Non-escaping frost tolerant QTL linked genetic loci at reproductive stage in six wheat DH populations
نویسندگان
چکیده
Reproductive stage frost poses a major constraint for wheat production in countries such as Australia. However, little progress has been made identifying key genes to overcome the constraint. In present study, severe event hit two large-scale field trials consisting of six doubled haploid (DH) populations at reproductive (young microspore stage) Western Australia, leading identification 30 robust QTL on 17 chromosomes. The 18 with phenotype variation over 9.5% were located 13 chromosomes including 2A, 2B, 2D, 3A, 4A, 4B, 4D, 5A, 5D, 6D, 7A, 7B and 7D. Most closely linked anthesis, maturity, Zadok stages well anthesis related genes. Out those, repetitively detected homologous regions 7A more than populations. Results showed that damage is associated alleles Vrn-A1a, Vrn-D1a, Rht-B1b, Rht-D1b, high copy number Ppd-B1. Vrn-B1a TaFT3-1B 5B 1B did not lead damage, indicating these early-flowering are compatible tolerance thus can be utilised breeding. Our results also indicate wild-type Rht-B1a Rht-D1a used when breeding frost-tolerant varieties without delaying flowering time.
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ژورنال
عنوان ژورنال: Crop Journal
سال: 2022
ISSN: ['2095-5421', '2214-5141']
DOI: https://doi.org/10.1016/j.cj.2021.02.015