GENETIC DIVERSITY AND ECOGEOGRAPHICAL DIFFERENTIATION AMONG RIBOSOMAL DNA ALLELES IN WILD AND CULTIVATED BARLEY

被引:63
|
作者
MAROOF, MAS [1 ]
ALLARD, RW [1 ]
ZHANG, QF [1 ]
机构
[1] UNIV CALIF DAVIS,DEPT GENET,DAVIS,CA 95616
关键词
adaptedness; Mendelian ribosomal DNA loci; restriction fragment length variants; selection;
D O I
10.1073/pnas.87.21.8486
中图分类号
O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];
学科分类号
07 ; 0710 ; 09 ;
摘要
DNA from 267 accessions of wild barley from ecologically diverse habitats in Israel and Iran and from 92 accessions of cultivated barley from throughout the world were assayed for the 20 ribosomal DNA (rDNA) spacer-length variants that have been identified in the barley species. These 20 spacer-length variants, which are detectable by Southern blot hybridization, serve as markers of rDNA alleles of two Mendelian loci, Rrn1 and Rrn2. All of the populations of wild barley studied were polymorphic for both loci. In wild barley allele 112 (Rrn1) and allele 107 (Rrn2) behaved as widely adapted wild-type alleles; in our sample of cultivated barley allele 112 also behaved as a wild-type allele but allele 104 was somewhat more frequent than allele 107 in Rrn2. A few other alleles were locally frequent in wild barley. However, most of the 20 alleles were infrequent or rare and such alleles were often associated as 'hitchhikers' with one of the wild-type alleles in compound two-component alleles. Allelic and genotypic frequencies differed widely in different habitats in correlation with eight of nine factors of the physical environment. Discrete log-linear multivariate analyses revealed statistically significant associations among alleles of Rrn1 and Rrn2. It was concluded that natural selection acting differentially on various rDNA alleles plays a major role in the development and maintenance of observed patterns of molecular and genetic organization of rDNA variability.
引用
收藏
页码:8486 / 8490
页数:5
相关论文
共 50 条
  • [21] Genetic diversity among cultivated and wild germplasm of cucumber based on RAPD analysis
    Choudhary, H.
    Singh, D. K.
    Marla, S. S.
    Chauhan, V. B. S.
    INDIAN JOURNAL OF HORTICULTURE, 2011, 68 (02) : 197 - 200
  • [22] HIGH GENETIC DIVERSITY AND STRUCTURAL DIFFERENTIATION IN FRAGMENTED POPULATIONS OF WILD BARLEY (HORDEUM BREVISUBULATUM)
    Guo, Wanli
    Hussain, Nazim
    Jabeen, Zahra
    Wu, Rui
    Wang, Jiang
    Liu, Bao
    PAKISTAN JOURNAL OF BOTANY, 2016, 48 (06) : 2439 - 2451
  • [23] Genetic diversity for drought resistance in wild emmer wheat and its ecogeographical associations
    Peleg, Z
    Fahima, T
    Abbo, S
    Krugman, T
    Nevo, E
    Yakir, D
    Saranga, Y
    PLANT CELL AND ENVIRONMENT, 2005, 28 (02): : 176 - 191
  • [24] GENETIC DIVERSITY IN THE WILD PROGENITOR OF BARLEY IN ISRAEL
    NEVO, E
    BROWN, AHD
    ZOHARY, D
    EXPERIENTIA, 1979, 35 (08): : 1027 - 1029
  • [25] Genetic Diversity Based on Allozyme Alleles of Chinese Cultivated Rice
    D S Brar
    G S Khush
    Agricultural Sciences in China, 2007, (06) : 641 - 646
  • [26] Genetic variation at flowering time loci in wild and cultivated barley
    Cockram, James
    Hones, Huw
    O'Sullivan, Donal M.
    PLANT GENETIC RESOURCES-CHARACTERIZATION AND UTILIZATION, 2011, 9 (02): : 264 - 267
  • [27] Taxonomy and Genetic Differentiation among Wild and Cultivated Germplasm of Solanum sect. Petota
    Hardigan, Michael A.
    Bamberg, John
    Buell, C. Robin
    Douches, David S.
    PLANT GENOME, 2015, 8 (01):
  • [28] Genetic diversity and relationships among wild and cultivated Stenocereus queretaroensis populations in western Mexico
    Ruan-Tejeda, Irma
    Santerre, Anne
    Martin Huerta-Martinez, Francisco
    Ignacio Iniguez-Davalos, Luis
    Castro-Felix, Patricia
    BIOCHEMICAL SYSTEMATICS AND ECOLOGY, 2014, 55 : 125 - 130
  • [29] Genetic diversity and relationships of wild and cultivated olives in Turkey
    Berna Yoruk
    Vatan Taskin
    Plant Systematics and Evolution, 2014, 300 : 1247 - 1258
  • [30] Genetic diversity and relationships of wild and cultivated olives in Turkey
    Yoruk, Berna
    Taskin, Vatan
    PLANT SYSTEMATICS AND EVOLUTION, 2014, 300 (05) : 1247 - 1258