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分别选用实生苗阶段不同丛有效茎水平品系120份和28个杂交组合不同成苗数实生苗840份作为试验材料,研究实生苗无性繁殖后出苗率、有效茎、丛有效茎和芽成茎数4个芽成茎指标在品系间和水平间的差异及广义遗传力,以及实生苗成苗数、成茎数和成茎率的广义遗传力和遗传相关。结果表明:无性繁殖后出苗率和有效茎数、丛有效茎数、芽成茎数的品系间和水平间差异均达极显著水平,其广义遗传力分别为0.58、0.65、0.84和0.84;实生苗阶段丛有效茎数≥5的品系芽成茎指标总体显著高于4条及以下的品系,且主要为强丛生性品系,占61.29%以上;实生苗成苗数和丛有效茎数组合间的差异极显著,其广义遗传力分别为0.67和0.76,成苗数和丛有效茎数的遗传相关性达极显著水平;不同成苗水平实生苗丛有效茎间的差异极显著,丛有效茎数随成苗数的增加而显著增加;成苗数≥7的实生苗仅占30.24%,丛有效茎数≥5的实生苗仅占13.81%。
120 seedlings of different effective pods and 840 different seedlings of 28 hybrid combinations were selected as test materials to study the seedling emergence rate, effective stems, effective stems and shoots into stems Differences and general heritability of four bud stem indexes among lines and between horizontal lines, as well as the general heritability and genetic correlation of seedling number, stem number and stem yield of seedlings. The results showed that there were significant differences in the germination rate, the number of effective stems, the effective number of stems and the number of buds and stems between the two groups after asexual reproduction. The general heritabilities were 0.58, 0.65, 0.84 and 0.84 respectively. The number of shoots with stems with effective stalks≥5 was significantly higher than those with 4 or less buds at the seedling stage and mainly consisted of strong cluster lines, accounting for more than 61.29%. The number of seedlings and the number of effective stalks The genetic heritability was 0.67 and 0.76, respectively. The genetic correlation between the number of seedlings and the number of plexiform stems reached extremely significant level. The difference between the effective stems of seedlings at different seedling levels was extremely significant, The number of seedlings increased significantly with the number of seedlings increased. Only 30.24% of seedlings with seedlings ≥7 and only 13.81% of seedlings with effective stems ≥5.