Study On Breeding Pattern Of Quick And Effect In Wheat

Wheat is one of the major grain crop in our country. It has the role of act enough importance in the aspect of raising the people's living standard and ensuring national stable solidarity. Wheat breeding is a mainly via to raise wheat yield, quality and adaptiveniss. It has undoubtedly positive promote role for raising the wheat production of our country that develops breeding technical research of wheat. This paper will show a new breeding technology that was integrated by wheat cultivation in greenhouse with anther and young embryo culture technologies .It makes wheat breeding from creating variation to steady variation consummately in one year, and rise breeding efficiency. Getting the result mainly as follows:1. The wheat haploid plantlets from anther culture were of theoretical and applied interest. Induced haploid spirophytes may play a key role, not only in increasing the efficiency of breeding programs by producing pure lines rapidly, but also in the elucidation of fundamental genetics. However large numbers of experiments turned out that there are many problems with low rate of green plantlet from anther culture, difficulties of saving plantlets pass through summer, low rate of double chromosome, extrusive contradiction between technique of wheat anther culture and variety improvement. So wheat anther culture have not played a role in wheat breeding. Studies were carried out on the relationship between the breeding efficiency of anther culture and the use of different hybrid generations as anther-donors plants in wheat. It was shown that previously the low breeding efficiency of anther culture in wheat cross breeding was mainly due to the use of F₁ as anther-donors. Experimental results demonstrated that the breeding efficiency of anther culture in F₁ generation was very low, especially when presently the doubled haploid population was usually very small. Based on the experimental results as well as the theoretical analysis this paper proposes that use of F₂ or F₃ (especially F₃) as anther-donors in combination with the conventional selection in the fields will increase the breeding efficiency of anther culture. Under the guidance of this proposal 2 wheat varieties have been developed within 5～7years through anther culture.2. Growth of the wheat embryo from ovule,About 7 days after pollination, generally, a...