| 摘要: |
| 【目的】筛选出玉米优良自交系和杂交组合，探明玉米MM群体的育种潜势、所属杂优群体及杂优模式，为其进一步改良和利用提供依据。【方法】以6个分别代表我国玉米主要优势群的自交系(丹598、WN11、武109、丹599、X104和昌7 2)为测验种，采用NCⅡ遗传交配设计，对选自玉米MM改良群体的9个自交系进行配合力及杂种优势分析。【结果】MM群体中自交系 3、 4、 5 、7和9具有较高的产量一般配合力（GCA）相对效应值；组合9×丹599、6×WN11、3×武109、8×WN11和1×丹598的产量特殊配合力（SCA）相对效应值较高；9×丹599、3×武109、5×丹598、4×丹599和7×丹598的产量配合力总效应（TCA）较高；9×丹599和3×武109的产量对照优势较强；MM群体与WN11和X104间杂交无优势，而与丹598和丹599杂交优势较大。【结论】玉米MM群体中自交系3、4和5产量GCA较高，可用于配制组合；组合9×丹599和3×武109较对照增产，可进一步进行试验；MM群体与兰卡斯特群和瑞德黄马牙群种质亲缘关系较近，为这两类血缘兼有的优势群，可与旅大红骨群及P群构建杂优模式。 |
| 关键词: 玉米改良群体 自交系 配合力 杂种优势 |
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| 基金项目:陕西省“13115”科技创新工程重大科技专项 （2010ZDKG-67）；陕西省科技攻关项目（2011K02-09）；西北农林科技大学唐仲英育种基金项目（200902090089） |
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| Analysis of yield combining ability and heterosis of selective lines from the improved maize population MM |
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| Abstract: |
| 【Objective】To further improve and utilize MM population,elite inbred lines and hybridized combinations were screened,and their breeding potentials,heterotic groups and heterosis pattern of MM population were investigated.【Method】6 inbred lines(Dan598,WN11,Wu109,Dan599,X104 and Chang7-2) representing the domestic main advantage groups were used as testers,and the combining ability and heterosis of 9 inbred lines selected from the improved maize population MM were analyzed using NCⅡ genetic mating design.【Result】The relative effects of GCA of the inbred lines 3,4,5,7 and 9 are high and the crosses with high relative effects of SCA for yield per plant were 9×Dan599,6×WN11,3×Wu109,8×WN11 and 1×Dan598.The crosses with high TCA for yield per plant were 9×Dan599,3×Wu109,5×Dan598,4×Dan599 and 7×Dan598 and the crosses with high control heterosis for yield per plant were 9×Dan599 and 3×Wu109.Hybridization between the MM population with WN11 and X104 had no advantage,but hybridization between the MM population with Dan598 and Dan599 had large advantages.【Conclusion】Inbred lines 3,4 and 5 had higher yields of GCA and can be used for the preparation of the combination.Yields of combinations 9×Dan 599 and 3×Wu109 were higher than the contrast and should be further tested.The MM population is consanguinity similar to the population of Lancaster and Reid yellow dent.It was identified as the population possessing the advantages of both populations,and can be used to build heterotic patterns with Ludahonggu population and P population. |
| Key words: the improving maize population inbred lines combining ability heterosis |
