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Titolo:
Genetics and the conservation and use of Australian wild relatives of crops
Autore:
Brown, AHD; Brubaker, CL;
Indirizzi:
CSIRO, Ctr Plant Biodivers Res, Canberra, ACT 2601, Australia CSIRO Canberra ACT Australia 2601 vers Res, Canberra, ACT 2601, Australia
Titolo Testata:
AUSTRALIAN JOURNAL OF BOTANY
fascicolo: 3, volume: 48, anno: 2000,
pagine: 297 - 303
SICI:
0067-1924(2000)48:3<297:GATCAU>2.0.ZU;2-3
Fonte:
ISI
Lingua:
ENG
Soggetto:
CHLOROPLAST DNA POLYMORPHISM; GLYCINE LEGUMINOSAE; B-GENOME; GOSSYPIUM; GERMPLASM; COMPLEX;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Agriculture,Biology & Environmental Sciences
Citazioni:
31
Recensione:
Indirizzi per estratti:
Indirizzo: Brown, AHD CSIRO, Ctr Plant Biodivers Res, GPO Box 1600, Canberra, ACT 2601, Australia CSIRO GPO Box 1600 Canberra ACT Australia 2601 2601, Australia
Citazione:
A.H.D. Brown e C.L. Brubaker, "Genetics and the conservation and use of Australian wild relatives of crops", AUST J BOT, 48(3), 2000, pp. 297-303

Abstract

Genetical research stands to make crucial contributions to the in situ conservation of wild Australian relatives of crop plants, management of their ex situ germplasm collections, and their use in crop improvement. For instance, population genetic theory is basic in formulating collecting strategies. Results from the neutral allele model indicate that allelic richness in samples from equilibrium populations is, although directly proportional to the population size, proportional to the logarithm of the sample size. Suchtrends underline the importance of dividing the sampling effort among manypopulations. Our empirical genetical studies have been in the Australian wild relatives of soybean and cotton. These species not only contain significant genetic resources for improving their related crops, but also may be at risk from unwanted hybridisation. In perennial Glycine species, previous cytological and genetic research detected major races within the G. tabacina polyploid complex. A maternal phylogeny on the basis of chloroplast restriction-site variation defined plastome lineages and clarified the evolutionof the polyploid complexes. Ongoing research with nuclear sequences focuses on the relationship between chloroplast and nuclear phylogenies and morphology. In Gossypium, estimates of interspecific hybrid fertility and outcrossing rates in natural populations near current cotton crops point to negligible risk of transgene escape from genetically engineered commercial cotton cultivars.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 24/10/20 alle ore 14:45:33