How to differentiate broad bean varieties

How to differentiate broad bean varieties

Broad bean varieties are susceptible to variation and degradation during continuous planting. Although faba bean self-pollination, but due to bees and other insect pollination, out-crossing rate is often 20% to 30?, so faba bean is a constant cross-pollination (often outliers) crops. Therefore, the broad bean variability during planting year after year is so rapid that if a good seed cannot be properly selected and kept for three years, it will lose its use value in production. Therefore, the broad bean must be selected and preserved every year, purification and rejuvenation, improve the purity of seeds, and maintain the varieties of good traits. Seed seeding requires quality identification of the seed, and quality identification requires the use of seed counting instrument, seed clarity indicator, seed germination box, and Tian equality instrument. They are used to determine seed weight, seed purity, and Seed germination rate and other parameters.

Planting areas with appropriate spatial separation are used as a reserved area around the hills. If there are two or more varieties around the planting hills, then the distance between the blocks cultivated for each species is 300 to 500 meters apart; if not, then It cannot be used as a planting hill in order to minimize the purity of the improved seeds due to pollination by insects. If it is not space segregation, it can be barrier isolation, that is, a few rows of tall straw crops are planted between the two varieties, or rape can be grown between the two varieties at the same time as broad bean.

The yield of broad bean selection, selection, and grain selection was composed of four factors: number of effective branches, number of pods per plant, grain number per pod, and grain weight. In planting land, the first choice is to select individual plants that are disease-free and effectively branched in the field. Generally, 400-500 strains of plants must be selected for use in 1 mu of land. After picking out the mid-lower part of the preferred plant, pick out the earthworm which is full and has more than two grains of each grain. The grain is selected from the selected grains and the desired seeds are selected. When selecting the seeds, we must select seeds with good maturity, fullness, no spots, no wormholes, seed coat color and normal grain shape (seed coat color and grain shape of this species). If there is more than one species reserved, it must be marked in the process of strain selection, selection, grain selection and storage to avoid confusion.

In addition to variation in the purity of the seed, variation in the single harvest, single drying, single storage broad bean in addition to cross-pollination also occurs due to mixing during harvesting, threshing, and transportation. Therefore, in order to protect the purity and species of a fine variety, it is necessary to carry out purification and rejuvenation. Avoid artificial mixing, single collection, single release, single drying and single storage for each variety.