NDLI: Analysis of Starch Gene Diversity in the Wild Relatives of Oryza sativa

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Analysis of Starch Gene Diversity in the Wild Relatives of Oryza sativa

Content Provider	Springer Nature Link
Author	Kasem, Shabana Waters, Daniel L. E. Henry, Robert J.
Copyright Year	2012
Abstract	Genetic loci influencing traits important to humans have been selected during crop domestication. The starch properties of rice influence the ease of cooking and attractiveness of rice as a human food. Starch biosynthesis genes likely to influence starch properties in the grain were compared in wild and domesticated rice genotypes. Sequence variation was investigated in starch biosynthesis gene exons that have been reported to have a direct influence on rice amylose content, gelatinization temperature, and amylopectin chain length. Exons 6 and 10 of GBSSI, exon 8 of SSIIa and exons 11, 13, 14 and 16 of SBEIIb were amplified and sequenced from 13 wild Oryza species encompassing genome types AA to HHJJ. Thirty two single nucleotide polymorphisms (SNPs) were identified in the exons of GBSSI; 176 in exon 8 of SSIIa, and 43 in SBEIIb, giving a total of 251 SNPs among the species. Eighty six of these SNP caused changes in the encoded amino acid, of which 28 were missense mutations that affected highly conserved amino acids within the protein sequence of GBSSI, SSIIa or SBEIIb. Two indels were identified in Potamophila parviflora, a close relative of Zizania palustris, a North American native wild rice. Most of the nucleotide variations and non-conservative changes were observed in the genomes other than the AA genome species. This represents a genetic resource for use in rice starch manipulation. The impact of human selection at these loci can be deduced by comparison of modern cultivated genotypes with their wild progenitors.
Starting Page	286
Ending Page	308
Page Count	23
File Format	PDF
ISSN	19359756
Journal	Tropical Plant Biology
Volume Number	5
Issue Number	4
e-ISSN	19359764
Language	English
Publisher	Springer-Verlag
Publisher Date	2012-10-18
Publisher Place	New York
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Rice Wild rice Oryza sativa Oryza Phylogeny Genome Starch Plant Sciences Plant Genetics & Genomics Plant Breeding/Biotechnology Plant Ecology Transgenics
Content Type	Text
Resource Type	Article
Subject	Genetics Plant Science

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