植物遗传资源学报
植物遺傳資源學報
식물유전자원학보
JOURNAL OF PLANT GENETLC RESOURCES
2009年
4期
540-546
,共7页
金铭路%杨春刚%余腾琼%郭桂珍%汤翠凤%张俊国%阿新祥%曹桂兰%徐福荣%刘宪虎%戴陆园%张三元%韩龙植
金銘路%楊春剛%餘騰瓊%郭桂珍%湯翠鳳%張俊國%阿新祥%曹桂蘭%徐福榮%劉憲虎%戴陸園%張三元%韓龍植
금명로%양춘강%여등경%곽계진%탕취봉%장준국%아신상%조계란%서복영%류헌호%대륙완%장삼원%한룡식
水稻%微核心种质%生育时期%耐冷性%相关关系
水稻%微覈心種質%生育時期%耐冷性%相關關繫
수도%미핵심충질%생육시기%내랭성%상관관계
Rice( Oryza sativa L.)%Core collection%Growing period%Cold tolerance%Correlation
以204份中国水稻微核心种质为试验材料,进行了水稻发芽期、芽期、幼苗期、孕穗期等耐冷性鉴定及其相关性分析.结果表明,水稻各生育时期耐冷性在籼粳亚种间、各种质之间存在明显的差异.粳稻种质的耐冷性明显强于籼稻种质,但籼稻种质中也存在耐冷性较强的种质.高阳淀稻大红芒、肥东塘稻、木樨球、卫国、兴国、山酒谷、中花8号等粳稻种质和包选21号、红米三担白、寸谷糯、红谷等籼稻种质在水稻各生育时期均表现较强的耐冷性,在水稻耐冷性育种及耐冷基因发掘研究中应加以利用.自然低温和冷水胁迫下水稻结实率与低温下发芽率呈显著或极显著正相关,而与死苗率呈显著负相关,即低温下发芽期耐冷性和芽期耐冷性强的水稻种质一般表现为较强的孕穗期耐冷性.认为低温下发芽率和芽期低温处理后的死苗率可以作为孕穗期耐冷性早期鉴定的间接指标.
以204份中國水稻微覈心種質為試驗材料,進行瞭水稻髮芽期、芽期、幼苗期、孕穗期等耐冷性鑒定及其相關性分析.結果錶明,水稻各生育時期耐冷性在秈粳亞種間、各種質之間存在明顯的差異.粳稻種質的耐冷性明顯彊于秈稻種質,但秈稻種質中也存在耐冷性較彊的種質.高暘澱稻大紅芒、肥東塘稻、木樨毬、衛國、興國、山酒穀、中花8號等粳稻種質和包選21號、紅米三擔白、吋穀糯、紅穀等秈稻種質在水稻各生育時期均錶現較彊的耐冷性,在水稻耐冷性育種及耐冷基因髮掘研究中應加以利用.自然低溫和冷水脅迫下水稻結實率與低溫下髮芽率呈顯著或極顯著正相關,而與死苗率呈顯著負相關,即低溫下髮芽期耐冷性和芽期耐冷性彊的水稻種質一般錶現為較彊的孕穗期耐冷性.認為低溫下髮芽率和芽期低溫處理後的死苗率可以作為孕穗期耐冷性早期鑒定的間接指標.
이204빈중국수도미핵심충질위시험재료,진행료수도발아기、아기、유묘기、잉수기등내랭성감정급기상관성분석.결과표명,수도각생육시기내랭성재선갱아충간、각충질지간존재명현적차이.갱도충질적내랭성명현강우선도충질,단선도충질중야존재내랭성교강적충질.고양정도대홍망、비동당도、목서구、위국、흥국、산주곡、중화8호등갱도충질화포선21호、홍미삼담백、촌곡나、홍곡등선도충질재수도각생육시기균표현교강적내랭성,재수도내랭성육충급내랭기인발굴연구중응가이이용.자연저온화랭수협박하수도결실솔여저온하발아솔정현저혹겁현저정상관,이여사묘솔정현저부상관,즉저온하발아기내랭성화아기내랭성강적수도충질일반표현위교강적잉수기내랭성.인위저온하발아솔화아기저온처리후적사묘솔가이작위잉수기내랭성조기감정적간접지표.
The evaluation of cold tolerance at the germination period,the budbersting period,the seedling stage and the booting stage and its correlation analysis were conducted,using 204 accessions of core collection of rice( Oryza sativa L.)in China.The results showed that there were obvious different cold tolerance between Japonica rice and Indica rice of sub species,and among rice germplasms.The cold tolerance of Japonica rices was stronger than those of Indica rices,but there were some stronger cold tolerant germplasms of Indica rices.The Japonica rices such as Gaoyangdiandaodahongmang,Feidongtangdao,Muxiqiu,Weiguo,Xingguo,Shanjiugu,Zhonghua 8 ect.and Indica rices such as Baoxuan 21,Hongmisandanbai,Cungunuo,Honggu ect.were showed stronger cold tolerance in several growing stages,which should be used in rice breeding for cold tolerance and identification of gene associating with cold tolerance.The seed setting rate under natural low temperature and cold water irrigation were significantly positively correlated with the vigor of germination under low temperature,while which were significantly negatively correlated with dead seedling rate,that was the rice germplasms with stronger cold tolerance at the germination period and the bud busting period under low temperature,had stronger cold tolerance at the booting stage.So the vigor of germination and dead seedling rate under low temperature could be used as cold tolerant index of cold tolerance at the booting stage in early growing stage.
