Zhanjiang Station of the Chinese Academy of Tropical Agricultural Sciences has made new progress in the excavation of QTL resistance to peanut early spot disease

Recently, the Zhanjiang Station of the Chinese Academy of Thermal Sciences has made new progress in the QTL excavation of peanut early spot disease resistance, and the scientific and technological achievement "QTL analysis related to peanut early spot disease resistance based on the recombinant inbred line of Indian resistant peanut germplasm ICG12625" has passed the identification and registration of the Guangdong Provincial Science and
Technology Department.

 

Peanuts are the largest oil crops planted in tropical areas of China, and are also important oil/feed crops in hot areas (peanut straw and peanut meal are high-quality protein feeds).

Peanut early spot disease is one of the most important peanut leaf diseases in tropical areas such as Guangdong and Hainan, and infection with leaf spot disease will not only lead to a decrease in flower production, but also lead to a decrease
in the quality of peanut stems and peanut kernels.
Peanut early spot disease restricts the feed utilization
of peanut stems in hot areas.
In view of the scientific and technological achievements registered by Zhanjiang Station in this industrial problem, it is clear that the early spot disease resistance of equatorial peanut germplasm ICG12625 is a quantitative trait controlled by multiple genes, which is mainly determined by genetic genetic factors, and the optimal candidate genetic model for early spot disease resistance is the genetic model controlled by 3 master genes of total isotopothermia, 3MG-CEA; The early spot disease resistance QTL was identified in the equatorial peanut resources for the first time, and a new main effect QTL qELSB02.
1 was obtained, which explained the phenotypic variation of 21.
57%-30.
48%, which is the main effect QTL of early spot disease resistance with the highest interpretation rate and stable inheritance of phenotypic variation so far.
Fine localization intervals, tightly linked SNP sites, and molecular markers
for resistance-assisted selection were obtained.
This achievement lays a good foundation
for the development of molecular marker-assisted breeding of peanut early spot disease resistance and improving the efficiency of genetic improvement of early spot disease resistant varieties.

 

At present, Zhanjiang Station has used this achievement to carry out the breeding of peanut early spot disease resistant varieties, and obtained a number of excellent peanut strains including "Hot Red No.
1", of which "Hot Red No.
1" has entered the DUS testing stage
.
Hot Red No.
1, a pearl bean type continuous flowering variety, the main stem height of 49.
9cm, branching 8.
7, growth period of about 115 days, 100 kernels weight 56.
25g, kernel yield of 75%, mu yield of 267kg, crude fat content of 53.
55%, stem vine crude protein content of 11.
60%, high resistance to leaf spot disease and rust, can be oil, edible and feeding, suitable for sugarcane peanut intercropping
.
Hot Red No.
1 is a multi-purpose peanut strain
.

 

The results were jointly funded by the Guangdong Provincial Natural Science Foundation (2020A1515010636), the Hainan Natural Science Foundation (321QN348) and the Special Fund for Basic Scientific Research Business Expenses of the Chinese Academy of Tropical Agricultural Sciences (1630102017002
).