The Performance of Synthetic Varieties of Cotton 1
The Performance of Synthetic Varieties of Cotton 1
复制标题
棉花合成品种的性能1
DOI：
10.2135/cropsci1962.0011183x000200010014x
复制
发表时间：
1962
期刊：
影响因子：
2.3
通讯作者：
D. D. Porter
中科院分区：
文献类型：
--
作者：
E. N. Duncan;J. B. Pate;D. D. Porter
合成品种提供了在异花授粉或经常异花授粉作物中利用一定程度的杂种优势的机会。已经培育出产量和其他性状均优于开放授粉玉米的合成品种 (3, 4, 11)。然而，玉米合成物的生产并不明显，可能是因为双交杂交通常优于合成物，并且可以相对容易和经济地生产第一代玉米杂交种子。合成品种应该为棉花等作物提供更大的商业可能性，而目前第一代杂交种子的批量生产还不切实际。棉花杂种优势的研究主要关注在第一代水平上实现产量和其他性状的最大提高。几位研究人员报告了这一水平的显着增加（8、9、10、13、16）。 Loden 和 Richmond (10) 在一篇综合综述中指出，“有证据表明，在种间、品种间和品种内杂交中，大多数植物性状和产量因杂种优势而显着增加。”文献综述表明，对棉花合成品种的研究很少。事实上，许多广泛种植的商业棉花品种在狭义上都是合成棉花。它们代表混合混合物
SYNTHETIC varieties offer an opportunity to utilize a degree of heterosis in cross-pollinated or often crosspollinated crop plants. Synthetic varieties of corn superior in yield and other characters to open-pollinated ones have been produced (3, 4, 11). However, there is no appreciable production of corn synthetics presumably because doublecross hybrids are generally superior to synthetics, and first generation hybrid seed of corn can be produced with relative ease and economy. Synthetic varieties should offer greater commercial possibilities in a crop such as cotton in which volume production of first generation hybrid seed is impractical at present. Investigations of heterosis in cotton have been concerned primarily with attaining maximum increases in yield and other characters at the first generation level. Significant increases at this level have been reported by several investigators (8, 9, 10, 13, 16). Loden and Richmond (10) in a comprehensive review stated that "evidences of significant increases in most plant characters and yield resulting from heterosis have been reported in interspecific, intervarietal and intravarietal crosses." A review of the literature reveals that there have been few studies of synthetic varieties of cotton. In reality many of the widely grown commercial varieties of cotton are, in a narrow sense, synthetics. They represent blended mixtures