Bisexual flower breeding method of manihot esculenta grant

Abstract

The invention discloses a bisexual flower breeding method of manihot esculenta grant, and belongs to the technical field of agricultural cultivation. The breeding method comprises steps as follows: planting, top application, secondary top application, hormone spraying, nutritional regulation before flowering, pinching, pollen viability determination, crossbreeding, pollination, selfing isogeneity and final-period management. With the adoption of the breeding method, on the one hand, the problem of the small quantity of pollinating female flowers during crossbreeding of manihot esculenta grant is solved, more female flowers with different genotypes are provided, and the crossbreeding efficiency is improved; on the other hand, the bisexual flower of manihot esculenta grant is discovered for the first time, and an effective isogenic method adopting a manihot esculenta grant inbred line is provided; and further, the bisexual flower is formed through induction for the first time in the manihot esculenta grant breeding technology, the bisexual flower is used for crossbreeding, a novel crossbreeding method is created, and a new field is created for manihot esculenta grant 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 ...

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