Germplasm of the perennial pasture grass Phalaris aquatica L., from Sardinia, Italy, is a potentially valuable source for grass breeders owing to climatic similarities to regions where P. aquatica is used, a relatively high incidence of acidic soils, and exposure to prolonged grazing pressure. At field sites in south-eastern Australia, Sardinian accessions were compared as spaced plants and drill-rows with accessions from southern Europe and north-western Africa and with commercial cultivars. They were also evaluated in grazed swards at three sites over 4 years under conditions that challenge persistence, including heavy grazing pressure, acid soils and drought. Morphologically, the accessions were comparatively dense, fine and short, with similarities to southern European accessions and cultivars of the cv. Australian type. However, they were earlier heading and more summer-dormant, particularly those from southern Sardinia. In drill-rows, Sardinian accessions were later heading and less productive in winter than accessions from Morocco. In swards, Sardinian accessions had lower seedling vigour and winter growth potential than modern winter-active cultivars. However, they were dense and persistent under high grazing pressure, and some accessions survived better than all cultivars on an acid, low-fertility soil. Developing cultivars that are superior to the cv. Australian type with acceptable seed production and alkaloid levels presents a challenge to breeders. However Sardinian germplasm offers a range of maturity times combined with higher levels of summer dormancy and a grazing-tolerant morphology, attributes that may expand the area of adaptation of the species into the hotter and more drought-prone margin.

来自意大利撒丁岛的多年生牧草Phalaris aquatica L.的种质资源由于其与P. aquatica的气候相似而成为种草业者的潜在有价值来源使用时，酸性土壤的发生率相对较高，并且长期处于放牧压力之下。在澳大利亚东南部的田间地点，将撒丁岛的种质作为间隔的植物和钻行与南欧和西北非洲的种质以及商业品种进行比较。在挑战持续性的条件下（包括沉重的放牧压力，酸性土壤和干旱），在超过4年的三个地点的放牧草地中对它们进行了评估。从形态上讲，这些种质比较稠密，精细和短小，与南欧的种质和栽培品种相似。澳大利亚类型。但是，他们的航程较早，夏季休眠更多，尤其是来自撒丁岛南部的那些。在钻探行中，撒丁岛的种质后来比摩洛哥的种质更往前生长，并且冬季生产力较低。在草地上，撒丁岛种质的种子活力和冬季生长潜力均低于现代冬季活性品种。然而，它们在高放牧压力下是密集且持久的，在酸性低肥力的土壤上，某些种质的存活比所有品种更好。培育出优于简历的品种。具有可接受的种子产量和生物碱水平的澳大利亚类型对育种者提出了挑战。然而，撒丁岛种质提供了一系列的成熟时间，加上更高水平的夏季休眠和耐吃草的形态，这些属性可能使该物种的适应范围扩大到更热和更容易干旱的边缘。它们在高放牧压力下密集且持久，在酸性低肥力的土壤上，某些种质的存活比所有品种更好。培育出优于简历的品种。具有可接受的种子产量和生物碱水平的澳大利亚类型对育种者提出了挑战。然而，撒丁岛种质提供了一系列的成熟时间，加上更高水平的夏季休眠和耐吃草的形态，这些属性可能使该物种的适应范围扩大到更热和更容易干旱的边缘。它们在高放牧压力下密集且持久，在酸性低肥力的土壤上，某些种质的存活比所有品种更好。培育出优于简历的品种。具有可接受的种子产量和生物碱水平的澳大利亚类型对育种者提出了挑战。然而，撒丁岛种质提供了一系列的成熟时间，加上更高水平的夏季休眠和耐吃草的形态，这些属性可能使该物种的适应范围扩大到更热和更容易干旱的边缘。