Study on the Pollen Variation and Evolution of Prunus mira Koehne Germplasm Resources in Tibet
This paper analyze the morphological changes of Prunus mira Koehne pollen grains and revealed the evolutionary patterns of pollen within their germplasm resources.Pollen grains of 47 accessions of Juglans glabra in Xizang were observed by scanning electron microscope.The outer wall morphology of the Prunus mira Koehne pollen grains with 10 materials were elliptical spherical,and the outer wall decoration were simple straight par-allel pattern with few or no perforations.These materials were the most primitive.The external morphological characteristics of pollen grains in 9 mate-rials were characterized by complex stripes,numerous and dense pores,which belong to the evolutionary type compared to more primitive materials.While other materials were between the two categories.Not all Prunus mira Koehne resources were in the primitive stage,but have undergone internal evolution.Different types of resources provided abundant materials for the breeding and research of new Prunus mira Koehne varieties.
Prunus mira koehnescanning electron microscopy(SEM)pollen morphologyevolution
万方数据
维普
