青贮玉米单交种、三交种对生物产量影响.docVIP

青贮玉米单交种、三交种对生物产量影响摘 要：为了研究青贮玉米单交种、三交种对F1的影响，选用6个有代表性的青贮玉米育种材料，组配成4组不同的单交种、三交进行产量观测试验。结果表明，第二单交组合与第一单交组合、三交组合间存在显著差异，是优良组合；第一单交组合与三交组合间基本持平。说明单交组合在生物产量上有显著的优势（一般配合力情况）。B2组的单交组合的生物产量增产显著。但在特殊组合产量比较时，第二组的三交组合产量最高。单交组合能更广范地提高青贮玉米的生物产量。但也不否认特殊的三交组合可以获得好的生物产量。通过产量回归分析得知，各指标与产量的相关性排序为：株高＞籽粒＞行粒＞穗长＞秸秆＞穗位高，且均达极显著水平，穗粗达显著水平，穗行与生物产量成正相关，果穗秃长与生物产量成负相关。 关键词：青贮玉米；单交种；三交种；产量 中图分类号：S513 文献标识码：A DOI编码：10.3969/j.issn.1006－6500.2012.04.031 Effect of Single-crossed Hybrid and Tri-crossed Hybrid of Silage Maize on their F1 Hybrids CHEN Gui-lan, YANG Kang-chun, MENG Yue-qun,JIANG Ye-zhao,LI Xiao-xia (Liuzhou Research Institute of Agricultural Sciences, Guizhong Branch, Guangxi Academy of Agricultural Sciences,Liuzhou，Guangxi 545003,China) Ａｂｓｔｒａｃｔ: In order to research the effect of silage maize single-crossed hybrid and tri-crossed hybrid on their F1 hybrids,six inbred lines of silage maize were selected to make up four groups of singe-crossed hybrids and tri-crossed hybrids for comparison of yield performance.The results showed that the single-crossed hybrids of B2 showed significant difference from the single-crossed hybrids of B1 and tri-crossed hybrids of B3，and no significant difference between single-crossed hybrids of B1 and tri-crossed hybrids of B3, suggesting that single-crossed hybrid had advantage on yield. The single-crossed hybrids of B2 led to a significant increase in yield, while the tri-crossed hybrid in the second group showed the maximum yield. The single crossed hybrid led to a general increase in yield of silage maize, and the tri-crossed hybrid could obtain a good yield. Regression analysis of yield revealed that factors order of being very significantly positively correlative with yield were: plant heightmaize seed grain number ear lengthstraw weightear height per row, ear width was significant correlation. ear row number,was positively correlative with yield, and negative correlation was found between rare ear and yield. Key words: silage maize；sing