An awn is a hairy or bristle-like growth on a plant. On the seeds of grasses such as barley or rye, they form foxtails which assist seed dispersal by being barbed and so sticking to passing animals. Also, the awns may twist or curl as they are wetted and dry out and this action can make fallen seeds walk until they fall into a crevice into ...

2023年3月1日 · Archeological and historical records show that wheat spikes were predominantly awned across many millennia after domestication, while small awns or awnless spikes were common during the last millennium.

2025年2月28日 · We mapped QAwn.sxau-5A, a major QTL for awn development in wheat (Triticum aestivum). This QTL was delimited to a 994-kb interval at the B1 locus on chromosome 5A, which included the candidate gene encoding a zinc finger protein (TraesCS5A01G542800) as an awn length inhibitor (ALI).

2023年7月10日 · Awn development in wheat is determined by five main genes (B1, b1 a, B2, A, and Hd), as well as some other minor-effect genes. The A gene promotes awn elongation, whereas B-class genes inhibit awn elongation, and the Hd …

2007年5月11日 · The dispersal unit of wild wheat bears two pronounced awns that balance the unit as it falls. We discovered that the awns are also able to propel the seeds on and into the ground. The arrangement o...

2017年4月24日 · Three main dominant inhibitors of awn development (Hd, B1 and B2) are known in hexaploid wheat, but the causal genes have not been cloned yet and a genetic association with awn length diversity has been found only for the B1 allele. To analyze the prevalence of these three awning inhibitors, we attempted to predict the genotypes of 189 ...

2019年10月19日 · Wheat awn plays a vital role in photosynthesis, grain production, and drought tolerance. However, the systematic identification or cloning of genes controlling wheat awn development is seldom reported.

2014年2月4日 · Awn of wheat is an important photosynthetic and transpiration organ on spike. In this study, awn transverse sections of Triticum monococcum, Triticum dicoccum, Triticum durum, Secale cereale, Hordeum vulgare and 3 common wheat …

2020年9月1日 · Wheat domestication first and human selection later developed wheat plants with shorter, or even without, awns (Mach, 2015). Despite that domestication in some environments went against awns (not having sense to avoid herbivory or benefit seed dispersal in an agricultural condition), it seems possible that they may bring about other advantages ...

In this review we use primarily the physiological processes related to cereal crops, including rice (Oryza sativa L.), wheat (Triticum aestivum L.), barley (Hordeum vulgare L.), and rye (Secale cereale L.), and insights from some forage grasses to discuss and summarize the impacts of awns on specific grain traits.