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Effect of water deficit stress on yield and yield components of pinto bean (Phaseolus vulgaris L.) genotypes
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Abstract: (4480 Views) |
| To study the effect of water deficit stress on yield and yield components of pinto bean (Phseolus vulgaris L.) genotypes, a split plot experiment in a complete randomized block design with three replications was conducted at the National Khomein Bean Research Field Station in 2007 cropping season. Irrigation regimes including irrigation after 60 (I1), 80 (I2) and 100 (I3) mm evaporation from class A pan asigned to main plots and pinto bean genotypes (Khomein, Talash, Tylor, Cos16, KS21193, KS21191, KS21189, G01437 and G14088) were randomized in subplots. Results showed that water deficit stress reduced biological yield, grain yield, number. of pods plant-1, 100 grain weight and harvest index (HI). However, the number of grains.pod-1 was not significantly affected by water deficit stress. Irrigation after 60 mm evaporation with 5427.8 kg ha-1 of biological yield, 2526.4 kg ha-1 of grain yield, 38.3 g of 100 grain weight and 46.4% of harvest index, was the best irrigation regime for pinto bean genotypes. Number of pods.plant-1,was relatively influenced by water deficit stress. Response of pinto bean genotypes to water deficit stress was significantly different. Cos16 and Tylor had the best response to the water stress in I3 treatment and were identified as water deficit stress tolerant genotypes. On the other hand, KS21193 with 33.8% and 69.9% yield reduction in I2 and I3 water deficit treatments when compared with I3 treatment was the most sensitive genotype to water deficit stress. |
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| Keywords: : Grain yield, Khomein, Pinto bean and Water deficit stress |
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Full-Text [PDF 195 kb]
(1847 Downloads)
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Type of Study: Scientific & Research |
Subject:
Special
Received: 2015/02/22 | Accepted: 2015/02/22 | Published: 2015/02/22
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