Analysis on Factors Affecting Seedling Establishment in Rice  

作　　者：LUO Jux TANG Shao-qing HU Pei-song Aleman LOUIS JIAO Gui-ai TANG Jian 

机构地区：[1]China National Rice Research Institute, Hangzhou 310006, China [2]Cuba National Rice Research Institute, Havana, Cuba

出　　处：《Rice science》2007年第1期27-32,共6页水稻科学（英文版）

基　　金：This work was supported by the National Basic Research Program of China （Grant No. 2002CCA04100）；the Key Science and Technology Program of Zhejiang Province, China （Grant No. 2003C34012）；China Rice Science Foundation （Grant No. CRSF0003338）；International Atomic Energy Agency （IAEA） Training Program.

摘　　要：Elongations of coleoptile and mesocotyl are related directly to rice seedling establishment in soil and height of plant is related to lodging in rice production. Twelve typical rice cultivars with different lengths of coleoptile and mesocotyl （long, medium and short） were selected by screening the lengths of coleoptile and mesocotyl in 1500 accessions. The seedling establishments of these typical cultivars were compared under the combinations of different sowing depths and flooding durations, and two semi-dwarf varieties （G140, Zhong 96-21） with good seedling establishments and optimum mesocotyl lengths were found. The length of mesocotyl was completely fitted negative binomial distribution and the length of coleoptile was nearly fitted Iognormal distribution. Analysis of the relationships among mesocotyl, coleoptile, seeding depth, flooding duration, and their interactions to seedling establishment percentage showed that there existed significant relations among mesocotyl, coleoptile, mesocotyl x coleoptile, seeding depth, flooding duration and mesocotyl x sowing depth in the experiment for seedling establishment.Elongations of coleoptile and mesocotyl are related directly to rice seedling establishment in soil and height of plant is related to lodging in rice production. Twelve typical rice cultivars with different lengths of coleoptile and mesocotyl （long, medium and short） were selected by screening the lengths of coleoptile and mesocotyl in 1500 accessions. The seedling establishments of these typical cultivars were compared under the combinations of different sowing depths and flooding durations, and two semi-dwarf varieties （G140, Zhong 96-21） with good seedling establishments and optimum mesocotyl lengths were found. The length of mesocotyl was completely fitted negative binomial distribution and the length of coleoptile was nearly fitted Iognormal distribution. Analysis of the relationships among mesocotyl, coleoptile, seeding depth, flooding duration, and their interactions to seedling establishment percentage showed that there existed significant relations among mesocotyl, coleoptile, mesocotyl x coleoptile, seeding depth, flooding duration and mesocotyl x sowing depth in the experiment for seedling establishment.

关 键 词：direct seeding seedling establishment COLEOPTILE MESOCOTYL RICE 

分 类 号：S511.04[农业科学—作物学]