Breeding method of close-planting-resistant high-yield cabbage type rape hybrid varieties and application of obtained rape hybrid varieties

• Main Authors: CHEN WEIJIANG, QU LIANG, LI MEI, WANG TONGHUA, FAN LIANYI, DENG LICHAO, HUI RONGKUI
• Format: Patent
• Language: Chinese; English
• Published: 12.10.2016
• Subjects: AGRICULTURE; ANIMAL HUSBANDRY; CULTIVATION OF VEGETABLES, FLOWERS, RICE, FRUIT, VINES, HOPSOR SEAWEED; FISHING; FORESTRY; HORTICULTURE; HUMAN NECESSITIES; HUNTING; NEW PLANTS OR PROCESSES FOR OBTAINING THEM; PLANT REPRODUCTION BY TISSUE CULTURE TECHNIQUES; TRAPPING; WATERING

The invention provides a breeding method of close-planting-resistant high-yield cabbage type rape hybrid varieties. The breeding method includes the following steps that existing n1 cabbage type hybrid rape sterile lines and n2 cabbage type rape restoring lines are used for incomplete diallel cross, and F1-generation hybrids are obtained; the F1-generation hybrids are subjected to a field randomized block multiplicating variety comparison cultivation test, obtained test varieties are subjected to grain yield measurement, and high-yield varieties with the yield increased by 5% or above are screened out; the obtained test varieties are subjected to harvest index measurement, and high-harvest-index varieties with the harvest indexes being 3.0 or above are screened out; the varieties meeting the yield increase and harvest index requirements at the same time are determined as high-yield cabbage type rape hybrid varieties; finally the F1-generation hybrids corresponding to the varieties are subjected to high-densit