Progress on the fertility of Rhododendron

doi:10.17520/biods.2018345

Abstract

Abstract:

To provide a reference for researchers, achievements and progress in recent years on the fertility of Rhododendron in China and abroad were summarized. (1) There are polyploidy in subgen. Rhododendron and subgen. Pentanthera, and even various ploidy in the same species. (2) Under natural pollination, in addition to the common intra-specific cross- and self-fertilization, inter-specific cross-fertilization was also widespread in subgen. Hymenanthes, subgen. Rhododendron and subgen. Tsutsusi. There were also some cases of inter-subsection cross. (3) Self compatibility (SC) and self incompatibility (SI) simultaneous exist in Rhododendron. Subsect. Fortunea shows all types from self sterile to high fertility. Self incompatibility often occurs in subgen. Tsutsusi and subgen. Azaleastrum and although self-fertilization is usually considered to be a passive adaptation, it could be an active response to the adverse environmental conditions for a few local species. (4) Through artificial crosses between different taxa (subgenera, sections and subsections), the inter-specific crossability was obviously relevant to the relationship of phylogenetic development and chromosomal ploidy of parents. This was reflected in the changes of indices of compatibility in different phases of development and was discovered that hybridization was easier between distant subgen. Hymenanthes and subgen. Rhododendron. There were also some cases of compatibility such as the reciprocal crosses between subgen. Hymenanthes and subgen. Tsutsusi, subgen. Tsutsusi and subgen. Rhododendron as well as the unidirectional compatibility between subgen. Tsutsusi and subgen. Pentanthera, subgen. Hymenanthes and subgen. Pentanthera, subgen. Azaleastrum and subgen. Rhododendron. (5) It leads to increases in the fertility and development from bidirectional fertility to unidirectional sterility and then bidirectional sterility in inter-specific cross as SI parents get involved.

Key words: Rhododendron, polyploid, pollination biology, self-fertilization, hybridization, compatibility, fertility

Zhuang Ping. Progress on the fertility of Rhododendron[J]. Biodiv Sci, 2019, 27(3): 327-338.

References 86

1	Akihide O, Kenichi S ( 2004) Cross incompatibility between Rhododendron seat. Tsutsusi species and Rhododendron japonicum (A. Gray) T. V. Suringar f. flavum Nakai. Journal of the Japanese Society for Horticultural Science, 73, 453-459. DOI URL
2	Akihide O, Hiroshi I, Kenichi S ( 2006) Variation in crossability among Rhododendron japonicum f. flavum plants as pollen parents when crossed with evergreen species, R. eriocarpum. Journal of the Japanese Society for Horticultural Science, 75, 270-272. DOI URL
3	Akihide O, Kenichi S ( 2006) Crossability of Kurume Azaleas as a seed parent for hybridizing with Rhododendron japonicum (A. Gray) J. V. Suringar f. flavum Nakai. Journal of the Japanese Society for Horticultural Science, 75, 191-198. DOI URL
4	Akiko O, Ikumi D, Takashi S ( 2008) Bumblebee pollination and reproductive biology of Rhododendron semibarbatum (Ericaceae). Journal of Plant Research, 121, 319-327. DOI URL PMID
5	Akira SH ( 2010) Kinship between parents reduces offspring fitness in a natural population of Rhododendron brachycarpum. Annals of Botany, 105, 637-646. DOI URL PMID
6	Ammal EK ( 1950) Polyploidy in the genus Rhododendron. The Rhododendron Year Book, 5, 92-96.
7	Ammal EK, Enoch IC, Bridgwater M ( 1950) Chromosome numbers in species of Rhododendron. The Rhododendron Year Book, 5, 78-91.
8	Brown GK, Craven LA, Udovicic F, Ladiges PY ( 2006) Phylogeny of Rhododendron section Vireya (Ericaceae) base on two non-coding regions of cpDNA. Plant Systematics and Evolution, 257, 57-93. DOI URL
9	Chamberlain DF, Hyam R, Argent G, Fairweather G, Walter KS ( 1996) The Genus Rhododendron, Its Classification and Synonymy. Royal Botanic Garden Edinburgh, Edinburgh.
10	Escaravage N, Wagner J ( 2004) Pollination effectiveness and pollen dispersal in a Rhododendron ferrugineum (Ericaceae) population. Plant Biology, 6, 606-615. DOI URL PMID
11	Fang MY, Fang RZ, He MY, Hu LZ, Yang HB ( 2005) Rhododendron. In: Flora of China (eds Wu ZY, Raven PH, Hong DY), Vol. 14, pp. 83-87. Science Press, Beijing & Missouri Botanical Garden Press, St. Louis.
12	Fang RZ, Min TL ( 1981) The influence of uplift of Himalayas on the floristic formation of genus Rhododendron. Acta Botanica Yunnanica, 3, 147-157. (in Chinese with English abstract)
	[ 方瑞征, 闵天禄 ( 1981) 喜玛拉雅山脉的隆升对杜鹃属区系形成的影响. 云南植物研究, 3, 147-157.]
13	Fang RZ, Min TL ( 1995) The floristic study on the genus Rhododendron. Acta Botanica Yunnanica, 17, 359-379. (in Chinese with English abstract)
	[ 方瑞征, 闵天禄 ( 1995) 杜鹃属植物区系的研究. 云南植物研究, 17, 359-379.]
14	Gaku K ( 1993) Relationships between flowering time and fruit set of the entomophilous alpine shrub, Rhododendron aureum (Ericaceae), inhabiting snow patches. American Journal of Botany, 80, 1300-1304. DOI URL
15	Gaku K, Akira SH, Yuka K ( 2011) Pollination efficiency of bumblebee queens and workers in the alpine shrub Rhododendron aureum. International Journal of Plant Sciences, 172, 70-77.
16	Gao LM, Zhang CQ, Li DZ, Wu D ( 2005) Chromosome numbers of Rhododendron subgen. Azaleastrum. Acta Botanica Yunnanica, 27, 433-436. (in Chinese with English abstract) DOI URL
	[ 高连明, 张长芹, 李德铢, 吴丁 ( 2005) 杜鹃花属马银花亚属一些种类染色体数目报道. 云南植物研究, 27, 433-436.] DOI URL
17	Geng XM, Zhao HJ, Wu YQ, Zhang YM ( 2017) Cross- compatibility of wild Rhododendron and the effective evaluation indicators. Guihaia, 37, 979-988. (in Chinese with English abstract) DOI URL
	[ 耿兴敏, 赵红娟, 吴影倩, 张月苗 ( 2017) 野生杜鹃杂交亲和性及适宜的评价指标. 广西植物, 37, 979-988.] DOI URL
18	Gillian KB, Lyn AC, Frank U, Pauline YL ( 2006) Phylogenetic relationship of Rhododendron section Vireya (Ericaceae) interred from the ITS nrDNA region. Australian Systematic Botany, 19, 329-342. DOI URL
19	Goetsch L, Eckert AJ, Hall BD ( 2005) The molecular systematics of Rhododendron (Ericaceae): A phylogeny based upon RPB2 gene sequences. Systematic Botany, 30, 616-626. DOI URL
20	Griffin CAM, Eckert CG ( 2003) Experimental analysis of biparental inbreeding in a self-fertilizing plant. Evolution, 57, 1513-1519. DOI URL PMID
21	Hirao AS, Kameyama Y, Ohara M, Isagi Y, Kudo G ( 2006) Seasonal changes in pollinator activities influence pollen dispersal and seed production of the alpine shrub Rhododendron aureum (Ericaceae). Molecular Ecology, 15, 1165-1173. DOI URL PMID
22	Huang CC, Hung KH, Hwang CC ( 2011) Genetic population structure of the alpine species Rhododendron pseudochrysanthum, sensu lato (Ericaceae) inferred from chloroplast and nuclear DNA. BMC Evolutionary Biology, 11, 108-124. DOI URL PMID
23	Huang ZH, Song YP, Huang SQ ( 2017) Evidence for passerine bird pollination in Rhododendron species. AoB Plant, 9, 1-10. DOI URL PMID
24	Jose AM, Juan A, Fernando O ( 2002) Reproductive ecology of Rhododendron ponticum (Ericaceae) in relict Mediterranean populations. Botanical Journal of the Linnean Society, 140, 297-311. DOI URL
25	Kaori S, Ozaki Y, Ureshino K, Miyajima I, Wakana A, Okubo H ( 2008) Interploid crossing overcomes plastome-nuclear genome incompatibility in intersubgeneric hybridization between evergreen and deciduous azaleas. Scientia Horticulturae, 115, 268-274. DOI URL
26	Karlsson PS, Jacobson A ( 2001) Onset of reproduction in Rhododendron lapponicum shoots: The effect of shoot size, age, and nutrient status at two subarctic sites. Oikos, 94, 279-286. DOI URL
27	Kehr AE ( 1977) Azaleodendron breeding. Journal of American Rhododendron Society, 31, 226-232.
28	Kenji U, Miyoko K, Ikuo M ( 2000) Factors of intersectional unilateral cross incompatibility between several evergreen azalea species and Rhododendron japonicum f. flavum. Journal of the Japanese Society for Horticultural Science, 69, 261-265. DOI URL PMID
29	Kenji U, Yoshiko T, Yuka T, Takeru Ii, Ikue M, Masaru A ( 2006) Cross compatibility of intersubgeneric hybrids of azaleas on backcross with several evergreen species. Journal of the Japanese Society for Horticultural Science, 75, 403-409. DOI URL
30	Koichi K, Yuji K, Tomohisa Y, Shigeo N, Takashi H ( 2005) Plastid inheritance and plastome-genome incompatibility of intergeneric hybrids between Menziesia and Rhododendron. Journal of the Japanese Society for Horticultural Science, 74, 318-323. DOI URL
31	Kurashige Y, Etoh JI, Handa T, Takayamagi K, Yukawa T ( 2001) Section relationships in genus Rhododendron (Ericaceae): Evidence from matK and trnK intron sequences. Plant Systematic Evolution, 228, 1-14. DOI URL
32	Lan X, Zhang LH, Zhang JZ, Cui HX, Jiang CD, Shi L ( 2012) Research progress of Rhododendron breeding. Acta Horticulturae Sinica, 39, 1829-1838. (in Chinese with English abstract)
	[ 兰熙, 张乐华, 张金政, 崔红霞, 姜闯道, 石雷 ( 2012) 杜鹃花育种研究进展. 园艺学报, 39, 1829-1838.]
33	Levins R ( 1970) Extinction. In: Some Mathematical problems in Biology (ed. Gerstenhaber M), pp. 77-107. American Mathematical Society Rhode Island, Providence.
34	Li SH, Sun WB, Ma YP ( 2018) Current conservation status and reproductive biology of the giant tree Rhododendron in China. Nordic Journal of Botany, doi: 10.1111/njb.01999.
35	Li XS, Ba CY, Cao HN, Zong CG, Qu L, Zhang JZ ( 2015) Interspecific cross compatibility of Rhododendron in Changbai Mountain. Agricultural Science & Techno, 16, 1617-1620.
36	Liu DF, Xue YB ( 1997) Plant self-incompatibility. In: Genetics of Plant Reproduction (ed. Meng JL), pp. 214-277. Science Press, Beijing. (in Chinese)
	[ 刘定富, 薛永彪 ( 1997) 植物自交不亲和性, 214-277页. 见: 植物生殖遗传学(孟金陵主编). 科学出版社, 北京.]
37	Liu XQ, Su JL, Li C, Liu XH ( 2010) Study on the fruitfulness of hybridization, selfing and open pollination of Rhododendron. Acta Agriculture Shanghai, 26, 145-148. (in Chinese with English abstract) DOI URL
	[ 刘晓青, 苏家乐, 李畅, 刘晓宏 ( 2010) 杜鹃花自交、杂交及开放授粉结实性研究. 上海农业学报, 26, 145-148.] DOI URL
38	Liu YF, Xing M, Zhao W, Fan RY, Luo S, Chen X ( 2012) Genetic diversity analysis of Rhododendron aureum Georgi (Ericaceae) located on Changbai Mountain using ISSR and RAPD markers. Plant Systematic Evolution, 298, 921-930. DOI URL
39	Ma YP, Zhang CQ, Zhang JL, Yang YB ( 2010) Natural hybridization between Rhododendron delavayi and R. cyanocarpum (Ericaceae), from morphological, molecular and reproductive evidence. Journal of Integrative Plant Biology, 52, 844-851. DOI URL PMID
40	Ma YP, Xie WJ, Sun WB, Marczewski T ( 2016) Strong reproductive isolation despite occasional hybridization between a widely distributed and a narrow endemic Rhododendron species. Scientific Reports, 6, 19146. DOI URL PMID
41	Meng JL ( 1997) Genetics of Plant Reproduction, pp. 296-357. Science Press, Beijing. (in Chinese)
	[ 孟金陵 ( 1997) 植物生殖遗传学, 296-357页. 科学出版社, 北京.]
42	Milne RI, Terzioglu S, Abbott RJ ( 2003) A hybrid zone dominated by fertile F₁s: Maintenance of species barriers in Rhododendron. Molecular Ecology, 12, 2719-2729. DOI URL PMID
43	Milne RI, Davies C, Prickett R, Inns LH ( 2010) Phylogeny of Rhododendron subgenus Hymenanthes based on chloroplast DNA markers: Between-lineage hybridisation during adaptive radiation? Plant Systematic Evolution, 285, 233-244. DOI URL
44	Min TL, Fang RZ ( 1979) On the origin and geographic distribution of genus Rhododendron L. Acta Botanica Yunnanica, 1, 121-127. (in Chinese with English abstract)
	[ 闵天禄, 方瑞征 ( 1979) 杜鹃属Rhododendron L.的地理分布及起源问题的探讨. 云南植物研究, 1, 121-127.]
45	Min TL, Fang RZ ( 1990) The phylogeny and evolution of genus Rhododendron. Acta Botanica Yunnanica, 12, 353-365. (in Chinese with English abstract)
	[ 闵天禄, 方瑞征 ( 1990) 杜鹃属的系统发育与进化. 云南植物研究, 12, 353-365.]
46	Nathannel TW, Erin ED, Joseph BF, Stefan HG, David AM, Justin GS, Timothy MS, Sarah LR, Andrew GZ ( 2006) Pollinator limitation, autogamy and minimal inbreeding depression in insect-pollinated plants on a boreal island. American Midland Naturalist, 155, 19-38. DOI URL
47	Ng SC, Corlett RT ( 2000) Comparative reproductive biology of the six species of Rhododendron (Ericaceae) in Hong Kong, South China. Canadian Journal of Botany, 78, 221-229. DOI URL
48	Nobuo K, Daiki M, Akira N, Masaru A ( 2008) Attaining inter-subgeneric hybrids in fragrant azalea breeding and the inheritance of organelle DNA. Euphytica, 159, 67-72. DOI URL
49	Oetsch LG, Eckert AJ, Hall BD ( 2005) The molecular systematics of Rhododendron (Ericaceae): A phylogeny based upon RPB2 gene sequences. Systematic Botany, 30, 616-626. DOI URL
50	Palser BF, Rouse JL and Williams EG ( 1989) Coordinated timetables for megagametophyte development and pollen tube growth in Rhododendron nuttallii from anthesis to early postfertilization. American Journal of Botany, 76, 1167-1202. DOI URL
51	Pierce L ( 1974) An unusual intergeneric cross. Journal of American Rhododendron Society, 28, 45-50.
52	Pornon A, Escaravage N, Boche TB ( 1997) Variation of reproductive traits in Rhododendron ferrugineum L. (Ericaceae) population along a successional gradient. Plant Ecology, 130, 1-11. DOI URL
53	Richard JA, Juliet KJ, Richard IM, Amanda CM ( 2003) Plant introduction, hybridization and gene flow. Philosophical Transactions of the Royal Society B: Biological Sciences, 358, 1123-1132. DOI URL
54	Rouse JL, Knox RB, Williams EG ( 1993) Inter- and intraspecific pollinations involving Rhododendron species. Journal of American Rhododendron Society, 47, 23-28.
55	Ruth A, Kwiton J, George A ( 2000) Chromosome numbers of some tropical Rhdodendrons (Section Vireya). Edinburgh Journal of Botany, 57, 1-7. DOI URL
56	Sax K ( 1930) Chromosome stability in the genus Rhododendron. American Journal of Botany, 17, 247-251. DOI URL
57	Schepper SD, Leus L, Mertens M, Bockstaele EV, Loose MD, Debergh P, Heursel J ( 2001) Flow cytometric analysis of ploidy in Rhododendron (subgenus Tsutsusi). Hortscience, 36, 125-127. DOI URL
58	Shrestha, N, Wang ZH, Su XY, Xu XT, Lyu L, Liu YP, Dimitrov D, Kennedy JD, Wang QG, Tang ZY, Feng XJ ( 2018) Global patterns of Rhododendron diversity: The role of evolutionary time and diversification rates. Global Ecology and Biogeography, 27, 913-924. DOI URL
59	Song YP, Huang ZH, Huang SQ ( 2019) Pollen aggregation by viscin threads in Rhododendron varies with pollinator. New Phytologist, 221, 1150-1159. DOI URL
60	Stout JC, Parnell JA, Arroyo J, Crowe TP ( 2006) Pollination ecology and seed production of Rhododendron ponticum in native and exotic habitats. Biodiversity and Conservation, 15, 755-777. DOI URL
61	Tagane S, Hiramatsu M, Okubo H ( 2008) Hybridization and asymmetric introgression between Rhododendron eriocarpum and R. indicum on Yakushima Island, southwest Japan. Journal of Plant Research, 121, 387-395. DOI URL PMID
62	Tom E, Ellen DK, Johan VH, Jan DR, Erik VB ( 2007) Application of embryo rescue after interspecific crosses in the genus Rhododendron. Plant Cell, Tissue and Organ Culture, 89, 29-35. DOI URL
63	Wang DY, Liu YJ, Bai YQ, Xie LJ ( 2012) The breeding research progress of Rhododendron plants. Journal of Anhui Agriculture Science, 40, 15622-15625, 15627. (in Chinese with English abstract)
	[ 王定跃, 刘永金, 白宇清, 谢利娟 ( 2012) 杜鹃花属植物育种研究进展. 安徽农业科学, 40, 15622-15625, 15627.]
64	Williams EG, Rouse JL ( 1988) Lengths contribute to isolation of species in Rhododendron. Australian Journal of Botany, 36, 183-191. DOI URL
65	Williams EG, Rouse JL, Palser BF, Knox RB ( 1990) Reproductive biology of rhododendron. Horticultural Reviews, 12, 1-67.
66	Wolf PG, Doche B, Gielly L, Taberlet P ( 2004) Genetic structure of Rhododendron ferrugineum at a wide range of spatial scale. Journal of Heredity, 95, 301-308. DOI URL PMID
67	Wu H, Yang XM, Shao HM, Wang F ( 2013) Germplasm resource base for rhododendron horticulture: Status, problems and countermeasures. Biodiversity Science, 21, 628-634. (in Chinese with English abstract) DOI URL
	[ 吴荭, 杨雪梅, 邵慧敏, 王飞 ( 2013) 杜鹃花产业的种质资源基础: 现状、问题与对策. 生物多样性, 21, 628-634.] DOI URL
68	Yan LJ, Burgess KS, Milne R, Fu CN, Li DZ, Gao LM ( 2017) Asymmetrical natural hybridization varies among hybrid swarms between two diploid Rhododendron species. Annals of Botany, 120, 51-61. DOI URL PMID
69	Yan LJ, Burgess KS, Zheng W, Tao ZB, Li DZ, Gao LM ( 2018) Incomplete reproductive isolation between Rhododendron taxa enables hybrid formation and persistence. Journal of Integrative Plant Biology, 61, 433-448.
70	Yu SX ( 1992) Rhododendron, pp. 100-113. Jindun Press, Beijing. (in Chinese)
	[ 余树勋 ( 1992) 杜鹃花, 100-113页. 金盾出版社, 北京.]
71	Zha HG, Milne RI, Sun H ( 2010) Asymmetric hybridization in Rhododendron agastum: A hybrid taxon comprising mainly F₁s in Yunnan, China. Annals of Botany, 105, 89-100. DOI URL PMID
72	Zhang CQ, Feng BJ, Lü YL ( 1998) Hybridization study of the genus Rhododendron. Acta Botanica Yunnanica, 20, 94-96. (in Chinese with English abstract)
	[ 张长芹, 冯宝钧, 吕元林 ( 1998) 杜鹃花属植物的杂交研究. 云南植物研究, 20, 94-96.]
73	Zhang CQ, Luo JF, Feng BJ ( 2002) New rhododendron hybrid-‘Zhaohui’and ‘Hongyun’. Acta Horticulturae Sinica, 29, 296. (in Chinese with English abstract) DOI URL
	[ 张长芹, 罗吉凤, 冯宝均 ( 2002) 杜鹃花新品种‘朝晖’和‘红晕’. 园艺学报, 29, 296.] DOI URL
74	Zhang JL, Zhang CQ, Wu ZQ, Qiao Q ( 2007) The potential roles of interspecific pollination in natural hybridization of Rhododendron species in Yunnan, China. Biodiversity Science, 15, 658-665. (in Chinese with English abstract) DOI URL
	[ 张敬丽, 张长芹, 吴之坤, 乔琴 ( 2007) 探讨种间传粉在杜鹃花属自然杂交物种形成中的作用. 生物多样性, 15, 658-665.] DOI URL
75	Zhang JL, Zhang CQ, Gao LM, Yang JB, Li HT ( 2007) Natural hybridization origin of Rhododendron agastum (Ericaceae) in Yunnan, China: Inferred from morphological and molecular evidence. Journal of Plant Research, 120, 457-463. DOI URL PMID
76	Zheng SL, Yi CR, Liu Q, Zhang JL ( 2016) Primary study on hybridization breeding among several Rhododendron species in Yunnan Province. Journal of Yunnan Agricultural University (Natural Science), 31, 1052-1057. (in Chinese with English abstract)
	[ 郑硕理, 易陈燃, 刘巧, 张敬丽 ( 2016) 云南几种杜鹃杂交育种初探. 云南农业大学学报(自然科学版), 31, 1052-1057.]
77	Zhuang P ( 2012) Discussion on the Rhododendron geographical distribution types and their cause of formation in China. Guihaia, 32, 150-156. (in Chinese with English abstract) DOI URL
	[ 庄平 ( 2012) 中国杜鹃花属植物地理分布型及其成因的探讨. 广西植物, 32, 150-156.] DOI URL
78	Zhuang P, Wang F, Shao HM ( 2013) Comparative study on Rhododendron and their distribution in W-Sichuan and SE-Tibet. Guihaia, 33, 791-797. (in Chinese with English abstract) DOI URL
	[ 庄平, 王飞, 邵慧敏 ( 2013) 川西与藏东南地区杜鹃花属植物及其分布的比较研究. 广西植物, 33, 791-797.] DOI URL
79	Zhuang P ( 2017 a) Natural pollination of 37 Rhododendron species under ex situ conservation. Guihaia, 37, 947-958. (in Chinese with English abstract) DOI URL
	[ 庄平 ( 2017 a) 37种杜鹃花属植物在迁地保育下的自然授粉研究. 广西植物, 37, 947-958.] DOI URL
80	Zhuang P ( 2017 b) Self-fertilization of 32 Rhododendron species under ex situ conservation. Guihaia, 37, 959-968. (in Chinese with English abstract) DOI URL
	[ 庄平 ( 2017 b) 32种杜鹃花属植物在迁地保育条件下的自交研究. 广西植物, 37, 959-968.] DOI URL
81	Zhuang P ( 2018 a) Cross fertility of intra-subgen. Hymenanthes of 23 Rhododendron species. Guihaia, 38, 1545-1557. (in Chinese with English abstract)
	[ 庄平 ( 2018 a) 23种常绿杜鹃亚属植物种间杂交的可育性研究. 广西植物, 38, 1545-1557.]
82	Zhuang P ( 2018 b) Cross fertility of intra-subgen. Rhododendron of 10 Rhododendron species. Guihaia, 38, 1558-1565. (in Chinese with English abstract)
	[ 庄平 ( 2018 b) 10种杜鹃亚属植物种间杂交的可育性研究. 广西植物, 38, 1558-1565.]
83	Zhuang P ( 2018 c) Cross fertility of inter-subgenera of 32 Rhododendron species. Guihaia, 38, 1566-1580. (in Chinese with English abstract)
	[ 庄平 ( 2018 c) 32种杜鹃花属植物亚属间杂交的可育性研究. 广西植物, 38, 1566-1580.]
84	Zhuang P ( 2018 d) Distribution of hybrid incompatibility and sterility of Rhododendron. Guihaia. 38, 1581-1587. (in Chinese with English abstract)
	[ 庄平 ( 2018 d) 杜鹃花属植物杂交不亲和与败育分布研究. 广西植物, 38, 1581-1587.]
85	Zhuang P ( 2018 e) Crossability and its characteristics of Rhododendron. Guihaia. 38, 1588-1594. (in Chinese with English abstract)
	[ 庄平 ( 2018 e) 杜鹃花属植物种间可交配性及其特点. 广西植物, 38, 1588-1594.]
86	Zhuang P ( 2019) Preliminary study on the direction of inter-specific cross of Rhododendron. Guihaia, doi: 10.11931/guihaia.gxzw20183003. (in Chinese with English abstract)
	[ 庄平 ( 2019) 杜鹃花属植物种间杂交向性的初步研究. 广西植物, doi: 10.11931/guihaia.gxzw20183003.]

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[11]	Daike Tian, Chun Li, Yan Xiao, Naifeng Fu, Yi Tong, Ruijuan Wu. Occurrence and characteristics of natural hybridization in Begonia in China [J]. Biodiv Sci, 2017, 25(6): 654-674.
[12]	Shuoli Zheng, Xiaoling Tian, Chengling Huang, Lingjun Wang, Yuan Feng, Jingli Zhang. Molecular and morphological evidence for natural hybridization between Rhododendron decorum and R. delavayi (Ericaceae) [J]. Biodiv Sci, 2017, 25(6): 627-637.
[13]	Yanfen Chang. Polyploidy and the formation of species diversity in Aspleniaceae [J]. Biodiv Sci, 2017, 25(6): 621-626.
[14]	Yukun Wei, Yanbo Huang, Guibin Li. Reproductive isolation in sympatric Salvia species sharing a sole pollinator [J]. Biodiv Sci, 2017, 25(6): 608-614.
[15]	Yanping Xie, Jianli Zhao, Xingfu Zhu, Li Li, Qingjun Li. Asymmetric hybridization of Primula secundiflora and P. poissonii in three sympatric populations [J]. Biodiv Sci, 2017, 25(6): 647-653.