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用传统种质与云南野生种质远缘杂交 ,以“异质复合分离理论”假说、3交技术模式、 5级选育程序 ,就 5个内容对传统的 POJ、Co、ROC体系进行创新研究。一是将种质基础从 ROC体系的 1属 4种 11个原种品系扩大到 3属 6种 2 4个原种品系 ,其中栽培原种品系与野生原种品系数的比例从 8∶ 3调整为 12∶ 12 ,实现种质遗传平衡 ;二是将育成品种内栽培原种与野生原种的染色体比例从 7∶ 1- 9∶ 1调整为 2∶ 1- 3∶ 1,实现细胞遗传平衡 ;三是用杂交复合法将传统种质的糖分及产量性状、野生种质的抗性及适应性状分别形成“性状复合遗传力”,产生杂合体杂种优势 ;四是用自交分离法将杂合体杂种优势中的优良性状连锁遗传及目的性状超亲变异分离出来 ;五是用回交重组法将分离出来的高产高糖与抗性及适应性性状基因优化重组 ,在分子水平上产生性状兼优的杂种优势。 2 0 0 1年起将陆续提供云南 YN系列杂交花穗
Using traditional germplasm and Yunnan wild germplasm distant hybridization, the traditional POJ, Co, ROC system was innovatively studied on the basis of “heterogeneous compound separation theory” hypothesis, 3 cross-technology model and 5-level breeding program . First, the germplasm base was expanded from 4 species of 11 species of 4 genera in the ROC system to 6 species of 2 species of 4 species in 3 genera, of which the ratio of cultivated species to wild species was adjusted from 8: 3 12: 12 to achieve genetic balance of germplasm. The other is to adjust the chromosome proportion of cultivated species and wild species in breeding varieties from 7: 1 to 9: 1 to 2: 1 to 3: 1 to achieve cytogenetic balance. The third is the hybridization method will be the traditional germplasm of sugar and yield traits, wild germplasm resistance and adaptive traits, respectively, the formation of “trait heritability” to produce heterozygous heterosis; Fourth, by self-isolation of hybrids Heterosis, heterosis and genetic variation of the target trait; fifthly, the high-yielding high-sugar and the genes of resistance and adaptive traits separated by backcross recombination were optimized and recombined, and the characters were excellent at the molecular level Heterosis. Since 2001, Yunnan YN series hybrid spikes will be provided one after another