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Pollination dynamics in a Platycladus orientalis seed orchard as revealed by partial pedigree reconstruction

Huang, Li-Sha, Song, Jiayin, Sun, Yan-Qiang, Gao, Qiong, Jiao, Si-Qian, Zhou, Shan-Shan, Jin, Yuqing, Yang, Xiao-Lei, Zhu, Ji-Jun, Gao, Fu-Ling, El-Kassaby, Yousry A., Mao, Jian-Feng
Canadian journal of forest research 2018 v.48 no.8 pp. 952-957
Platycladus orientalis, alleles, chloroplasts, crops, energy, genetic improvement, genetic variation, males, microsatellite repeats, outcrossing, parents, pedigree, pollen, pollination, reproductive success, seed orchards, seeds
Pollination dynamics was studied in a first-generation Platycladus orientalis (L.) Franco seed orchard with pedigree reconstruction using eight nuclear and four chloroplast SSRs. The pedigree reconstruction assigned 371 of 448 studied seeds to one of the orchard’s 192 candidate male parents and showed a high level of outcrossing and pollen contamination in the orchard’s seed crop. While the orchard’s seed population showed greater allelic richness compared with the parental population, a few alleles present in the parental population were missing in the seed crop. Additionally, we detected no significant correlation between male reproductive energy (pollen yield) and male reproductive success; however, uneven parental contribution was also observed. Pollen management practices were recommended to ensure the maintenance of genetic diversity in the seed crops and increase in genetic gain.