<> "The repository administrator has not yet configured an RDF license."^^ . <> . . . "An Approach to Screening for Resistance to Water and Heat Stress in Sorghum (Sorghum bicolor (L.) Moench)"^^ . "Sorghum (Sorglttrm bicolor (L.) hlocnchl is an important food crop of thc arid and scmiarrd tropics\r\nbut average yields are s t i l l bclow 1.000 kilograms per hcctare. and under drought conditions these\r\nmay fall below 100 kilogranls per hectare or there may evcn be total crop failure.\r\nBreeding for drought ,resistance in sorghum is a complex problem. Th e ohjec~ivco f thi s paper\r\nis to drscribc the developnicnt of a screening technique. based on a \"physiological approach.\" Itiitially.\r\na sample of gcnotypes ucrc selected from the sorghum genetic rcsources acccs5ions at the\r\nlntcrnational Crops Research I nsti tute for the Semi - Arid Tropics (ICKISAT) Ccntcr 10 rr'prc=,cnt\r\nmaterial collected from many countries over a range of altitudes (0 to 2.000 rnetcrs) and nwan annual\r\nrainfall (250 to 2 .SO0 niillimcters). covering most of the taxonomic groups. Some advanced hrccding\r\nmaterials were also included in this sample of over 700 lines. They were scrccncd undcr suvcre\r\ndrought conditions at ICRISAT in thc relatively rain-free summers from 1983 to 19S5.\r\nConsiderable genetic variation was shown in the response of these genotypes to ~.atcarn d\r\nheat stress. Visually observcd dillercnces in \"resistant\" and \"susceptible\" genotypes in tcrnis of\r\ndesiccation tolerance or avoidance. recovery resistance and ability to produce grain after the onwt\r\nof rains was thcn shown to be associatcd with spccilic physiological traits. Sc'lcctcd physiological\r\ndata from a fc\\v contrasting genotypes wcrc shown on relati\\'e leaf-watcr content (RL\\VC). leafwater\r\npotential and lcaf stoniatal conductance (gl). Thcse results vcrify that the visual \"resi~-\r\ntance\" traits identificd earlier were bascd on measurable physiological responses.\r\nIn conclusion. i t is argued that thc approach described has proved to be succcsslul in idcntifying\r\ndrought-mistant germplasni. With more basic research on the same contrasting genotyps. the\r\nproblcm of idcntifying drought-rc%istant sorghums could be largely ovcrcome."^^ . "1985" . . . . . . . . . . . . . . "R B"^^ . "Matthews"^^ . "R B Matthews"^^ . . "S N"^^ . "Azam-Ali"^^ . "S N Azam-Ali"^^ . . "J M"^^ . "Peacock"^^ . "J M Peacock"^^ . . . . "Proceedings of an International Research and Development Conference"^^ . . . . . "USA"^^ . . . . . . "An Approach to Screening for Resistance to Water and Heat Stress in Sorghum (Sorghum bicolor (L.) Moench) (PDF)"^^ . . . . . . . . . . . "CP_232.pdf"^^ . . . "An Approach to Screening for Resistance to Water and Heat Stress in Sorghum (Sorghum bicolor (L.) Moench) (Image (JPEG))"^^ . . . . . . "preview.jpg"^^ . . . "An Approach to Screening for Resistance to Water and Heat Stress in Sorghum (Sorghum bicolor (L.) Moench) (Indexer Terms)"^^ . . . . . . "indexcodes.txt"^^ . . "HTML Summary of #4207 \n\nAn Approach to Screening for Resistance to Water and Heat Stress in Sorghum (Sorghum bicolor (L.) Moench)\n\n" . "text/html" . . . "Sorghum"@en . .