caa a22 4500 477135455 CHVBK 20180405111716.0 cr unu---uuuuu 170330e19970501xx s 000 0 eng 10.1023/A:1002926117203 doi (NATIONALLICENCE)springer-10.1023/A:1002926117203 Variation in sterility among wheat (Triticum aestivum L.) genotypes in response to boron deficiency in Nepal [Elektronische Daten] [C.B. Budhathoki, M. Subedi, K.D. Subedi] Two field experiments were carried out at the Khairanitar Farm, Nepal during the winter season of 1993 to investigate whether wheat genotypes differ in their sterility response to low soil boron and whether boron added to soil can correct sterility. A nursery consisting of 41 diverse genotypes from Nepal, India, Bangladesh, Thailand, China, Pakistan and CIMMYT/Mexico were evaluated in a plot where severe sterility had been observed in previous years. The second experiment involved six genotypes of known sterility responses to boron grown with or without an application of boron at 1 kg ha-1. Large differences were observed among genotypes in terms of number of grain set per ear (range 0.5 to 30 ) and sterility (5.5% to 97.5%). About one third of all the genotypes had <25% sterility and 16 of them suffered >75% sterility. The genotypes Fang-60, Sonalika, De Mai 6-22, BUC/FLK/MYNA/VL and HDW-234 were highly tolerant to boron deficiency with <10% sterility. In sharp contrast, genotypes BOW/BUT, SERI/THB, Glennson, SW-41, Yunmai-33 and UHU were highly susceptible and set virtually no grains in the boron deficient plots. Strong responses to boron application were observed and genotypic variations were evident. Boron at 1 kg ha-1significantly reduced the number of late ears, increased number of grains per ear and grain yield in boron-responsive genotypes. Tolerant genotypes were not influenced by added boron. Given these striking genetic differences, progress in breeding wheat for B-deficient soils in Nepal should be worthwhile. Kluwer Academic Publishers, 1997 Boron nationallicence genotypic variability nationallicence sterility nationallicence Triticum aestivum nationallicence wheat nationallicence Budhathoki C.B. Lumle Agricultural Research Centre, PO Box 1, Pokhara, Nepal aut Subedi M. Lumle Agricultural Research Centre, PO Box 1, Pokhara, Nepal aut Subedi K.D. Plant Environment Laboratory, The University of Reading, Cutbush Lane, RG2 9AD, Shinfield, Reading, U.K aut Euphytica Kluwer Academic Publishers 95/1(1997-05-01), 21-26 0014-2336 95:1<21 1997 95 10681 https://doi.org/10.1023/A:1002926117203 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1023/A:1002926117203 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Budhathoki C.B. Lumle Agricultural Research Centre, PO Box 1, Pokhara, Nepal aut NATIONALLICENCE 700 1- Subedi M. Lumle Agricultural Research Centre, PO Box 1, Pokhara, Nepal aut NATIONALLICENCE 700 1- Subedi K.D. Plant Environment Laboratory, The University of Reading, Cutbush Lane, RG2 9AD, Shinfield, Reading, U.K aut NATIONALLICENCE 773 0- Euphytica Kluwer Academic Publishers 95/1(1997-05-01), 21-26 0014-2336 95:1<21 1997 95 10681 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer