Document Detail

Genetic and genotype x environment interaction effects for the content of seven essential amino acids in indica rice.
MedLine Citation:
PMID:  15536256     Owner:  NLM     Status:  MEDLINE    
It is necessary for rice breeders to understand the genetic basis of nutrient quality traits of rice. Essential amino acids are most important in determining the nutrient quality of rice grain and can affect the health of people who depend on rice as a staple food. In view of the paucity of genetic information available on essential amino acids in indica rice, we estimated the genetic main effects and genotype x environment (G x E) interaction effects on the content of essential amino acids. Nine cytoplasmic male sterile lines as females and five restorer lines as males were introduced in a North Carolina II design across environments. Estimates of the content of the essential amino acids valine, methionine, leucine and phenylalanine showed that they were mainly controlled by genetic main effects, while the contents of threonine, cysteine and isoleucine were mainly affected by G x E effects. In the case of genetic main effects, both cytoplasmic and maternal genetic effects were predominant for all essential amino acids, indicating that selection for improving essential amino acid content based on maternal performance would be more effective than that based on seeds. The total narrow-sense heritabilities were high and ranged from 0.72 to 0.83. Since general heritabilities for these essential amino acids (except for cysteine) were found to be much larger than G x E interaction heritability, the improvement of content of most essential amino acids under selection would be expected under various environments. Rice varieties such as Zhenan 3, Yinchao 1, T49, 26715, 102 and 1391 should be selected as optimal parents for increasing the content of most essential amino acids, while the total genetic effects from Zhexie 2, Xieqingzao, Gangchao 1, V20, Zuo 5 and Zhenshan 97 were mainly negative and these parents could decrease the contents of most essential amino acids.
J G Wu; C H Shi; X M Zhang; T Katsura
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Journal of genetics     Volume:  83     ISSN:  0022-1333     ISO Abbreviation:  J. Genet.     Publication Date:  2004 Aug 
Date Detail:
Created Date:  2004-11-10     Completed Date:  2004-12-10     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  2985113R     Medline TA:  J Genet     Country:  India    
Other Details:
Languages:  eng     Pagination:  171-8     Citation Subset:  IM    
Agronomy Department, College of Agriculture and Biotechnology, Zhejiang University, Hangzhou 310029, People's Republic of China.
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MeSH Terms
Amino Acids / analysis*
Oryza sativa / chemistry*,  genetics*
Reg. No./Substance:
0/Amino Acids

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