Rice crossbreeding method

Abstract

The invention belongs to the field of rice planting and specifically discloses a rice crossbreeding method. According to the invention, Mei 1A taken as a female parent and Huazhan taken as a male parent are hybridized into a new variety of late rice (named as Meiyouhuazhan). The late rice has a higher tillering ability (tillering rate kept about 497.7%), excellent lodging resistance, high rice quality (few white parts of rice grains and high external quality of rice) and high yielding ability. The variety is safe and reliable and no CaMV35S promoter, NOS terminator, Bt gene, BAR gene or HPT gene is detected.

Description

technical field

[0001] The invention belongs to the field of rice planting, and in particular relates to a rice hybrid breeding method. Background technique

[0002] Rice is one of the most important food crops in my country. With the improvement of people's living standards and the increasing population, the trend of arable land reduction continues. Increasing rice production and increasing stable supply have been the subjects that my country's rice breeding has been working on for a long time. Using excellent germplasm resources for high-yield and stable breeding is the most effective and economical way to increase rice yield.

[0003] However, the traditional breeding method selects the male parent with excellent traits and the advanced female parent to cross and then self-crosses. Although excellent offspring can also be obtained, the diversity of the offspring requires multiple screening and cultivation of the offspring, resulting in The seed selection process is cumbe...

Examples

Embodiment 1

[0029] Rice hybrid breeding method, the method comprises the following steps:

[0030] (1) Source and selection of parents: the female parent is Mei 1A, and the male parent is Huazhan;

[0031] The origin of the female parent Mei 1A is that the maintainer 164-2-1B was bred by crossing the F2 generation of Ⅱ-32B / BoB with the intermediate material F3-3 of the maintainer line, and bred in Sanya and Changsha respectively according to the pedigree method for 6 generations. The number of the maintenance material is Y138B, and it was crossed with American Guangye rice US-2B; the maintenance material was bred according to the line method and crossed with the male sterile line Fengyuan A, and the pollen was completely aborted and the plant type was moderate through multi-generation backcross selection. , the stems are short and strong, the ears are large and the grains are large, the stigma exposure rate is high, the rice quality is high, and the agronomic characters are uniform. It wa...

Embodiment 2

[0041] The product of Example 1 was planted, and Tianyou Huazhan was used as the control group.

[0042] Embodiment 1 product characteristics: indica type three-line hybrid rice variety. Cultivated as double-cropping late rice in Hunan Province, the total growth period is 123.3 days, which is 0.4 days longer than the control field Youhuazhan. The plant height is 97.7 cm, the effective panicle is 221,000 per mu, the total number of grains per panicle is 152.8, the seed setting rate is 80.8%, and the thousand-grain weight is 24.5 grams. Resistance: leaf blast average 3.0, ear blast average 4.2, ear blast loss rate average 2.4, rice blast comprehensive resistance index 3.0, bacterial blight 7.0, rice smut 5.5. Main indicators of rice quality: brown rice rate 80.8%, polished rice rate 72.0%, whole rice rate 60.1%, grain length 7.1 mm, aspect ratio 3.6, chalky grain rate 19%, chalkiness 4.9%, transparency level 1, alkali elimination The value is 5.0, the gel consistency is 30 mm,...

technical field

[0001] The invention belongs to the field of rice planting, and in particular relates to a rice hybrid breeding method. Background technique

[0002] Rice is one of the most important food crops in my country. With the improvement of people's living standards and the increasing population, the trend of arable land reduction continues. Increasing rice production and increasing stable supply have been the subjects that my country's rice breeding has been working on for a long time. Using excellent germplasm resources for high-yield and stable breeding is the most effective and economical way to increase rice yield.

[0003] However, the traditional breeding method selects the male parent with excellent traits and the advanced female parent to cross and then self-crosses. Although excellent offspring can also be obtained, the diversity of the offspring requires multiple screening and cultivation of the offspring, resulting in The seed selection process is cumbe...

Examples

Embodiment 1

[0029] Rice hybrid breeding method, the method comprises the following steps:

[0030] (1) Source and selection of parents: the female parent is Mei 1A, and the male parent is Huazhan;

[0031] The origin of the female parent Mei 1A is that the maintainer 164-2-1B was bred by crossing the F2 generation of Ⅱ-32B / BoB with the intermediate material F3-3 of the maintainer line, and bred in Sanya and Changsha respectively according to the pedigree method for 6 generations. The number of the maintenance material is Y138B, and it was crossed with American Guangye rice US-2B; the maintenance material was bred according to the line method and crossed with the male sterile line Fengyuan A, and the pollen was completely aborted and the plant type was moderate through multi-generation backcross selection. , the stems are short and strong, the ears are large and the grains are large, the stigma exposure rate is high, the rice quality is high, and the agronomic characters are uniform. It wa...

Embodiment 2

[0041] The product of Example 1 was planted, and Tianyou Huazhan was used as the control group.

[0042] Embodiment 1 product characteristics: indica type three-line hybrid rice variety. Cultivated as double-cropping late rice in Hunan Province, the total growth period is 123.3 days, which is 0.4 days longer than the control field Youhuazhan. The plant height is 97.7 cm, the effective panicle is 221,000 per mu, the total number of grains per panicle is 152.8, the seed setting rate is 80.8%, and the thousand-grain weight is 24.5 grams. Resistance: leaf blast average 3.0, ear blast average 4.2, ear blast loss rate average 2.4, rice blast comprehensive resistance index 3.0, bacterial blight 7.0, rice smut 5.5. Main indicators of rice quality: brown rice rate 80.8%, polished rice rate 72.0%, whole rice rate 60.1%, grain length 7.1 mm, aspect ratio 3.6, chalky grain rate 19%, chalkiness 4.9%, transparency level 1, alkali elimination The value is 5.0, the gel consistency is 30 mm,...