Breeding and extension of Pseudostellaria heterophylla new variety "Shitai No.1" in Guizhou province / 中国中药杂志

Based on collections and researches of Pesudostellaria heterophylla germplasm resources from different areas of China, by using Shibing SB-4 provenance as materials, the new variety "Shitai No.1" was bred by mass selection, small plot variety comparative test, regional variety comparative test and field trial planting. Compared with "Qian taizishen No.1" and P. heterophylla land races. The disease and lodging resistance, root yield, polysaccharide content and the first grade rate of "Shitai No.1" have obvious advantages. In addition, it is relatively stable of yield in "Shitai No.1" in different places. It is demonstrated that "Shitai No.1" is a fine variety that adapt to the producing areas of P. heterophylla in Guizhou province, it is worthy to be promoted.

Breeding on eight strains of Pseudostellaria heterophylla based on phenotypic traits and quality in Guizhou province / 中国中药杂志

<p><b>OBJECTIVE</b>To provide new germplasm materials for breeding new varieties of Pseudostellaria heterophylla.</p><p><b>METHOD</b>The method of single plant selection was adopted, with the comparative experiments being carried out under the same conditions in Shibing county. The 8 plants of Shibing SB-4 were compared respectively with factor analysis for 27 phenotypic traits and 8 yield traits, and single factor variance analysis for the contents of polysaccharides.</p><p><b>RESULT</b>Using factor analysis, 27 phenotypic traits were classified into 7 principal divisors and 8 yield traits were simplified into 3 principal divisors. The 4 strains of P. heterophylla, ZT-01, ZT-02, ZT-06 and ZT-07, performed better than others in the phenotypic traits, and ZT-01, ZT-02, ZT-03 and ZT-07 in the yield traits. The contents of polysaccharides of ZT-01, ZT-02, ZT-05 and ZT-08 showed significantly higher value.</p><p><b>CONCLUSION</b>There is significant difference among the 8 strains of P. heterophylla in phenotypic traits, yield traits and quality traits, making it possible to select certain strains for different purposes. ZT-01 and ZT-02 can be breaded further. ZT-06 and ZT-07 were used as ornamental cultivars for its great phenotypic traits. ZT-03 with good resistance and high yield was taken as resistant variety, and ZT-05 would face next selection on the basis of its high content of polysaccharide.</p>

Study on seed quality test and quality standard of Pesudostellaria heterophylla / 中国中药杂志

Referring to the rules for agricultural seed testing (GB /T 3543-1995) issued by China, the test of sampling, seed purity, weight per 1 000 seeds, seed moisture, seed viability and germination rate had been studied for screening seed quality test methods of Pesudostellaria heterophylla. The seed quality from different collection areas was measured. The results showed that at least 6.5 g seeds should be sampled and passed through 10-mesh sieve for purity analysis. The weight of 1 000 seeds was determined by using the 500-seed method. The phenotypic observation and size measurement were used for authenticity testing. The seed moisture was determined under the higher temperature (130 ± 2) degrees C for 5 hours. The seeds were dipped into 0.2% TTC sustaining 1 hour at 40 degrees C, then the viability could be determined. The break dormancy seeds were cultured on sand at 10 degrees C. K cluster analysis was applied for the data analysis, the seed quality from different collection areas grading of P. Heterophylla was described as three grades. The seed quality of each grade should reach following requirements: for first grade seeds, germination rate ≥ 86%, 1 000-grain weight ≥ 2.59 g, purity ≥ 87%, moisture ≤ 13.1%; for second grade seeds, germination rate ≥ 70%, 1 000-grain weight ≥ 2.40 g, purity ≥ 77%, moisture ≤ 14.3%; for third grade seeds, germination rate ≥ 41%, 1 000-grain weight ≥ 2.29 g, purity ≥ 76%, moisture ≤ 15.8%. The seed testing methods for quality items of P. heterophylla had been initially established, as well as the primary P. heterophylla seed quality classification standard.

Comparative analysis of main agronomic traits and interrelationships in cultivation provenances of Pesudostellaria heterophylla from Guizhou province / 中国中药杂志

<p><b>OBJECTIVE</b>To provide guidance for selection and breeding of Pesudostellaria heterophylla, agronomic traits of 3 mainly cultivated form of P. heterophylla were observed and compared in Guizhou shibing.</p><p><b>METHOD</b>Thirteen agronomic traits of P. heterophylla from 3 cultivation form were measured and the traits were analyzed using multiple comparison, correlation analysis, multiple stepwise regression analysis and path analysis.</p><p><b>RESULT</b>The results showed that agronomic traits were different in 3 cultivation form, significant(P <0.05)or very significant correlated (P <0.01)among multiple agronomic traits, the width and the number of root, the first branch number, cleistogamous flowers, length and width of leaves, and the aboveground biomass were the main factors that affected the underground biomass, and the number of root, the aboveground biomass had a directly positive effect on the underground biomass. Meanwhile, whole length, length and width of leaves, cleistogamous flowers etc. had direct or indirect effect on the underground biomass.</p><p><b>CONCLUSION</b>Aboveground biomass would be as the best indirect selection traits on breeding high yield of P. heterophylla, the first branch number, width of leaves and cleistogamous flowers world be as a better auxiliary index on breeding high variety of P. heterophylla.</p>