With field experiment and large-scale practice on hybrid production in cotton SCRC15 by hand crossing, seed yield formation and production efficiency were comparatively studied in various Shandong cotton growing area.
④Optimum flowering time for hybrid production of Pearl millet × Napier grass was last ten days in August, so sowing time for sterility line Pearl millet Tift23A on first and tenth in June, and Napier grass N51 should be on 15, July and with short-day treatment. It can be obtained flowering time agreement.
There were 17 kinds of nuclear male-sterile lines that were developed through different methods including selecting from mutants, artificial induction, genetic improvement and creating by biological technique. With male sterility (ms14 and ms5ms6) applied to cotton breeding, 28 hybrid varieties were bred in China.
Among fertility factors of leading to yield increase in the process of producing hybrid maize seeds, the contribution of basic soil fertility to yield accounts for 40%, and contribution of fertilizer accounts for 60%.
1. High-yield breeding technique with artificial castration and pollination in W8225The hybrid cotton yield was affected by many factors, especially the planting date, planting density, amount of fertilizers (urea), beginning pollination date, finishing pollination date, etc.
medium that developed in the field, indicating that the elevated temperature caused greater hybrid seed production than was observed in our earlier studies.
Selection on the basis of the codominant Prx-21 allele should allow for more rapid and efficient transfer of the recessive male sterile allele into an array of genetic backgrounds, thus promoting its use in hybrid seed production.
A new method for hybrid seed production based on cytoplasmic male sterility combined with a lethal gene and a female sterile pol
A new improved method for hybrid seed production was successfully tested.
The female sterile pollenizer provides a permanent abundant flowering with excess of pollen grains that leads to increased hybrid seed production without additional labour expenses.
The frequency of somatic hybrid production was comparable to that previously established for two sexually compatible Petunia species.
inflata is possibly due to the stringent selection used for somatic hybrid production.
In the case of cytoplasmic male sterility-based hybrid production systems, ubiquity of sterility-inducing cytoplasm in derived hybrids warrants thorough characterization of its influence on plant phenotype.
The average rate of F1 hybrid production (seed setting rateXgermination rate) following an ordinary method of crossing is only 0.09%, whereas this rate is increased to 3.1% by use of embryo culture.
The first backcross of the F1 plants with triticale pollen is again difficult, the hybrid production being 0.9%.