No matter how good the wheat variety is, it is also said that it is highly productive - because, the company of this variety wants to "make a profit", and the dealers of this variety want to "make money", and they do not think about the interests of the growers at all.
Moreover, good varieties are always scarce.
It's like "the big waves sweep the sand (remove the dirt), and the sand pans for gold (and then the sand)" - gold is always scarce, and the gold-like wheat varieties account for at most 1%, or even "2 thousandths".
The most basic common sense, but it is the most easily overlooked
Resistance is yield.
But all breeders, seed companies, and dealers who have some basic conscience will value the weight of this sentence.
What do you think: wheat grains are "black and small", wheat "withered white ears" are all over the ground, wheat is "highly susceptible to rust", wheat is late and does not resist dry and hot wind (low 1000-grain weight and bulk density is less than 820 g/L), wheat is not drought resistant, at least any of these 5 defects, no matter how "hard" you are, it is in vain, and in the end it is difficult to escape the fact that the yield will be reduced.
1) Wheat varieties should not have "black and small grains".
This is caused by two defects: [underdeveloped root system] and [poor disease resistance]. It is better to have an approved 1000-grain weight of more than 44.5 grams + an approved bulk density of 820 grams / liter or more.
2) Wheat varieties should not be "withered and white" all over the ground.
Because one or more of the 4 diseases of rhizome rot disease are caused, even the [dwarf stalk variety] is also seriously lodging - on the contrary, the "medium straw" is more resistant to lodging, and even the tall stalk variety is nothing more than 2 yuan paclobutrazol to prevent lodging, but the resistance to "withered white spike" is the most important. Once the "withered white ears" are serious, the yield will be reduced by at least 200 catties.
3) Wheat varieties: can not be "highly susceptible to rust".
The first-class variety is "resistant to double rust", the second-class variety is "resistant to one type of rust", the third-class variety is "moderately susceptible to rust", the fourth-class variety is "highly susceptible to one rust", and the fifth-class variety is "highly susceptible to two types of rust".
4) Wheat varieties: do not mature late, avoid dry and hot air.
It is not resistant to dry and hot wind, and the loss of one mu is at least a few hundred catties. The more late-maturing varieties are, the more susceptible to hot and dry winds (small grains, low 1000-grain weight, low bulk density), very severe yield reduction, and even hail and extinction.
5) Wheat varieties: not drought resistant, no.
Wheat varieties are drought resistant, all in the [well-developed root system].
The root system is developed, the mu is more spikes + 1000 grains are high (large grains), easy to have high yield (the developed root system goes to the deep soil to absorb and utilize nutrients and water), and it is also more resistant to lodging and frost (many winter wheat varieties are "seriously frost damaged" because they are not drought resistant, which is the reason for the underdevelopment of the root system), more resistant to rhizome rot diseases, and more resistant to dry and hot winds.
After a multi-faceted investigation by the @北Rural Network Science and Technology Advisory Group, wheat varieties are best bred by the regular Academy of Agricultural Sciences, such as "Baoyan 12" bred by the Baoji Academy of Agricultural Sciences, and "Shimai 32" bred by the Shijiazhuang Academy of Agricultural Sciences, which are far more reliable than some flickering seed companies boasting of dwarf stalks and large spikes.
Other shortcomings are "not considered shortcomings" compared to the above five aspects
It is impossible for any wheat variety to "resist everything", but the Chinese nation has a great wisdom:
The lesser of two evils.
1) High susceptibility to scab = resistance to "withered white ears".
This is the scientific research result of Zheng Hongyuan, a teacher from Henan Agricultural University. In addition, scab is an "occasional disease" - it only occurs when it rains during the flowering period, and it does not occur for any variety without rain during the flowering period. However, wheat should be sprayed with insecticides to prevent suckers and aphids before flowering, and it is nothing more than adding a few yuan of fungicides to prevent scab. However, how much does it cost you to have an effect?!
2) Medium straw is best.
Because the straw is short, the biggest defects are "thin plant cell wall (poor disease resistance)] and "underdeveloped root system (if the root system is developed, the straw will definitely not be "too short)]. Therefore, the approved plant height of 75 cm to 80 cm is the best, which can take into account the harmony between resistance and "high biological yield = high grain yield".
3) Powdery mildew is not highly susceptible and acceptable.
In other words, when the prevention is a sap sucker, the "ancient fungicide" to prevent scab can also treat powdery mildew.
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