Phenotypic variations and heritability of bearded iris breeding
Phenotypic variations and heritability of bearded iris breeding
复制标题
DOI：
10.1007/s10681-017-2046-6
复制
发表时间：
2017-10
期刊：
影响因子：
1.9
通讯作者：
Z. Fan;Yike Gao;Yanchao Guo;Rong Liu;Qixiang Zhang
中科院分区：
文献类型：
--
作者：
Z. Fan;Yike Gao;Yanchao Guo;Rong Liu;Qixiang Zhang
须鸢尾（Iris× hybrida Hort.）指的是大量的虹膜杂交种，这是确定的厚，浓密的“胡子”的每一个福尔斯（较低的花瓣）的花朵。然而，虹膜的选择是非常有限的，由于缺乏有关基因型和表型的信息。采用北卡罗来纳州设计Ⅱ（NC Ⅱ）估计配合力、遗传方差分量和遗传力的统计方法，以7个父本和2个母本进行杂交，获得14个杂交一代群体。每个F1家系通过3年的人工授粉产生，包括60个个体。对株高、叶长、花柄花数、单花高、花径、花长和花宽等11个关键观赏性状进行了测定，并对杂种优势、杂种优势、配合力、遗传力和遗传相关进行了分析。结果表明，HF和LW的F1群体获得杂种优势的数量最多，因而更容易产生花大花高的后代。对梳理力的估计结果表明，Ⅰ.白色和蓝色“（M1）和I.”糖蓝（M5）是理想的花粉供体。I.“印度酋长' ×I.'“香槟优雅”（FM 1 × M6）在所有性状上均表现出正的特殊配合力（SCA），是最有潜力的群体。宽、窄遗传力分别为91.47%和53.96%。相关分析表明，PH与NBS和NFS密切相关，LL与HF和LF显著相关，这为在营养生长阶段选择较高个体获得花量丰富的个体提供了可能。
Bearded iris (Iris× hybrida Hort.) refers to the large population of iris hybrids, which is identified by thick, bushy ‘beards’ on each falls (lower petals) of the blossoms. However, the selection of iris is extremely limited due to the lack of information about genotype and phenotype. According to North Carolina Design II (NC II), a statistical method to estimate the combining ability, genetic variance components and heritability, seven male parents and two female parents were hybridized to generate 14 populations of first filial generation (F1). Each F1family was generated through artificial pollination in 3 years and included 60 individuals. 11 key ornamental characters, including plant height (PH), length of leaf (LL), number of flower per scape (NFS), height of individual flower (HF), diameter of flower (DF), length of fall (LF) and width of fall (WF), were measured, and some genetic parameters (heterosis, heterobeltiosis, combining ability, heritability as well as genetic correlations) were evaluated. The results showed that HF and LW had the largest number of F1populations gaining heterosis, thus more likely to generate taller progenies with larger blossoms. The estimates of combing ability revealed thatI.‘White and Blue’(M1) andI.‘Sugar Blues’(M5) appeared to be ideal pollen donators. The combination ofI.‘India Chief’ ×I.‘Champagne Elegance’ (FM1 × M6) exhibited positive special combining ability (SCA) on all the tested characters, becoming the most potential populations of all. WF and NFS had the highest broad-sense heritability (91.47%) and strict-sense heritability (53.96%), respectively. Correlation analysis showed that PH was closely associated with NBS and NFS, while LL had significant correlations with HF and LF, making it possible to select taller individuals in the vegetative stage to obtain those with abundant flowers.