论文部分内容阅读
对8个陆地棉野生种系的种子形态,油分含量和粗蛋白含量、及水速率和耐盐性等性状与3个栽培品种进行了比较分析。结果表明,野生种系的种子普遍较小,并且变异大。种子油分和粗蛋白含量变幅大,分别为23.15～39.80%和28.83～39.31%。野生种系间种子的吸水速率和到达吸水高峰的时间存在着显著的差异,这与野生种系存在着一定程度的硬实种子有关。palmeri全是硬实种子,mexicanum,richmondi和yucatanense的硬实率分别为30.0%、26、6%和23.3%。野生种系的耐盐性在12%Nacl浓度时差异较为明显,其中punctatum,morrilli和marie—galante的耐盐性较强;mexicanum,latifolium和yucatanense的耐盐性与3个栽培品种相近。这说明在野生种系中筛选耐盐性强的材料是完全可能的。陆地棉野生种系(Gossypium hirsutum L.race)是棉花育种工作中重要的种质资源。自80年代初从陆地棉原产地墨西哥引入这些野生种系以后,关于它们的生物学特性和抗病性等性状,国内已作了一些研究分析。资料表明它们的变异类型丰富,分别具有抗病、抗虫和优质纤维等可供利用的性状和特性。本试验以8个野生种系的种子为材料,研究种子的形态特征和吸水发芽的能力,并以3个栽培品种的种子为对照进行比较,借以了解陆地棉野生种系的种子生物学特性,为育种提供依据。
The morphological, oil content and crude protein content, water rate and salt tolerance of eight wild G. hirsutum cultivars were compared with those of three cultivars. The results showed that the seeds of wild germplasm were generally smaller and varied greatly. Seed oil and crude protein content ranged from 23.15% to 39.80% and 28.83% to 39.31%, respectively. Significant differences exist between the rate of water absorption by the wild germplasm and the time to peak water uptake, which is related to the presence of some hard seeds in wild germ lines. Hardwoods of palmeri were all hardwood seeds, and hardwoods of mexicanum, richmondi and yucatanense were 30.0%, 26.6% and 23.3%, respectively. Salt tolerance of wild germplasm at 12% Nacl concentration was more obvious, of which punctatum, morrilli and marie-galante salt tolerance stronger; salt tolerance of mexicanum, latifolium and yucatanense and three cultivars similar. This shows that it is entirely possible to screen for salt-tolerant materials in wild germplasm. Gossypium hirsutum L.race is an important germplasm resource in cotton breeding. Since the early 1980s, the introduction of these wild germplasms from G. hirsutum origin Mexico has made some research and analysis about their biological characteristics and disease resistance and other traits. The data show that they are rich in variation types and have the traits and characteristics available for resistance, insect resistance and quality fiber, respectively. In this study, the seeds of eight wild germplasms were used as materials to study the morphological characteristics of seeds and the ability of water absorption and germination. The seeds of three cultivars were compared to understand the biological characteristics of the germplasm of G. hirsutum. Provide the basis for breeding.