草原与草坪
草原與草坪
초원여초평
GRASSLAND AND TURF
2012年
6期
11-16
,共6页
赵雁%毕玉芬%王荟%邵辰光
趙雁%畢玉芬%王薈%邵辰光
조안%필옥분%왕회%소신광
紫花苜蓿%秋眠级%萌发期%耐热性
紫花苜蓿%鞦眠級%萌髮期%耐熱性
자화목숙%추면급%맹발기%내열성
Medicago sativa%fall dormancy%germination period%thermotolerance
为了探明高温胁迫对不同秋眠级紫花苜蓿种子萌发的影响,在25和35℃条件下,对14个不同秋眠级紫花苜蓿品种种子进行萌发试验,以发芽率、发芽指数、活力指数、胚根鲜重和发芽势为指标,结合协方差分析、模糊隶属函数和聚类分析统计方法,对各紫花苜蓿品种萌发期耐热性进行分析和综合评价。结果表明：高温胁迫对不同秋眠级紫花苜蓿的种子萌发有影响,高秋眠级品种赛迪10的耐热最强,其发芽指数、活力指数、胚根鲜重、发芽势和发芽率在14个参试品种中最高,分别为67.78、66.70、0.98g、99.33%和92.89%;聚类分析的结果表明,14个品种萌发期耐热性可划分为3类,耐热性较强的品种为标秆、WL903、1075、三得利、赛迪10和赛阔,耐热性较弱的品种为Power、猎人河和阿尔冈金,其余品种耐热性一般;在种子萌发阶段,高秋眠级类型的紫花苜蓿品种表现较强的耐热性,低秋眠级类型的品种耐热性较弱。种子活力指数可作为评价紫花苜蓿萌发期耐热性强弱的有效指标。
為瞭探明高溫脅迫對不同鞦眠級紫花苜蓿種子萌髮的影響,在25和35℃條件下,對14箇不同鞦眠級紫花苜蓿品種種子進行萌髮試驗,以髮芽率、髮芽指數、活力指數、胚根鮮重和髮芽勢為指標,結閤協方差分析、模糊隸屬函數和聚類分析統計方法,對各紫花苜蓿品種萌髮期耐熱性進行分析和綜閤評價。結果錶明：高溫脅迫對不同鞦眠級紫花苜蓿的種子萌髮有影響,高鞦眠級品種賽迪10的耐熱最彊,其髮芽指數、活力指數、胚根鮮重、髮芽勢和髮芽率在14箇參試品種中最高,分彆為67.78、66.70、0.98g、99.33%和92.89%;聚類分析的結果錶明,14箇品種萌髮期耐熱性可劃分為3類,耐熱性較彊的品種為標稈、WL903、1075、三得利、賽迪10和賽闊,耐熱性較弱的品種為Power、獵人河和阿爾岡金,其餘品種耐熱性一般;在種子萌髮階段,高鞦眠級類型的紫花苜蓿品種錶現較彊的耐熱性,低鞦眠級類型的品種耐熱性較弱。種子活力指數可作為評價紫花苜蓿萌髮期耐熱性彊弱的有效指標。
위료탐명고온협박대불동추면급자화목숙충자맹발적영향,재25화35℃조건하,대14개불동추면급자화목숙품충충자진행맹발시험,이발아솔、발아지수、활력지수、배근선중화발아세위지표,결합협방차분석、모호대속함수화취류분석통계방법,대각자화목숙품충맹발기내열성진행분석화종합평개。결과표명：고온협박대불동추면급자화목숙적충자맹발유영향,고추면급품충새적10적내열최강,기발아지수、활력지수、배근선중、발아세화발아솔재14개삼시품충중최고,분별위67.78、66.70、0.98g、99.33%화92.89%;취류분석적결과표명,14개품충맹발기내열성가화분위3류,내열성교강적품충위표간、WL903、1075、삼득리、새적10화새활,내열성교약적품충위Power、작인하화아이강금,기여품충내열성일반;재충자맹발계단,고추면급류형적자화목숙품충표현교강적내열성,저추면급류형적품충내열성교약。충자활력지수가작위평개자화목숙맹발기내열성강약적유효지표。
To explore the influence of heat stress on the seed germination of Medicago sativa cultivars with different fall dormancy, five germination characteristics (germination rate, germination index, vigor index, fresh weight of radicle and germinability) have been tested to evaluate the thermotolerance of alfalfa eultivars with 14 different fall dormancy during germination stage. Using covariance,the membership functions and cluster analy sis,the results showed that the thermotolerance of different cuhivars was significantly different at seed germina- tion stage under heat stress. "Sardil0",a high fall dormancy cultivar,has the strongest heat tolerance,with high est germination index, vigor index, fresh weight of radicle, germinability and germination rate as 67.78,66.70,0. 98 g,99.33% and 92.89~ respectively. Cluster analysis divided these 14 cultivars into three thermotolerance categories : cultivars with highest thermotolerance, including "Biaogan','WL903','1075", and "Sanditi'; cultivars with the lowest thermotolerance,including "Sardi10"and'Sequel',and 'Power','Hunter River" and "Algonquin'. The other are cultivars have medium thermotolerance. Non-fall dormancy cultivars showed stronger thermotolerance at the stage of germination than fall dormancy cultivars. The vigor index was an effective thermotolerance index of alfalfa at seed germination stage in this study.
