The Main Investigative Traits for Comparing and Screening of Wheatlines

Answer 1

The main traits of the wheat lines were as follows:
1. ** Lodging resistance **: When the population is large, the individual is relatively weak, which is manifested by the poor lodging resistance of wheat fields with thin stems, untidy wheat legs, increased plant height and longer first internode at the base of the stem. If the field is not lodging, the varieties with thick stems, neat wheat legs and relatively low plant height have strong lodging resistance and are not sensitive to the response of the population.
2. ** Traits of wheat **:
- ** length and number of spikelet **: The abnormal temperature in spring will affect the development of wheat ears. The varieties with similar length and number of spikelet should be selected. By selecting 10 representative wheat ears in the field, measuring the ear length and counting the number of spikelet to take the average value, and then comparing it with the value announced at the time of approval, the young ear division of varieties with small differences would be less affected.
- ** Number of grains per ear **: Due to frost and other factors, the number of grains per ear may be reduced. The variety with a small difference from the normal year is better, because it is difficult to achieve high yield with less grains per ear.
3. ** Disease Resistance **: Large population, poor ventilation and light transmission, high humidity in the field, and it is easy to get sick when the temperature rises due to low temperature and sudden sunny rain. Go deep into the wheat field and open the plants to check the lower part of the disease. Under such harsh conditions, the varieties that are not susceptible can be regarded as resistant varieties.
4. ** Root vitality **: A variety with vigorous root vitality has strong resistance to stress, strong resistance to dry hot wind and diseases in the later stage, and good yellowing when the wheat matures. Poor root vitality will cause the leaves of the wheat field to wither. It can be judged by pulling the plant apart to check the color of the stem near the ground (normal green means that the root system is more vigorous) or pulling the plant out to check the root system.
5. ** Plant Traits **:
- ** Stems **: Including height, thickness, color, toughness, etc.
- ** Leaf **: such as leaf width, leaf color, leaf sheath wax powder, leaf position (vertical or loose).
6. ** Ear Trait **:
- ** Spike shape **: There are rod shape, long shape, spindle-shaped, oval shape, etc.
- ** Ear length **: 8.5cm and above are long ears;6.5 - 8.5cm are medium ears;6.5cm and below are short ears.
- ** density **: relatively stable, expressed by the number of spikelet within the 10cm ear shaft. It is divided into four levels: sparse (D < 22), medium (D is 22 - 28), dense (D is 28 - 34), and extremely dense (D is above 34).
- ** Ear color **: Generally, there are two types of red shells and white shells. The red shells have different shades.
7. * * Ray's Character **:
- ** Awn length **: divided into long awn (awn longer than ear length), medium awn (awn equal to or slightly shorter than ear length), short awn or half awn (awn length is significantly shorter than ear length), no awn (including top awn and no awn, top awn refers to awn length equal to outer glume or upper spikelet awn length about 2 - 3cm).
- ** The distribution of the awn is divided into parallel shape, wide fan shape, and narrow fan shape.
- ** Light color **.

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