Breeding method for wheat having fast grain filling and fast dehydration
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A technology of grain and wheat, applied in the field of wheat breeding, to achieve the effects of early filling time, high thousand-grain weight, and high filling rate
Active Publication Date: 2017-03-29
JIANGSU LIXIAHE REGION AGRI RES INST
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[0005] The purpose of the present invention is to solve the problems faced by wheat production under the current situation, and to provide a breeding method for wheat with fast grain filling and fast dehydration
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Embodiment 1
[0029] 1. Parental selection
[0030] The varieties with high grouting rate and high strength, early grouting completion time and high grain weight, high dehydration rate and short time, and early maturity were selected as the female parent and the male parent for hybridization.
[0031] The Yang 91F138 line is selected from the backbone parent Yangmai 158 in my country. It has the characteristics of fast seedling emergence, fast grain filling, high grain weight, moderate resistance to scab, and excellent quality. 2.0 g / thousand grains per day, the grouting is basically completed 35 days after flowering and the thousand-grain weight is > 40 g, the grain dehydration is fast (the moisture content of the grain decreases by 4.5% on average every day after physiological maturity), and the dehydration time is short (the moisture content of the grain after 4-6 days of dehydration lower than 15%) and the moisture content of the grain at the full maturity stage is lower than 15%; Yang 90...
Embodiment 2
[0047] 1. Parent selection:
[0048] The varieties with high grouting rate and high strength, early grouting completion time and high grain weight, high dehydration rate and short time, and early maturity were selected as female parent and male parent for grouping.
[0049] Yangmai 158, the backbone parent in my country, has the characteristics of fast seedling germination, fast grain filling, high grain weight, moderate resistance to scab, and excellent quality. > 40 grams, the grain dehydrates quickly (the moisture content of the grain drops by 4.5% on average every day after physiological maturity), the dehydration time is short (the moisture content of the grain drops below 15% after 4-6 days of dehydration), and the moisture content of the grain is lower than 15% at the full maturity stage.
[0050] Yangmai 158 was used as the female parent, and the powdery mildew resistant near-isogenic line material selected from the offspring of Y.C / Yangmai 5 / / 4*85-85 was used as the male...
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Abstract
The invention discloses a breeding method for wheat having fast grain filling and fast dehydration, and belongs to the field of wheat breeding. The method comprises the following steps: (1) carrying out parent research, identifying filling and dehydration characteristics of wheat varieties, and determining a parent cross combination; (2) according to seed selection requirements, determining a cross breeding or backcross breeding scheme; (3) in the seed selection process, comprehensively applying morphological trait investigation, studies on wheat grain filling and dehydration characteristics, different-stage sowing and yield identification, screening a genotype having fast grain filling, fast dehydration and high yield; and (4) breeding the new wheat variety having fast grain filling and fast dehydration. According to the breeding method for the wheat having fast grain filling and fast dehydration, the early generation morphological selection and the study on the grain filling characteristic and the dehydration characteristic are applied to wheat breeding at the same time, and the wheat material having fast grain filling and large dehydration rate can be accurately selected. The variety bred by the method has the advantages of early maturation, good maturation performance and grain plumpness. The filling rate is fast, the filling completing time is short and the thousand seed weight is high. The fast dehydration stage is immediately performed after high-efficiency completion of filling, the dehydration rate is fast, and the maturation period is short. Under the condition of late sowing, the wheat can be still harvested in advance, and crop rotation for rice can be performed in advance. The wheat adapts to new requirements of the current new wheat situation, and a foundation is laid for annual yield increase of rice and wheat in the middle and lower reaches of the Yangtze river.
Description
technical field [0001] The invention belongs to the technical field of wheat breeding, in particular to a breeding method for wheat with fast grain filling and fast dehydration. Background technique [0002] As one of the most important food crops in the world and our country, wheat plays a pivotal role in food production. The continuous improvement of the yield potential of varieties is a long-term task of our country, and with the rapid increase of population, the acceleration of urbanization, and the decrease of grain field area, it is more urgent to increase the grain yield and total yield. [0003] Grain filling characteristics of wheat are important physiological traits that affect yield, and its research can provide an important basis for setting grain yield goals and choosing breeding strategies. Grain filling is an extremely important and dynamic growth stage in the growth and development of wheat. The dry matter accumulation of wheat grains during the grain fillin...
Claims
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Application Information
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