Background and Aims Weedy rice (Oryza sativa f. spontanea) is one of the most notorious weeds occurring in rice-planting areas worldwide. The objectives of this study are to determine the genetic diversity and differentiation of weedy rice populations from Liaoning Province in North-eastern China and to explore the possible origin of these weedy populations by comparing their genetic relationships with rice varieties (O. sativa) and wild rice (O. rufipogon) from different sources. Methods Simple sequence repeat (SSR) markers were used to estimate the genetic diversity of 30 weedy rice populations from Liaoning, each containing about 30 individuals, selected rice varieties and wild O. rufipogon. Genetic differentiation and the relationships of weedy rice populations were analysed using cluster analysis (UPGMA) and principle component analysis (PCA). Key Results The overall genetic diversity of weedy rice populations from Liaoning was relatively high (He = 0 313, I = 0 572), with about 35%of the genetic variation found among regions. The Liaoning weedy rice populations were closely related to rice varieties from Liaoning and japonica varieties from other regions but distantly related to indica rice varieties and wild O. rufipogon. Conclusions Weedy rice populations from Liaoning are considerably variable genetically and most probably originated from Liaoning rice varieties by mutation and intervarietal hybrids. Recent changes in farming practices and cultivation methods along with less weed management may have promoted the re-emergence and divergence of weedy rice in North-eastern China.

Genetic diversity and origin of weedy rice (Oryza sativa f. spontanea) population found in north-eastern China reveled by simple sequence repeat (SSR) markers / Q. Cao, B.R. Lu, H. Xia, J. Rong, F. Sala, A. Spada, F. Grassi. - In: ANNALS OF BOTANY. - ISSN 0305-7364. - 98:6(2006 Dec), pp. 1241-1252. [10.1093/aob/mc1210]

Genetic diversity and origin of weedy rice (Oryza sativa f. spontanea) population found in north-eastern China reveled by simple sequence repeat (SSR) markers

A. Spada
Penultimo
;
2006

Abstract

Background and Aims Weedy rice (Oryza sativa f. spontanea) is one of the most notorious weeds occurring in rice-planting areas worldwide. The objectives of this study are to determine the genetic diversity and differentiation of weedy rice populations from Liaoning Province in North-eastern China and to explore the possible origin of these weedy populations by comparing their genetic relationships with rice varieties (O. sativa) and wild rice (O. rufipogon) from different sources. Methods Simple sequence repeat (SSR) markers were used to estimate the genetic diversity of 30 weedy rice populations from Liaoning, each containing about 30 individuals, selected rice varieties and wild O. rufipogon. Genetic differentiation and the relationships of weedy rice populations were analysed using cluster analysis (UPGMA) and principle component analysis (PCA). Key Results The overall genetic diversity of weedy rice populations from Liaoning was relatively high (He = 0 313, I = 0 572), with about 35%of the genetic variation found among regions. The Liaoning weedy rice populations were closely related to rice varieties from Liaoning and japonica varieties from other regions but distantly related to indica rice varieties and wild O. rufipogon. Conclusions Weedy rice populations from Liaoning are considerably variable genetically and most probably originated from Liaoning rice varieties by mutation and intervarietal hybrids. Recent changes in farming practices and cultivation methods along with less weed management may have promoted the re-emergence and divergence of weedy rice in North-eastern China.
Oryza sativa, O. spontanea, O. rufipogon, weedy rice, molecular markers, simple sequence repeat (SSR), genetic diversity, differentiation, origin
Settore BIO/01 - Botanica Generale
dic-2006
20-ott-2006
Article (author)
File in questo prodotto:
File Dimensione Formato  
mcl210.pdf

accesso riservato

Tipologia: Publisher's version/PDF
Dimensione 197.78 kB
Formato Adobe PDF
197.78 kB Adobe PDF   Visualizza/Apri   Richiedi una copia
Pubblicazioni consigliate

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/2434/1002391
Citazioni
  • ???jsp.display-item.citation.pmc??? 36
  • Scopus 159
  • ???jsp.display-item.citation.isi??? 144
social impact