Major QTL (Quantitative Trait Loci) capable of influencing wheat ear length and application thereof
A technology for ear length and wheat, applied in the field of major QTLs affecting ear length of wheat, which can solve the problems of low marker density, few QTLs and molecular markers for ear length of wheat
Active Publication Date: 2019-03-01
CROP RES INST SHANDONG ACAD OF AGRI SCI
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Problems solved by technology
[0005] However, so far, few QTLs and molecular markers for wheat ear length have been applied to breeding.
Because most of the previous wheat QTLs were linkage maps constructed using SSR markers, the marker density was low, and most of the SSR markers were designed based on non-coding regions
Method used
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Embodiment 1
[0016] NO.1 Experimental materials and methods
[0017] NO.1.1 Experimental materials and field management
[0018] The mapping population is a recombinant inbred line population (RIL) consisting of 186 F6 lines, and the parents are the local variety Banmangzi and the main variety Jimai 22.
[0019] It was planted in Jinan in 2015-2016 and 2016-2017, and the RIL population and parents were planted in Heze in 2015-2016. The field experiment adopted a completely randomized block design with three repetitions. There are 3 rows in each plot, the row length is 4 meters, the spacing between plants is 25 cm, and 100 plants are planted in each row. Field management adopts local conventional management.
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The invention belongs to the field of wheat genetic breeding, and provides major QTL (Quantitative Trait Loci) capable of influencing the wheat ear length. The major QTL are located on a 2D (Two-Dimensional) chromosome short arm, and are located between a left marker AX-108988107 and a right marker AX-111096297 of an SNP (Single Nucleotide Polymorphism) marker; the major QTL can affect the spikelet number at the same time; the QTL have a candidate gene for encoding IAA (Indoleacetic Acid)-amino acid hydrolase; phenotypic variation explanation rates of the QTL on the ear length and the grain number per ear are respectively 27.9 to 20.1 percent and 18.5 to 10.2 percent; positive allelic variation of the QTL are sourced from parent varieties-Banmangzi, and the QTL have huge application valuein wheat breeding.
Description
technical field [0001] The invention belongs to the field of wheat genetics and breeding, and specifically relates to a main effect QTL affecting wheat ear length and application thereof. Background technique [0002] Wheat is one of the most important food crops in the world, and its yield is an important factor affecting the development and stability of the national economy. Therefore, improving yield has always been one of the most important breeding goals of breeders. The three elements of wheat yield include: ear number, ear grain number and grain weight. However, these three yield traits in wheat are closely related to ear length. Therefore, breeders study ear length as an important index in breeding. [0003] Ear length is a quantitative trait controlled by multiple genes. Studies have shown that ear length has high heritability. Compared with other yield traits, if the genetic mechanism of ear length can be mastered, it can better assist wheat breeding. With the...
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Login to View More IPC IPC(8): C12Q1/6895C12N15/11
CPCC12Q1/6895C12Q2600/13C12Q2600/156
Inventor 李玉莲李根英宋国琦高洁张淑娟张荣志李玮刘敏陈明丽
Owner CROP RES INST SHANDONG ACAD OF AGRI SCI