Transferring and seed producing method for head cabbage cytoplasm male sterile line

Abstract

The invention discloses a transferring method for head cabbage cytoplasm male sterile line characterized by that, wild cabbage self-bred lines are utilized for 5-7 generation backcrossing with cabbage cytoplasmic protein sterility source. The advantages of the invention include stabilized male sterility, high sterility strain rate and sterility degree. The crossing rate of the obtained hybrid in strictly isolated area can be as high as 100%.

Description

technical field [0001] The invention relates to the field of utilization of plant heterosis, in particular to a method for the transfer and seed production of a cytoplasmic male sterile line of cabbage. Background technique [0002] Cabbage (Brassica oleracea var. capitata(L.)) is the main vegetable in all countries in the world. Because of its obvious heterosis, breeding of heterosis has become the main way of cabbage breeding. As early as the 1950s and 1960s, developed countries such as Japan and the United States used self-incompatibility lines to prepare cabbage hybrids. my country has also used self-incompatibility lines to produce cabbage hybrids since the 1970s. However, there are problems in this method that the hybridization rate of hybrids is difficult to reach 100%, the long-term self-breeding of the parents of the hybrids tends to degrade the vitality, and the parents rely on artificial bud stage self-pollination and high cost problems, and the use of male steril...

AI Technical Summary

Problems solved by technology

Most of the male sterile lines of radish cytoplasmic cabbage collected by some domestic units are difficult to use because of abnormal plant growth and flowering and fruiting traits

The improved radish cytoplasmic cabbage male sterile lines collected since the mid-1990s, although the plant growth and flowering and fruiting are normal, but the agronomic traits are poor and the uniformity is poor, and they cannot be directly used.