烤烟主要挥发性香气物质含量的亲子相关及杂种优势分析  

Analysis of correlation between parents and offspring and heterosis performance of the contents of main volatile aroma components in flue-cured tobacco

作　　者：许仪[1] 卢秀萍[2] 许自成[1] 肖炳光[2] 何登峰[1] 

机构地区：[1]河南农业大学农学院,河南郑州450002 [2]云南省烟草科学研究所,云南玉溪653100

出　　处：《西北农林科技大学学报（自然科学版）》2007年第12期149-154,共6页Journal of Northwest A&F University(Natural Science Edition)

基　　金：国家烟草专卖局科技攻关项目(110200401007);云南省烟草公司科技攻关项目(04A01);河南省杰出人才创新基金项目(0421001900)

摘　　要：为了研究烤烟主要挥发性香气物质含量的遗传变异规律，采用NCⅡ设计配制了48个烤烟F1组合，分析了主要挥发性香气物质含量的亲子关系和杂种优势表现。结果表明：（1）烤烟挥发性香气物质总含量在F1组合间为493．22～1554．35μg／g，在亲本间为506．07～1164．03μg／g，F1组合挥发性香气物质含量大多显著高于其中亲值和低亲值。（2）各F1组合不同挥发性香气物质表现出的杂种优势强度明显不同，其中亲优势的大小为新植二烯（17．88％）〉挥发性香气物质总量（15．38％）〉芳香族氨基酸降解产物（8．07％）〉类胡萝卜素降解产物（5．81％）〉类西柏烷降解产物（2．75％）〉美拉德反应物（2．62％）；新植二烯（3．62％）和挥发性香气物质总量（3．15％）表现为正向超亲优势，其他各类香气物质均表现为负向超亲优势。（3）除类胡萝卜素降解产物外，F1组合的其他各类挥发性香气物质均受高亲值和中亲值的显著影响；大部分香气物质在中亲优势间和超亲优势间均存在显著相关关系。以上结果为烤烟亲本选配和香气性状的遗传改良提供了理论依据。In order to study the laws of genetic variation of main volatile aroma components, 48 F1 com- binations had been obtained according to NC Ⅱ design and the contents of volatile aroma components in flue-cured tobacco were analyzed. The results showed： （1） The total content of volatile aroma matter in flue-cured tobacco ranged from 493.22 to 1 554.35μg/g for F1 combinations,and from 506.07 to 1 164.03 μg/g for parents. The contents of volatile aroma components in F1 combinations of flue-cured tobacco were mostly significantly higher than their mid-parent value and low-parent value. （2） Different volatile aroma components had obviously different heterosis in F1 combinations. The order of heterosis over mid-parent was ： neoplytadiene （ 17.88 % ） 〉 total content of volatile aroma matter （ 15.38 %） 〉 products of aromatic a- mino （8.07%）〉products degraded by carotene （5.81%）〉products degraded by cembrane （2.75%）〉products of maillard reaction （2.62~）. Both neoplytadiene （3.62%）and total content of volatile aroma matter （3. 15%）showed positive heterosis over the better parent; other aroma matters,however, showed negative heterosis over the better parent. （3） Aroma matters except products degraded by carotene in F1 combinations could be significantly affected by high-parent and mid-parent values; significant correlations among heterosis over mid-parent and among heterosis over the better parent were found for most volatile a- roma components. The above results could give a reference for parent selection and aroma matter improve- ment in flue-cured tobacco breeding.

关 键 词：烤烟 挥发性香气物质 亲子相关 杂种优势 

分 类 号：S572.033[农业科学—烟草工业]