(3): 382-390.
[9]	TU Tangqi, CHEN Jianglong, WEI Yehua Dennis, LIANG Qichun, ZHANG Yinghao. Spatial structure and evolution of basic education facilities in Nanjing in China [J]. , 2018, 35(1): 66-74.
[10]	ZHAO Yannan, YANG Degang, ZHANG Xinhuan, XIONG Chuanhe, CHEN Dongli. Temporal and spatial evolution of top grade hotel industry and its influencing factors in central district of Urumqi [J]. , 2017, 34(1): 77-85.
[11]	ZOU Hui, DUAN Xuejun, ZHAO Haixia, WANG Lei. Spatial evolution of pollution-intensive industries and its effects on pollution emissions in Yangtze River Delta [J]. , 2016, 33(5): 703-710.
[12]	YING Chenglong, LEI Jun, DUAN Zuliang, ZHANG Lu . National living pattern and its evolution in Urumqi from 1982 to 2010 [J]. , 2016, 33(3): 387-397.
[13]	TANG Hong, CHEN Dabo. Development features and temporal-spatial evolution of economy in Central Asia in the past 20 years [J]. , 2015, 32(2): 214-220.
[14]	ZHAO Hongbo, MA Yanji. Spatial-temporal evolution and driving mechanisms of regional economic disparities of old industrial base in Northeast China：a case study of the central Jilin province [J]. , 2014, 31(2): 187-197.
[15]	TENG Fei, LIU Yi, GUO Teng-Yun, DONG Guan-Peng. Regional competitive industries in Beijng and their evolution based on sky-line diagram of input-output technique [J]. , 2012, 29(5): 614-620.

Karyotypes of Whytockia (Gesneriaceae)

Knowledge

Abstract

Cite this article

share this article

References

Related Articles 15

Recommended Articles

Metrics

Comments