Yu Fu-Lai, Zhao Zhi-Gang, Wang Wen-Quan, Hou Jun-Ling, Wang Dan, Pang Yu-Xin
Zhong Yao Cai. 2013 Oct;36(10):1551-5.
To evaluate genetic potential and selection index of yield-related traits in 2-year-old populations, and provide a basis for high-yield breeding of licorice (Glycyrrhiza uralensis).
Four genotype licorice populations were transplanting in four different environment using complete randomized block design with three replication, and the 10 yield-related traits, including plant height (PH), stem diameter (SD), tiller number (TN), taproot length (TRL), root length (RL), root diameter (RD), diameter of 20 cm below the root head (D20), taperingness (TR), lateral root number (LRN) and root fresh weight (RFW) were measured in field. Genetic potential and selection index of yield-related traits were evaluated using theories of quantitative genetics.
The genetic potential were higher for the three traits of PH (X1), TRL (X4) and RL (X5) that showed through genetic parameter of broad sense heritability (h2), genetic variation coefficient (GCV) and relative genetic advance (RGA). Among them, selection relative value increased by 45.94% through combination of PH and RL (Y1 = 0.21X1 + 0.08X5) compared with the direct selection for RFW (Y1).
It can realize effective indirectly selection for yield traits, RFW of licorice by PH and RL or their combination. That is, for selection of high-yield licorice, select big and high plants firstly, and then single out long root length materials.
评估2年生甘草群体产量相关性状的遗传潜力和选择指数，为甘草高产育种提供依据。
采用完全随机区组设计，将4个基因型甘草群体移栽到4种不同环境中，重复3次，在田间测定包括株高（PH）、茎粗（SD）、分蘖数（TN）、主根长（TRL）、根长（RL）、根直径（RD）、根茎以下20 cm处直径（D20）、根的尖削度（TR）、侧根数（LRN）和根鲜重（RFW）在内的10个产量相关性状。利用数量遗传学理论评估产量相关性状的遗传潜力和选择指数。
通过广义遗传力（h2）、遗传变异系数（GCV）和相对遗传进展（RGA）等遗传参数表明，株高（X1）、主根长（X4）和根长（X5）这3个性状的遗传潜力较高。其中，通过株高和根长的组合（Y1 = 0.21X1 + 0.08X5）进行选择的相对值比直接选择根鲜重（Y1）提高了45.94%。
通过株高和根长或其组合可以实现对甘草产量性状根鲜重的有效间接选择。即对于高产甘草的选择，首先选择高大植株，然后挑选根长的材料。
