Use of Controlled Low Temperature in Evaluating the Cold Hardiness of Inbred and Hybrid Maize¹

Genetic Analysis of Seedling Growth under Cold Temperature Stress in Grain Sorghum

“…The importance of the maternal effects on germination and emergence at low temperature has been reported in several studies (Pinnell, 1949; Pesev, 1970; Grogan, 1970; Soujeole and Miller, 1984). The genetic contribution of male parents to emergence characteristics was also significant and consistent with reports in the literature (Haskell and Singleton, 1949; Neal, 1949; Grogan, 1970). Male parents generally contributed more to rate of emergence than to stand establishment in these experiments.…”

Resistance to Pythium Manifest by Excised Corn Embryos at Low Temperatures1

“…High soil moisture (3,10) and low soil temperature (3,4,8,10) favor disease development, with most disease occurring in soils at 50 to 70% of water holding capacity and at 10 to 12" C. Generally less disease develops at moisture and temperature levels above and below these limits. Increasing the period of incubation at the low temperature results in ,greater disease developmenfl ( 4,8). Various "cold testing" procedures, temperature schedules, and methods of handling and treating the seed have been employed"• 4 (5, 6,8,12,14,15).…”

Seed maturation and drying in sweet corn (Zea mays L.) endosperm mutants

“…The effects of the single genes ae, su, and wx on kernel vigour have been investigated. Haskell and Singleton (1949) found no significant difference in the ability of su and sh2 kernels to withstand cold germination conditions and concluded that genetic factors related to cold hardiness appear to be more important than whether the endosperm is starchy or sugary. However, using F1 seed from crosses between isogenic lines, Nass and Crane (1970), found su endosperm types associated with significantly reduced seedling height, seedling growth rate, and percentage of emergence compared with normal counterparts.…”