论文部分内容阅读
按4×4不完全双列杂交配制16个组合分5期播种,研究播期对配合力的影响。结果表明:不育系单株草重、谷草比、着粒数、实粒数、结实率、千粒重、株高和播始天数的GCA,恢复系谷草比、结实率和株高的GCA,以及单株粒重、千粒重和播始天数的SCA与播期间均存在显著互作。多数性状GCA与播期互作更重要。不同播期间千粒重、播始天数、着粒数、实粒数和单株有效穗的GCA稳定性较好,其余性状GCA,特别是SCA需多环境试验才能得到可靠结果。供试恢复系的GCA在播期间稳定性较好,不育系只有 8906S GCA的播期稳定性较好。GCA的稳定性与hN2及其变异系数分别呈显著正相关和负相关。单株粒重GCA及SCA稳定性分别与千粒重的GCA及谷草比的SCA稳定性密切相关。
According to 4 × 4 incomplete diallets, 16 combinations were sown for 5 periods to study the effect of sowing date on combining ability. The results showed that the GCA of plant weight, grain-to-grain ratio, grain number, grain number, seed setting rate, grain weight, plant height and days of inbreeding, GCA of restore toral ratio, seed setting rate and plant height There was significant interaction between SCA and sowing date of grain weight per plant, 1000-grain weight and days of sowing. Most traits GCA and sowing date is more important. The GCA stability of 1000-grain weight, days of sowing, grain number, seed number and effective panicles of different sowing dates were good. The other traits such as GCA, especially SCA needed more environmental tests to obtain reliable results. The GCA of restorer lines tested had better stability during sowing time, but only sowing date of 8906S GCA was better in sterile lines. GCA stability and hN2 and its coefficient of variation were significantly positive correlation and negative correlation. The stability of GCA and SCA per plant weight was closely related to the SCA stability of 1000-grain weight GCA and grain-straw ratio, respectively.