摘要
果肉褐变是影响丝瓜品质的重要性状之一,对普通丝瓜果肉褐变程度进行遗传分析,为丝瓜的品质改良奠定基础。以易褐变自交系‘YX014’和耐褐变自交系‘LJ-01’配制成6个世代(P_1、P_2、F_1、F_2、B_1、B_2)为试验材料,应用数量性状主基因+多基因混合遗传模型对丝瓜果肉褐变特性进行遗传模式分析。结果表明:普通丝瓜果肉褐变程度的最佳遗传模型为E-_1模型,即由_2对加性-显性-上位性主基因+加性-显性多基因控制。B_1、B_2和F_2分离世代的主基因遗传率为81.20%、72.08%和0.52%,多基因遗传率均为0,环境方差占表型方差的比例分别是18.8%、27.92%和99.48%,表明丝瓜果肉褐变程度主要受2对主基因控制,以遗传效应为主,同时受环境影响较大,B_1、B_2世代主基因选择率高,应在早期世代进行选择。因此,在丝瓜褐变的群体改良中,可对低褐变单株进行定向选择或轮回选择,以提高育种效率。
Flesh browning is one of the important traits which affect the flesh quality of Luffa cylindrical. The genetic analysis of flesh browning degree in Luffa cylindrical was conducted, which provided a basis for quality improvement of Luffa cylindrical. The six generations （P,, P2, F,, B,, B2 and F2） crossed between ＇YX014＇ （high browning, PI） and ＇LJ-OI＇ （browning-resistant, P2） were use as materials, the mixed major gen ＋ polygene inheritance model was used to analyze the genetic model of browning traits in Luffa cylindrical. The results showed that the optimal genetic model of browning degree in Luffa cylindrical was E- 1 model, which was controlled by two additive-dominant-epitasis major genes ＋ additive-dominant polygenes. The heritability of major gene in the BL, B2 and F2 populations was 81.20%, 72.08% and 0.52%, respectively, and the heritability of polygenes in the B~, B2 and F2 generations was 0. The variance of the environment accounted for 18.8%, 27.92% and 99.48% of the phenotypic variation, respectively. The results indicated that the browning of Luffa cylindrical was dominated by two major genes, and the hereditary effect was the dominant, meanwhile the environment influence was also obvious. The major-gene selection of B1 and B~ generations was high, the selection should be conducted in early generations. In the population improvement of Luffa cylindrical browning, the directional selection or recurrent selection should be used for the light browning single line to improve breeding efficiency.
作者
黄树苹
张敏
谈杰
王春丽
陈霞
张洪源
谈太明
Huang Shuping;Zhang Min;Tan Jie;Wang Chunli;Chen Xia;Zhang Hongyuan;Tan Taiming(Institute of Vegetable,Wuhan Academy of Agricultural Sciences,Wuhan 43034)
出处
《中国农学通报》
2018年第19期50-56,共7页
Chinese Agricultural Science Bulletin
基金
武汉市农科院创新项目"主要大宗蔬菜资源精准鉴定及杂种优势利用研究"(CX201701)
武汉市青年科技晨光计划项目基金"普通丝瓜褐变相关性及遗传规律研究"(201150431080)
关键词
普通丝瓜
褐变
数量性状
主基因+多基因
遗传分析
Luffa cylindrica
browning
quantitative trait
major gene＋ polygene
genetic analysis
作者简介
黄树苹，女，1980年出生，高级农艺师，硕士，主要从事瓜类蔬菜遗传育种研究。通信地址：430345湖北省武汉市黄陂区武湖农业生态园，Teh027—88116321，E—mail：hsping80@163.com。;通讯作者：谈太明，男，1958年出生，湖北武汉人，正高职高级农艺师，大专，主要从事茄果类蔬菜遗传育种。通信地址：430345湖北省武汉市黄陂区武湖农业生态园，Tel：027—88116321，E-mail：tantaiming_001@126com。
