Climate change is causing a huge loss in biodiversity throughout the globe and the rate has accelerated in recent years. Plant diversity of temperate regions has continuously suffered due to this. The importance of conservation of wild relatives/species of staple crop such as Elymus, Leymus, Thinopyrum, Lolium either in situ or ex situ is essential to sustain these resources for future use due to their ability to withstand in a stressful environment. Thus plant researchers are always in a quest to explore novel species to enhance the genetic diversity of wild crop relatives to improve the resilience of staple crops to a wide range of stress conditions. Keeping these viewpoints in mind, in 2016–2018, we have explored the Lahaul valley, a cold arid region of District Lahaul and Spiti, Himachal Pradesh. A total of 230 accessions of four different species belonging to genus Elymus viz-E. semicostatus (Nees ex steud.) Meld., E. repens Gould, E. dahuricus Turrcz Ex Griseb. and E. longiaristatus (Boiss.) Tzvelev subsp. Canaliculatus (Nevski) Tzvelev belonging to the family Poaceae, tribe Triticeae were taken into consideration. Wide-range of variability was observed at an inter-and intraspecific level among these species. The variations in morphological characters at different ecological amplitudes were recorded. The presence of variation in abiotic stress tolerance traits such as spike pigmentation, low seed shattering, dense pubescence, waxiness was observed. Forty traits were recorded during field evaluation to ease wheat breeders and researchers to identify germplasm during the collection at an in situ level. The population of these four species had a variation for qualitative and quantitative traits at different ecological regimes at their native habitat suggesting their adaptability to a particular niche. Pre-breeding on these germplasm resources could be initiated for introgression novel alleles in wheat to mitigate environmental constraints posed by changing climate.

气候变化正在全球范围内造成生物多样性的巨大损失，并且近年来这种情况还在加速发展。因此，温带地区的植物多样性不断遭受损害。保护野生亲缘种/主食作物（如披碱草，羊草，Thinopyrum，黑麦草）的重要性由于这些资源在压力环境中的承受能力，无论是原地还是非原位，对于维持这些资源以备将来使用都是必不可少的。因此，植物研究人员一直在探索新物种，以增强野生作物近缘种的遗传多样性，从而提高主食作物在各种胁迫条件下的适应力。牢记这些观点，在2016–2018年，我们探索了喜马拉雅邦拉豪尔和斯皮提地区的寒冷干旱地区拉豪尔谷。共有230个属于四个不同物种的隶属大麦草（Elymus viz- E.semicostatus）（Nees ex steud。）Meld。，E。repens Gould，E。dahuricus Turrcz Ex Griseb。和E. longiaristatus（Boiss。）Tzvelev subsp。Canaliculatus（涅夫斯基）茨维列夫属于禾本科，属于Triticeae部落。在这些物种的种间和种内水平上观察到了广泛的变异性。记录了不同生态振幅下形态特征的变化。观察到非生物胁迫耐受性特征的变化，例如穗状色素沉着，低种子破碎，密集的短柔毛，蜡质。在田间评估中记录了40个性状，以方便小麦育种者和研究人员在采集过程中就地鉴定种质。这四个物种的种群在其原生栖息地的不同生态制度下，其定性和定量性状均发生变化，表明它们对特定生态位的适应性。