CAJ | 학술논문

遗传多样性分析对于作物资源评价和利用具有重要的意义.本研究以我国北方冬麦区136份小麦抗旱种质资源为材料.分析10个农艺性状及其耐旱指数的相关性,以及抗旱种质的遗传多样性.结果表明:在雨养和灌溉条件下,穗叶距的变异系数最高,分别为42.1%和37.2%,单穗总小穗数的变异系数最低,为6.4%和5.7%;不同水分条件下,植株稳产性主要受单株穗数、有效小穗数及穗下节长的影响;性状耐旱指数的多样性指教在1.95到2.07之间变化,平均值为2.02;根据性状耐旱指数将供试材料分为7个类群,其中第Ⅰ、第Ⅲ类群材料表现为对水分条件不敏感,而第Ⅱ类群材料更适于在干旱条件下种植.材料之间的抗旱性差异可以作为抗旱育种中亲本选配的依据.
유전다양성분석대우작물자원평개화이용구유중요적의의.본연구이아국북방동맥구136빈소맥항한충질자원위재료.분석10개농예성상급기내한지수적상관성,이급항한충질적유전다양성.결과표명:재우양화관개조건하,수협거적변이계수최고,분별위42.1%화37.2%,단수총소수수적변이계수최저,위6.4%화5.7%;불동수분조건하,식주은산성주요수단주수수、유효소수수급수하절장적영향;성상내한지수적다양성지교재1.95도2.07지간변화,평균치위2.02;근거성상내한지수장공시재료분위7개류군,기중제Ⅰ、제Ⅲ류군재료표현위대수분조건불민감,이제Ⅱ류군재료경괄우재간한조건하충식.재료지간적항한성차이가이작위항한육충중친본선배적의거.
Genetic diversity analysis in crops plays an important role in evaluation and utilization of crop germplasm resources.In this study.the genetic diversity of 136 wheat(Triticum aestivum L.)germplasm resources with drought resistance were analyzed based on ten agronomic traits and their drought tolerance index(DTI)in rainfed (drought stress,DS)and well-watered(WW)environments.The results showed that length from flag leaf pulvinus to spike base(LFS)had the largest coefficient of variance(cv)of 42.1% and 37.2% in both DS and WW environments,respectively,while the spikelet per spike(SPS)had the smallest CV of 6.4% and 5.7%.Under different water regimes,spike number per plant(SNP),effective spikelet per spike(ESPS)and peduncle length(PLE)contributed a lot to the stable grain yield.Genetic diversity indices of DTI were from 1.95 to 2.07,with an average value of 2.02.Based on the DTI of agronomic traits,all accessions could be clustered into seven groups,the first and third groups were not sensitive to the water regimes,and the second group was more suitable for planting in dryland.The diversity message on the drought-tolerant plant material might be helpful for the DT improvement in wheat.