Hybrid Seed Production of Brassica napus L.: Isolation Effect Comparisons of Different-density Nets

doi:10.11923/j.issn.2095-4050.cjas20200300052

Abstract

Abstract:

The objective of this study is to investigate the effect of nylon net density on seed production of Brassica napus L. Polima cytoplasmic male sterile (Polima CMS) line and a radish cytoplasmic male sterile (Ogu CMS) line of Brassica napus L. were used as materials. The effects of nets on the light, temperature, humidity, the incidence of Scleritinia sclerotiorum and seed-production yield were investigated. The results were as following. (1) Light intensities in the nets decreased significantly along with the increase of net densities. (2) The temperature in all nets raised, but some of the temperature increase did not reach a significant level. (3) Humidity in most nets increased with the increase of net density, but there were some exceptions. (4) The incidence of Scleritinia sclerotiorum increased with the increase of net density. (5) Even the densest net (160 net mesh number per square inch (NMNPSI)) could not prevent outside pollens entering into the nets. (6) Of the same density nets, the decrease rate of hybrid yield of Polima CMS lines was similar to that of Ogu CMS lines. Consequently, the effects of net density on both Polima CMS and Ogu CMS are similar, the present popular densities of nets are not enough to prevent outside pollens entering into nets.

Key words: Brassica napus L., Seed Production, Nylon Net, Density, Isolation Effect

CLC Number:

S565.4

WEN Yancheng, ZHANG Shufen, HE Junping, CAI Dongfang, ZHU Jiacheng, WANG Jianping, CAO Jinhua, HU Kun, ZHAO Lei, WANG Dongguo. Hybrid Seed Production of Brassica napus L.: Isolation Effect Comparisons of Different-density Nets[J]. Journal of Agriculture, 2021, 11(12): 68-73.

Figures/Tables 5

References 25

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