Breeding method of silage corn male parent

Abstract

The invention discloses a breeding method of a silage corn male parent, and belongs to the technical field of corn breeding. The method includes the steps: taking corn varieties or populations in tropical and subtropical zones as base materials, and performing single plant selfing in the tropical and subtropical zones from S1 to S10 to obtain stable selfing lines; selecting the selfing lines withdark green plant leaves, good grain quality, good disease resistance, density resistance, lodging resistance and high general combining ability, and performing planting identification on the selectedselfing lines in northeast and north China silage corn main producing zones; screening selfing lines with tropical and subtropical blood relationships, dull photoperiodic reaction, normal flowering, fruiting and maturing characteristics and the tasseling stage 10 days later than that of local featured grain corn variety parents as the silage corn male parent. The breeding method can be used for culturing silage corn varieties with high biological yield, good green staying property and excellent quality.

Description

technical field

[0001] The invention relates to the technical field of silage corn breeding, in particular to a method for breeding male parents of silage corn. Background technique

[0002] Silage corn refers to harvesting the green plants on the ground including fruit ears during the suitable harvest period (the position of the milk line of the grain is about 1 / 2), and after being chopped and processed, silage is made by silage fermentation to feed cattle and sheep A kind of corn mainly for herbivorous livestock. Compared with ordinary grain corn, silage corn has the characteristics of high biological yield, good greenness, and high quality.

[0003] In recent years, with the rapid development of animal husbandry, the implementation of the national grain-to-feeding policy and the adjustment of the planting structure in the Sickle Bay area, the demand for silage corn has continued to rise, and the planting area of ​​silage corn has expanded year by year. However, the exis...

Examples

Embodiment 1

[0025] Breeding process of silage corn male parent GRL62491: This inbred line is a two-ring line that was bred in 2016 by using the single-cross corn NH6249 as the basic material and selecting excellent single plants for 10 consecutive generations of self-crossing. In 2012, spring S1 and autumn S2 were planted in Nanning, Guangxi, with 90,000 plants / hm 2 High-density selection suppresses and eliminates bad individual plants, and selects excellent individual plants for self-crossing in combination with target traits; plant S3-S10 generations from 2013 to 2016, and select plants with dark green leaves, high grain quality, and disease resistance through field investigations and indoor planting tests Good, dense and resistant to lodging, the excellent single plant is continuously selfed. At the end of 2016, a stable inbred line was bred and named GRL62491; in 2017, GRL62491 was planted in Qingtongxia City, Ningxia City, and Hohhot City, Inner Mongolia. The inbred line PH6WC was use...

Embodiment 2

[0031] Breeding process of the male parent GRL315 of silage corn: in 2012, the population was constructed with Suwan 1, 5003, Ye 478 and Zheng 58 as the basic materials; in 2013, Nanning S1 in autumn and Hainan S2 in winter were used at 90,000 plants / hm 2 Self-fertilize under high density to select excellent individual plants; in the spring of 2014, Nanning S3 continued to self-select excellent individual plants; in autumn, Nanning S4 was identified for disease resistance, and individual plants with good disease resistance were selected for seedlings; in winter, Hainan S5 used 4 backbone lines Combining ability was determined as a test species; Nanning S6 was self-bred and purified in spring 2015, Nanning S7 was selected for self-crossing in autumn with good combining ability, and Hainan S8 was tested and self-crossed again in winter; Nanning S9 was self-bred and purified in spring 2016. In autumn, Nanning S10 selected the best ear selfing, and the inbred line was named GRL315....

technical field

[0001] The invention relates to the technical field of silage corn breeding, in particular to a method for breeding male parents of silage corn. Background technique

[0002] Silage corn refers to harvesting the green plants on the ground including fruit ears during the suitable harvest period (the position of the milk line of the grain is about 1 / 2), and after being chopped and processed, silage is made by silage fermentation to feed cattle and sheep A kind of corn mainly for herbivorous livestock. Compared with ordinary grain corn, silage corn has the characteristics of high biological yield, good greenness, and high quality.

[0003] In recent years, with the rapid development of animal husbandry, the implementation of the national grain-to-feeding policy and the adjustment of the planting structure in the Sickle Bay area, the demand for silage corn has continued to rise, and the planting area of ​​silage corn has expanded year by year. However, the exis...

Examples

Embodiment 1

[0025] Breeding process of silage corn male parent GRL62491: This inbred line is a two-ring line that was bred in 2016 by using the single-cross corn NH6249 as the basic material and selecting excellent single plants for 10 consecutive generations of self-crossing. In 2012, spring S1 and autumn S2 were planted in Nanning, Guangxi, with 90,000 plants / hm 2 High-density selection suppresses and eliminates bad individual plants, and selects excellent individual plants for self-crossing in combination with target traits; plant S3-S10 generations from 2013 to 2016, and select plants with dark green leaves, high grain quality, and disease resistance through field investigations and indoor planting tests Good, dense and resistant to lodging, the excellent single plant is continuously selfed. At the end of 2016, a stable inbred line was bred and named GRL62491; in 2017, GRL62491 was planted in Qingtongxia City, Ningxia City, and Hohhot City, Inner Mongolia. The inbred line PH6WC was use...

Embodiment 2

[0031] Breeding process of the male parent GRL315 of silage corn: in 2012, the population was constructed with Suwan 1, 5003, Ye 478 and Zheng 58 as the basic materials; in 2013, Nanning S1 in autumn and Hainan S2 in winter were used at 90,000 plants / hm 2 Self-fertilize under high density to select excellent individual plants; in the spring of 2014, Nanning S3 continued to self-select excellent individual plants; in autumn, Nanning S4 was identified for disease resistance, and individual plants with good disease resistance were selected for seedlings; in winter, Hainan S5 used 4 backbone lines Combining ability was determined as a test species; Nanning S6 was self-bred and purified in spring 2015, Nanning S7 was selected for self-crossing in autumn with good combining ability, and Hainan S8 was tested and self-crossed again in winter; Nanning S9 was self-bred and purified in spring 2016. In autumn, Nanning S10 selected the best ear selfing, and the inbred line was named GRL315....

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