In 2010, the corn variety Ludan 818 was approved

This variety is characterized by dense tolerance, lodging resistance, and high yield, which is worth promoting.

Approval No.: Lu Nong Review No. 2010005 Approval Opinions: Planting and utilization as summer maize varieties in suitable areas of the province.

A generation of hybrids with the combination QX508 QXH0121. The female parent QX508 is 295M Zheng 58 Zheng 58 was used as the basic material to be bred by drug-induced parthenogenesis, and the male parent QXH0121 was selected with LX9801 as the core and K12, Ji 853 and Wu 314 as the core to form a small group.

Characteristics: compact plant type, the number of leaves in the whole plant is 20-21, the seedling leaf sheath is purple, the filaments are red, and the anthers are blue. Regional test results:

The growth period of summer sowing was 104 days, the plant height was 274 cm, the ear position was 109 cm, the lodging rate was reversed, the most serious disease level of large spot and rust was 7, the most severe disease rate of stem rot was the most severe disease rate of coarse shrinkage disease, and the disease rate of the pilot plant was the most severe disease rate of coarse shrinkage disease. The fruit spike is cylindrical, the cob is red, the spike length is cm, the spike thickness is cm, the bald cm is cm, the number of spike rows is average, the number of grains per spike is 494, the grain is yellow, semi-dentate, the seed yield, the weight of 1000 grains is 356 grams, and the bulk weight is 716 grams. In 2008, it was identified by the Institute of Plant Protection of Hebei Academy of Agriculture and Forestry Sciences: medium resistance to small spot disease, susceptibility to large spot disease and Curvularia leaf spot, high resistance to stem rot, resistance to tumor powdery mildew, and high resistance to dwarf mosaic disease.

In 2008, the quality analysis of the Grain Quality Supervision, Inspection and Testing Center (Tai'an) of the Ministry of Agriculture: crude protein content, crude fat, lysine, crude starch. Production performance:

In the 2007-2009 regional test of summer maize varieties in the province, 37 pilot projects increased the yield by 26 points and reduced the yield by 11 points in three years, and the average yield per mu was kg, which was higher than that of the control Zhengdan 958. In 2009, the average yield per mu in the production test was higher than that of the control Zhengdan 958.

Key points of cultivation technology: the suitable density is 5000 plants per mu. Other management measures are the same as those in general Daejeon.

Compact plant shape: Ludan 9088 corn has a compact plant shape and yellow grain color. Disease Resistant:

Medium resistance to large spot disease, small spot disease, sheath blight, etc. Yield cluster performance: In the 2010-2011 regional experiment of maize varieties in southeast China, the average yield per mu was kilogram in two years.

Planting points: The planting density per mu is 3500-4000 plants.

1. The plant shape is compact

The plant height of Ludan 9088 corn is about 224 cm, the plant type is compact, the ear position is 74 cm, the seedling leaf sheath is purple, the leaves are green, the anthers are light red, the filaments are red, the ear makes Zheng oak cylindrical, the ear length is about cm, and the grain color is yellow.

2. Strong disease resistance

According to the results of disease resistance inoculation identification, Ludan 9088 corn is resistant to large spot disease, small spot disease, tanbian sheath blight and stem rot, and is highly susceptible to corn borer, which is suitable for planting in central and southern Jiangsu, southern Anhui, Zhejiang, Jiangxi, Fujian and other places.

3. Yield performance

In 2010-2011, Ludan 9088 corn participated in the regional test of southeast corn varieties, with an average yield of kilograms per mu for two years, compared with Nongda 108, the yield increased, and in the 2011 production test, the average yield per mu was 489 kg, compared with Nongda 108, the yield increased.

4. Key points of planting

Ludan 9088 corn is generally planted at the end of March to mid-to-late April every year, and the planting density per mu is 3500-4000 plants.

<> Ludan 9088 plant height is 224cm, compact plant type, the number of adult leaves is 20, the seedling leaf sheath is purple, green leaves and leaf margins, cylindrical fruit spikes, red cobs, spike length, the number of spike rows is 12-14 rows, yellow grains and the shape is semi-dentate, 100 grain weight, grain bulk weight is 712g l, crude protein content is, high susceptibility corn borer. In the 2010-2011 regional trial of maize varieties in the southeast, the average yield per mu was two years), and the yield increased compared with the control variety Nongda 108.

1. Characteristics

1. Features. 1) The plant height of Ludan 9088 is 224cm, the plant type is compact, the ear position is 74cm, and the number of adult leaves is 20, in the southeast region, the variety generally takes 105 days from seedling emergence to maturity, which is 3 days earlier than the control variety Nongda 108.

2) The color of the leaf sheath of the seedling is purple, the leaf color is green, the leaf margin color is green, the anther color is light red, the color of the glume shell is light purple, and the color of the filament is red.

3) The fruit spike of this variety is cylindrical, the spike length is, the number of spike rows is 12-14 rows, the color of the spike is red, the color of the grain is yellow, the shape is semi-dentate, and the weight of 100 grains is.

2. Disease resistance and quality testing.

1) According to the results of disease resistance inoculation identification, this variety is resistant to small spot disease, large spot disease, sheath blight and stem rot, and has a high susceptibility to corn borer.

2) According to the quality test results, the grain bulk density of this variety was 712g l, the crude protein content was crude fat content, the crude starch content was 69%, and the lysine content was 69%.

Second, the output

1. Regional test of maize varieties in southeast China.

From 2010 to 2011, the regional test of the southeast corn variety of vertical potato was added to the ginseng fiber wheel of this variety, and the average yield per mu in the two years was higher than that of the control variety Nongda 108.

2. Production test.

In the production test in 2011, the average yield per mu of this variety was 489kg, which was higher than that of the control variety Nongda 108.

3. Key points of cultivation.

1. Key points of planting.

1) Generally, from the end of March to mid-to-late April, the variety can be planted in plots with medium fertility or above, and the planting density per mu is generally 3500-4000 plants.

2) During the cultivation period, it is necessary to pay attention to the prevention and control of gray planthopper and corn borer to ensure that the growth environment is suitable.

2. The area where it is planted.

1) Generally, this variety can be planted in the central and southern parts of Jiangsu, southern Anhui and Zhejiang.

2) In Jiangxi, Fujian and Guangdong corn regions, this variety can also be planted.

<> Ludan 288 plant height is, purple seedling leaf sheath and anthers, red filament, cylindrical fruit spike, red axis, yellow grain and semi-dentate, seed yield, 1000-grain weight, bulk density, resistance to small spot and rough shrinkage, medium resistance to curvular leaf spot disturbance rough disease, southern rust, stem rot and ear rot, high susceptibility to tumor powdery mildew. In the 2015 regional trial of the general group (5000 mu) of summer maize varieties in the province, the average yield per mu was increased compared with the control variety Zhengdan 958.

1. Characteristics of Ludan 288 maize seeds

1. Features. 1) Ludan 288 plant height is, ear position is, the color of the seedling leaf sheath is purple, the color of the filament is red, the color of the anthers is purple, the lodging rate is , and the inversion rate is .

2) The fruit spike is cylindrical, the spike length is, the spike thickness is, the bald head is, the average number of spike rows is rows, and the number of grains per spike is 545.

3) Red shaft, yellow grain, Zhisheng shape is semi-dentate, seed yield, 1000-grain weight, bulk density.

2. Disease resistance and quality analysis.

1) According to the disease resistance inoculation identification of the Institute of Plant Protection, Hebei Academy of Agriculture and Forestry Sciences (2017), the variety was resistant to small spot and rough shrinkage, medium resistance to curvature leaf spot, southern rust, stem rot and ear rot, and high susceptibility to tumor powdery mildew.

2) According to the quality analysis of the Grain Quality Supervision, Inspection and Testing Center (Tai'an) of the Ministry of Agriculture (2016), the crude protein content of this variety is crude fat, lysine and crude starch.

2. Introduction to Ludan 288

1. Points to note for planting.

1) When planting, the appropriate density is generally 4500-5000 acres.

2) It should be noted that it should be used with caution in areas with high incidence of tumor black powder.

2. Yield performance.

1) In the 2015 regional test of the general group (5000 mu) of summer maize varieties in the province, the average yield per mu of this variety was higher than that of the control variety Zhengdan 958.

2) In the regional test of the general group (5000 mu) of summer maize varieties in the province in 2016, the average yield per mu of this variety was higher than that of the control variety Zhengdan 958.

3) In the production test in 2017, the average yield per mu of this variety was higher than that of the control variety Zhengdan 958.

Summary. Breeder: Shandong Lubei Seed Industry ****.

Variety**: A generation hybrid with a combination of LBX358 LBX535. The female parent LBX358 was crossed between the female parent of Xianyu 335 and Zheng 58 and then backcrossed, and the male parent LBx535 was bred by the sire of 0515 Xianyu 335 as the basic material.

Characteristics: semi-compact plant type, summer sowing growth period of 108 days, 1 day earlier than Zhengdan 958, 17 18 leaves of the whole plant, seedling leaf sheath purple, leaf color light green, filament pink, anther light purple, 3 4 male spike branches. Regional test results:

Plant height cm, ear position cm, lodging rate inverted rate. The fruit spike is long and cylindrical, the spike length is cm, the spike thickness is cm, the bald cm is cm, the number of spike rows is average, the number of grains per spike, the red axis, the yellow grain, the semi-dentate type, the seed yield, the weight of 1000 grains, and the bulk weight of the gram. In 2013, it was identified by the Institute of Plant Protection, Hebei Academy of Agriculture and Forestry Sciences

Medium resistance to small spot disease, curvature leaf spot and dwarf mosaic disease, susceptible to large spot disease, stem rot, high susceptibility to tumor powdery mildew. In 2014, it was supervised and inspected by the Ministry of Agriculture.

A generation of hybrids with a combination of LBX358 LBX535. The female parent LBX358 was crossed between the female parent of Xianyu 335 and Zheng 58 and then backcrossed, and the male parent LBx535 was bred by the sire of 0515 Xianyu 335 as the basic material. Features:

The plant type is semi-compact, the growth period of summer sowing is 108 days, 1 day earlier than Zhengdan 958, the leaves of Quan Hongming leakage plant are 17 18, the seedling leaf sheath is purple, the leaf color is light green, the filament is pink, the anthers are lavender, and the male panicle branches are 3 4. The results of the regional test showed plant height cm, ear position cm, lodging rate and fold rate.

The fruit spike is long and cylindrical, the spike length is cm, the spike thickness is cm, the bald cm is cm, the number of spike rows is average, the number of grains per spike, the red axis, the yellow grain, the semi-dentate type, the seed yield, the weight of 1000 grains, and the bulk weight grams. In 2013, it was identified by the Institute of Plant Protection of Hebei Academy of Agriculture and Forestry Sciences: medium resistance to small spot disease, curvular leaf spot and dwarf mosaic disease, susceptibility to large spot disease, stem rot, and high susceptibility to tumor smut.

In 2014, it was supervised and inspected by the Ministry of Agriculture.

Foot **? Yes.

Summary. Holographic Ludan 981 has a summer sowing growth period of 94 days, which is a medium-early maturing variety, with fast growth in the middle stage, developed root system, good lodging resistance and strong regional adaptability. The plant is semi-compact, with a height of 260 cm (20 cm shorter than the conventional one), an ear height of 98 cm, and a mature live stem.

The spike is cylindrical, uniform in size, without bald tips, and the spike length is 24?26 cm, ear thickness cm, seed yield 88%, semi-dentate type of seeds, yellow and white grains, white shaft, excellent quality. It is resistant to corn small spot, stem rot, Curvularia leaf spot, large spot, powdery mildew, rough shrinkage, rust, dwarf mosaic disease, bacterial wilt, etc., and is resistant to corn borer, showing good comprehensive resistance.

Holographic Ludan 981 has a summer sowing growth period of 94 days, which is a medium-early maturing variety, with fast growth in the middle stage, developed root system, good lodging resistance and strong regional adaptability. The plant is semi-compact, with a height of 260 cm (20 cm shorter than the conventional one), an ear height of 98 cm, and a mature live stem. The spike is cylindrical, uniform in size, without bald tips, and the spike length is 24?

26 cm, ear thickness cm, seed yield 88%, semi-dentate type of seeds, yellow and white grains, white shaft, excellent quality. It is resistant to corn small spot, stem rot, Curvularia leaf spot, large spot, powdery mildew, rough shrinkage, rust, dwarf mosaic disease, bacterial wilt, etc., and is resistant to corn borer, showing good comprehensive resistance.

Ludan 981 cultivation technology points: the sowing amount per mu is 2 kg, and the general field planting density is 3000 3300 mu. Ludan 981 is suitable for planting in Shandong, Henan, Hebei, Shaanxi, northern Jiangsu, northern Anhui and summer maize areas.

Summary. The seedlings of this hybrid have purple leaf sheaths, red filaments, light purple anthers, and semi-compact plant shape. The average growth period is 100 days, the average plant height is 280 cm, and the average ear height is 118 cm.

Disease resistance is good. In 2001, the Institute of Plant Protection of Hebei Academy of Agriculture and Forestry Sciences was entrusted to carry out the identification of the National Huanghuaihai Summer Maize Regional Test Disease Resistance Identification Unit, and the results were: high resistance to small spot disease (grade), Curvularia leaf spot (grade), bacterial wilt (disease rate 0), resistance to large spot disease (grade), medium resistance to corn powdery mildew (disease rate of corn dwarf mosaic disease (grade).

It has a certain resistance to corn borer (cardiac leaf eating grade). Poor lodging resistance (folding). The fruit spike is cylindrical, the spike length is cm, the spike thickness is cm, the shaft thickness is cm, the bald cm, the spike row is several rows, the number of grains per spike is 550, the weight of 1000 grains, and the seed yield.

Red and white shaft, the grains are dentate-shaped, and the yellow grains (with a white top). Determined by the Grain Quality Supervision, Inspection and Testing Center of the Ministry of Agriculture (Beijing), the crude protein content, crude fat content, lysine content, crude starch content, and bulk weight are 745 grams. [1]

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The leaf sheath of this hybrid seedling is purple celery-colored, the filaments are red, the anthers are light purple, and the plant type is semi-compact. The average growth period is 100 days, the average plant height is 280 cm, and the average ear height is 118 cm. Disease resistance is better than that of the late shed.

In 2001, the Institute of Plant Protection of Hebei Academy of Agriculture and Forestry Sciences was entrusted to carry out the identification of the national Huanghuaihai summer maize regional test disease resistance identification unit, and the results were: high-yard potatoes are resistant to small spot disease (grade), Curvularia leaf spot (grade), bacterial wilt (disease rate is 0), resistance to large spot disease (grade), medium resistance to corn smut (disease rate is corn dwarf mosaic disease (grade). It has a certain resistance to corn borer (cardiac leaf eating grade).

Poor lodging resistance (folding). The fruit spike is cylindrical, the spike length is cm, the spike thickness is cm, the shaft thickness is cm, the bald cm, the spike row is several rows, the number of grains per spike is 550, the weight of 1000 grains, and the seed yield. Red and white shaft, the grains are dentate-shaped, and the yellow grains (with a white top).

Determined by the Grain Quality Supervision, Inspection and Testing Center of the Ministry of Agriculture (Beijing), the crude protein content, crude fat content, lysine content, crude starch content, and bulk weight are 745 grams. [1]