关键词: 水稻, 茎, 遗传分析

Abstract: Thispaperdeals with the reciprocal crosses of Grlc recessive High type in rice(Oryza Sativa subsp hsien) With four dwarf straw Japonica and ladica cultivars. In accordance with the pairing design of Six generations the genetic behavior of the generations plant height of Grlc was analysed. The results indicated as following:(1)The plant height of cross F₁ was dwarfer than that of the middle straw parents, closed to the dwarf straw parents and showed the negative heterosis, the coplet recessive either indica/indica or indica/japonica crosses;(2) The estimate of natrrow heritability was no-sighificant, was lower than that of broad beritability;(3) Grlc/lang-Jing 11 showed that the plant height was controlled by a pair of the recessive main genes, the addition, dominance and dominance×dominance displayed a top significant effect, while the cytoplasmic negative effect was no-significant,(4) Grle/the dwarf japonica 02428. Xiang-Xue Keng and D₁ showed that the plant height was controlled by a pair or more than two pairs of the recessive main genes. It was also influenced by minor genes or modifying genes, The effeat of addition-dominance-epistasis, addition-epistasis and addition was significant. In the Grlc/Xiang——Xue Keng, the cytoplasinic negative effect was significant. The results indicate that it is passible to select recessive high type restorer line, have a luther increase in the output of hybrid seed and overcome F₁ generation leaning in the bybrid of indica and japonica.

Key words: LOWIAND RICE, STEMS, CENETIC ANALYSIS