Stability analysis of yield and capsaicinoids content in chili (<Emphasis Type="Italic">Capsicum</Emphasis> spp<Emphasis Type="Italic">.</Emphasis>) grown across six environments |
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Authors: | Tulsi Gurung Suchila Techawongstien Bhalang Suriharn Sungcom Techawongstien |
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Institution: | (1) Central Arid Zone Research Institute, Jodhpur, 342 003, India;(2) Present address: All India Coordinated Pearl Millet Improvement Project, Mandor, Jodhpur, 342 304, India |
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Abstract: | Pearl millet (Pennisetum glaucum) is the most important cereal in crop-livestock production systems in arid and drier semi-arid environments valued for its
grain and dry stover. The conventional approach of improving grain yield through greater partitioning of biomass to the grain
and decreased stover yield is not a viable strategy for arid regions where biomass also needs to be improved. The current
research tested the hypothesis whether biomass can be improved without extending the crop duration. The 232 F5 lines derived from a cross (J28 × RIB 335/18) were evaluated in their testcross form along with three commercial hybrids
under arid zone conditions. Biomass, grain and stover yields, panicle number, grain size and grain number panicle−1 varied 1.8 to 2.7 fold in progeny testcrosses. Variation in duration of flowering time accounted for only 2% of variation
in biomass, indicating that considerable scope existed for selection of testcrosses, and by implication, of F5 progenies with high biomass independent of crop duration. Stover yield accounted for 72% of differences in total biomass
with remaining accounted for by grain yield. From among 92 and 132 testcrosses that had flowering time comparable to two early
checks, most had significantly higher biomass, grain and stover yields than these early checks but none of the testcrosses
had earliness on par with extra-early maturing hybrid HHB 67. Mean superiority of best 5% testcrosses over early checks was
58% for biomass, 68% for stover yield and 53% for grain yield. The results indicated that there are good prospects of improving
biomass in arid zone pearl millet without significantly compromising crop duration. |
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