The agronomic traits, physiological characteristics and yield traits of 9 @entity579 varieties popularized in lower reaches of Yangtze River were investigated under submergence stress at the tillering stage. The differences of environmental adaptability to submergence stress for conventional @entity27267 , indica hybrid @entity579 and hybrid @entity27267 , were also analyzed and compared. The results showed that the stem and the upper three leaves under submergence stress were elongated compared with the control. And the elongation of the different varieties was shown as, hybrid @entity27267 > indica hybrid @entity579 > conventional @entity27267 . As to the numbers of tillers and green leaves, and the aboveground dry mass, the reduction of indica hybrid @entity579 was all between hybrid @entity27267 and conventional @entity27267 . The damage of hybrid japonica was the lightest. The content of @entity1865 in the leaves of conventional @entity27267 increased, while the activities of SOD and CAT decreased. However, the performances of hybrid @entity27267 and indica hybrid @entity579 were opposite with conventional @entity27267 . The yield loss of conventional @entity27267 was significantly higher than those of the other types of @entity579 . These results suggested that the submergence tolerance ability of hybrid @entity27267 is superior to indica hybrid @entity579 , and the submergence tolerance ability of conventional @entity27267 is the weakest.

[Comparison on submergence tolerance of different type XXXX at tillering stage in lower reaches of Yangtze River].

@entity579 :: ('4530', 'Species') :: ['rice'] @entity1865 :: ('CHEBI:566274', 'Chemical') :: ['MDA'] @entity27267 :: ('39947', 'Species') :: ['japonica rice']
@entity579 :: (4530,Species) :: ['rice']
