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Haiyan Xu, Folian Li, Yuezhi Pan, and Xun Gong

Yanzhizui as exceptions, which employed M. calcicola as paternal and M. crassipes as maternal parent ( Han et al., 2014 ). In addition, previous interspecific hybridization studies within Michelia also reported that incompatibility existed between the

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Charles R. Brown

progenies coming from the fruit of an ‘Early Rose’ plant reinforced his philosophy about revealing genetic variation. The variation accumulated over many generations of sexual reproduction was hidden only to be unfettered by hybridization. “We have observed

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Qin Yang and Yan Fu

ages, a large number of innovative germplasms and new varieties of fruit trees have been created using conventional breeding methods, such as sexual hybridization and seedling selection, and this diversity plays an important role in the sustainable

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Bruce L. Dunn and Jon T. Lindstrom

, as in the case of T . parishii and T . lanatum populations, as well as T . ruygtii and T . lanceolatum . No intermediate hybrids have been reported for sect. Trichostema from field observations, even though interspecific hybridization

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Zhan Shu, Xue Zhang, Dianqiong Yu, Sijia Xue, and Hua Wang

Natural hybridization between sympatric forest tree species is common in natural populations; it can influence the genetic diversity within species and promote new species formation ( Arnold, 2006 ; Lexer et al., 2005 ). Loss of diversity from

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Alan T. Whittemore and Alden M. Townsend

potential source of disease-resistance genes for tolerant species. Interspecific hybridization experiments have not been carried out in Celtis . Species of Celtis have often been presumed to hybridize based on patterns of variation observed in wild

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Akira Kitajima, Atsu Yamasaki, Tsuyoshi Habu, Bannarat Preedasuttijit, and Kojiro Hasegawa

detailed karyological analysis. Genomic in situ hybridization (GISH) has become a useful tool for the characterization of genomes and chromosomes in polyploids and somatic hybrids of herbaceous plants ( Raina and Rani, 2003 ), and GISH for identification

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Margaret R. Pooler and Ruth L. Dix

Interspecific hybridizations among members of the genus Hamamelis (the witchhazels) and Corylopsis were carried out in 1993, 1994, 1995, and 1996 at the U.S. National Arboretum. Specifically, crosses involving the native witchhazel (H. vernalis and H. virginiana) and the Asian taxa (H. mollis, H. japonica, and H. × intermedia) were attempted in order to combine the ornamental qualities of the Asian species with the adaptability and fall blooming characteristics of the native species. Additionally, C. platypetala, a hardy species with small inflorescences, was crossed with C. himalaica, which has large showy inflorescences but is less hardy. Approximately 50 seedlings resulting from these crosses have been analyzed using randomly amplified polymorphic DNA (RAPD) markers to verify interspecific hybridization. Based on these assays, we report the first incidence of controlled interspecific hybridization between the Asian and native witchhazel taxa.

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Guangxin Liu, Xiaoling Zhang, Yue Lan, Haoyang Xin, Fengrong Hu, Zhuhua Wu, Jisen Shi, and Mengli Xi

-Aldrich, St. Louis, MO) for 10 min at room temperature. The slides were washed in 2× SSC for 5 min, dehydrated in an ethanol gradient (70%, 95%, 100%), and air-dried. The hybridization mixture consisted of 50% formamide, 10% sodium dextran sulfate, 2× SSC, 0

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Shea A. Keene, Timothy S. Johnson, Cindy L. Sigler, Terah N. Kalk, Paul Genho, and Thomas A. Colquhoun

( Gulia et al., 2009 ). Daylily hybridization began in earnest in the early 20th century, mostly by amateur breeders that focused on increasing the diversity of flower colors, color patterns, and flower forms ( Gulia et al., 2009 ). Today daylilies come in