Cassava Hermaphrodite Breeding Method

Abstract

The invention discloses a cassava hermaphrodite flower breeding method, which belongs to the technical field of agricultural planting. Including planting, topdressing, secondary topdressing, hormone spraying, nutritional regulation before flowering, pinching, determination of pollen vigor, cross breeding, pollination, selfing gene purification and later management. On the one hand, this breeding method solves the problem of the small number of pollinating female flowers in cassava hybrid breeding, provides more female flowers of different genotypes, and improves the efficiency of hybrid breeding; Cross-line gene purification method. In cassava breeding technology, it is the first time to induce the formation of hermaphroditic flowers, and use hermaphrodisiac flowers for hybrid breeding, creating a new method of hybrid breeding, and creating a new world for cassava hybrids.

Description

technical field [0001] The invention relates to the technical field of agricultural planting, in particular to a cassava hermaphrodite flower breeding method. Background technique [0002] Cassava (Manihot esculenta Crant), also known as cassava, is a plant of the genus Manihot in the Euphorbiaceae family (Euporbiaceae). Born at the top, the female flowers are on the lower part of the pedicel. The pistil is nearly oval and lantern-shaped, long and pointed, larger than the male flower in length and width, without cracks, 5 calyx, ovary with three chambers, stigma three-lobed, ovary green, like a cockscomb, with dense juice at the base, attracting insects pollination. Stamens are nearly round and lantern-shaped, without corolla, with 10 stamens. [0003] Cross-breeding is the method of crossing different populations and individuals of different genotypes, and selecting the desired varieties (lines) from their hybrid offspring. Hybridization can recombine the genes of the p...

AI Technical Summary

Problems solved by technology

Cassava is a cross-pollination crop, and the male and female flowers of the same inflorescence are spaced apart to avoid it; moreover, the cross-pollination rate of cassava is low. According to the test report of domestic cassava breeding expert Li Kaimian, the general cross-pollination rate of cassava is 26-30%; according to Guangxi Wang Zongyi reported that the fruiting rate of cassava is also very low, generally 5-20% under natural conditions; these factors restrict the hybrid breeding of cassava in my country, and the research on new hybrid breeding methods is imminent