Climatic suitability mapping and driving factors detection for whole crop maize and sorghum–sudangrass hybrid production in the south area of the Korean Peninsula and Jeju Island

Abstract

The climatic suitability and driving climatic factors of forage crops are considered fluctuant, and their measurements are important for the production of high-quality forage under the context of global climate change. Meanwhile, need for improving the domestic supply of high-quality forage sources is increasing in the related parties of forage and livestock production in Korea. Therefore, this study analyzed the climatic suitability conditions of whole crop maize (Zea mays L.) and sorghum-sudangrass hybrid (Sorghum bicolor × Sorghum sudanense) in the south area of the Korean Peninsula and Jeju Island. Furtherly, the driving climatic factors on the two summer forage crops were detected through stepwise regression analysis based on historical field experiments and climatic data. The results showed that the climatic conditions in almost all the areas of the south area of the Korean Peninsula and Jeju Island are suitable or moderately suitable for the cultivation of the two forage crops except some mountainous areas. However, since the precipitation in this region is concentrated in the growth period of the two forage crops, the accumulated precipitation was detected stressful on their yields.

Construction of ultra-high-density genetic linkage map of a sorghum-sudangrass hybrid using whole genome resequencing

“…Therefore, it has broad application prospects in environmental protection, animal husbandry, and aquaculture, among others. It is widely planted in the United States [ 2 ], including northern Colorado [ 3 ], China [ 4 ], the southern part of the Korean Peninsula, and most of the dry areas of Jeju Island [ 5 ]. Dong et al [ 6 ] reported that the sorghum-sudangrass hybrid is rich in amino acids, sugars, minerals, and other compounds, with high nutritional value and good palatability, and is commonly used as hay, silage, or green feed.…”

“…An insufficient forage supply has become a limiting factor in the livestock industry in the northwestern Himalayan region of India [ 7 ], the southern part of the Korean Peninsula and Jeju Island [ 5 ], the northern and southeastern United States [ 8 , 9 ], and China [ 10 ]. Therefore, it is necessary to identify key genes that control desirable traits and select new varieties of the sorghum-sudangrass hybrid with high yields and quality.…”

Quantitative trait locus mapping for important yield traits of a sorghum-sudangrass hybrid using a high-density single nucleotide polymorphism map

“…Cattle, sheep, geese, ducks, poultry, and other livestock utilize this hybrid as feed. The sorghum-sudangrass hybrid presents a developed root system, good soil capacity, and strong ecological adaptability and further presents broad development and utilization prospects in environmental protection and animal husbandry, especially the development of the breeding industry in agricultural areas ( Saballos et al., 2008 ; Han et al., 2015 ; Mahmoudzadeh and Oad, 2018 ; Peng et al., 2020 ). In recent years, with the rapid development of animal husbandry and frequent extreme weather worldwide, increasing demand for high-quality forage has indicated a shortage of high-quality green and fresh forage.…”

“…In recent years, with the rapid development of animal husbandry and frequent extreme weather worldwide, increasing demand for high-quality forage has indicated a shortage of high-quality green and fresh forage. This is the main reason for limiting the quality and efficiency of animal husbandry in the northwestern Himalayan region of India ( Mir et al., 2020 ; Kumar et al., 2022 ), the southern part of the Korean Peninsula and Jeju Island ( Peng et al., 2020 ), the northern and southeastern United States ( Wells et al., 2014 ; Nave et al., 2020 ), northern Europe ( Liatukienė et al., 2008 ), Canada ( Bélanger et al., 2006 ), and parts of China ( Fang, 2018 ). Therefore, increasing forage yield is crucial in meeting sufficient livestock nutrition and accelerating production.…”

Performance and phenotypic selection of sorghum genotypes for cutting and grazing in two planting seasons

“…For Dillard et al (2017) in temperate countries these hybrids are good alternatives for summer pastures production when winter forages have low productivity. In regions with low rainfall, planting in summer allows good forage accumulation in short time period (Peng et al 2020).…”