Cytogenetic Study on the Biostimulation Potential of the Aqueous Fruit Extract of Hippophae rhamnoides for a Sustainable Agricultural Ecosystem

Trajectory analysis and optimization of sea buckthorn fruit vibration separation manipulator based on I-PSO algorithm

In this paper, the optimal time planning of vibration separation trajectory of Hippophae rhamnoides fruit is studied for space manipulator using the I-PSO algorithm. The first step is to analyze the motion of the robotic arm's joints, which are limited in range and speed, in combination with a 3-5-3 polynomial interpolation, an improved Particle swarm optimization with adaptive inertia weight and asynchronous learning factor is proposed, and the specific process is given. Experimental images and data show that the improved particle swarm optimization algorithm can ensure the continuity of joint acceleration and velocity, and the optimal vibration trajectory time is 0.536539094 s Compared with the planned system trajectory time of 0.71022 s, the speed increased by 24.5%. The results of the orthogonal experiment show that the average fruit drop rate reaches 96.19%, which verifies the validity and reliability of the I-PSO algorithm for optimal time planning of seabuckthorn fruit separation vibration trajectory.

Oligo-FISH Can Identify Chromosomes and Distinguish Hippophaë rhamnoides L. Taxa

Oligo-fluorescence in situ hybridization (FISH) facilitates precise chromosome identification and comparative cytogenetic analysis. Detection of autosomal chromosomes of Hippophaë rhamnoides has not been achieved using oligonucleotide sequences. Here, the chromosomes of five H. rhamnoides taxa in the mitotic metaphase and mitotic metaphase to anaphase were detected using the oligo-FISH probes (AG3T3)3, 5S rDNA, and (TTG)6. In total, 24 small chromosomes were clearly observed in the mitotic metaphase (0.89–3.03 μm), whereas 24–48 small chromosomes were observed in the mitotic metaphase to anaphase (0.94–3.10 μm). The signal number and intensity of (AG3T3)3, 5S rDNA, and (TTG)6 in the mitotic metaphase to anaphase chromosomes were nearly consistent with those in the mitotic metaphase chromosomes when the two split chromosomes were integrated as one unit. Of note, 14 chromosomes (there is a high chance that sex chromosomes are included) were exclusively identified by (AG3T3)3, 5S rDNA, and (TTG)6. The other 10 also showed a terminal signal with (AG3T3)3. Moreover, these oligo-probes were able to distinguish one wild H. rhamnoides taxon from four H. rhamnoides taxa. These chromosome identification and taxa differentiation data will help in elucidating visual and elaborate physical mapping and guide breeders’ utilization of wild resources of H. rhamnoides.