ISSN:
1573-5060
Keywords:
Sorghum bicolor
;
sorghum
;
virgatum
;
arundinaceum
;
verticilliflorum
;
exotic germplasm
;
transgressive segregation
;
introgression
;
backcross
Source:
Springer Online Journal Archives 1860-2000
Topics:
Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
Notes:
Summary Sorghum [Sorghum bicolor (L.) Moench] backcross populations containing 3 to 50% wild germplasm were evaluated in south central India for grain yield and nine related traits. No individual BC0F2- to BC2F2-derived lines were high transgressive segregates for grain yield. Only 1.5% of all BC3F2- or BC4F2-derived lines were transgressive segragates, with 26% higher mean grain yield than their respective recurrent parents. The ten highest-yielding BC2F2- to BC4F2-derived lines per mating having parent CK60B yielded an average of 14% more than CK60B, which was, at the 5% level, a statistically significant difference. However, the increased yield was associated with increased plant height. The highest-yilding lines from RS/R/A2725 x virgatum and RS/R/A2725 x verticilliflorum were an average of 13.5% higher-yielding than RS/R/A2725 (a significant difference) and were equal in plant height. Selection increased BC2 mean grain yields by 6 to 27%. Population mean yield, mean yield of selected lines, and frequency of high-yielding lines were highest in the BC4.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF00021895
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