Crops are prepared for sexual interbreeding

are familiar with the structure of flowers and the habits of flowering Different kinds of crops, flower structure and flowering habits are often different.The most important part of a flower for hybrid work is the female and male. Therefore, before hybridization, the shape, number, clutch and location of females and males in hybrid parent flowers should be clearly recognized, and the stinginess can not accurately carry out the work of male, pollination, pollination, bag isolation and so on.Before hybridization, it is also important to understand the flowering habits of hybrid parents. The flowering habits of crops include flowering time, flowering order, pollination method and pollen, column head life force and so on. Understanding parental flowering habits is a job that must be prepared before hybridization. For example, to know when the parents flower, in time to go to male before flowering, to know when is the flowering period, to choose in flowering bloom for pollination, familiar with pollen and column life force, in order to decide to go to male pollination period and so on.

adjust the flowering periodUsed to cross-breed the parent, must spend time to meet, in order to carry out hybridization. Therefore, it is important to understand the various stages of growth and development of hybrid parents before hybridization, in order to regulate the flowering period. There are several main ways to adjust the flowering period.
Phased seeding
is a simple and effective way to adjust the flowering period. Usually based on the mother's flowering period, if the parent's flowering period is too early to delay seeding, too late to sow early. If this is not certain to make the flowering meet, the parent book can be planted in several batches, so that you can choose the most suitable parent flower hybrid.
Lighting Treatment
if the flowering periods of the two parents are too different, you can apply a method to adjust the length of lighting per day to adjust the flowering period. Generally for short-term sun crops such as late rice and soybeans, from the seedling period to the spike before flowering, shorten the daily lighting time, can promote flowering, extend the daily lighting time, can delay flowering. For wheat, rape and other long-term sun crops, longer daily lighting time, can promote flowering, shorten the daily lighting time, can delay flowering.
Spring treatment can
artificial spring treatment, can also be used as a method to adjust the flowering period. For example, for winter and semi-winter wheat, the seed will be sprouted at a low temperature of
0 to 5 degrees C for several days (winter treatment time is 30 to 45 days, half-winter is 10 to 25 days), so that they can complete the development of the spring phase, you can advance spike.
Regulating the temperature of the
for hi-warm relatives can be sown and cultivated in greenhouses or plastic sheds, which can promote flowering. For relatives that require lower temperatures, open-air planting can be used to delay flowering.
Change field management
For precocious parents, more nitrogen fertilizer can be used to delay flowering, for late-ripe parents, more phosphorus fertilizer can be used to promote flowering. In addition, measures such as medium tillage root and irrigation can also be taken to delay the flowering period, which can also play a role in regulating the flowering period.