National Academy of Agricultural Sciences (NAAS)
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PRINT ISSN : 2319-7692
Online ISSN : 2319-7706 Issues : 12 per year Publisher : Excellent Publishers Email : editorijcmas@gmail.com / submit@ijcmas.com Editor-in-chief: Dr.M.Prakash Index Copernicus ICV 2018: 95.39 NAAS RATING 2020: 5.38 |
A field experiment was conducted during the kharif season of 2016 and 2017 at Regional Agricultural Research Station, Rajouri of SKUAST-Jammu, to study the effect of row ratio of male and female parents and Spacing on single cross QPM maize (Zea mays L.) hybrid seed production. The experiment was laid out in FRBD design with three replications, constituting 8 treatment combinations involving two factors viz., spacing in main plots (S1 - 60 cm x 20 cm and S2 – 75 cm x 20 cm) and four row ratios of male and female parents (R1 – 1:2, R2 – 1:3, R3 – 1:4 and R4 – 1:5) in sub- plots of Vivek QPM- 9 i.e., VQL -2 and VQL - 1. Row spacings S2 (75cm x 20 cm) gave significantly higher hybrid seed yield over the row S1 (60cm x 20 cm) spacing. The same results were obtained in case of number of cobs per plant, cob length, no of grains per cob and 100 grain weight. The higher B: C ratio (1:2.25) was observed in case of row spacing S2 over S1 (1:1.91). As regards to effect of row ratio on seed yield the maximum hybrid seed yield (16.40 q / ha) was obtained in the row ratio of male and female parents R2 (1:3), which was statistically superior to other treatments followed by row ratio R3 (1:4). The similar trend was observed with respect to yield attributing characters number of cobs per plant, cob length, no of grains per cob and 100 grain weight. There was no significant interaction between row ratio and spacing. As regards the profitability of single cross hybrid seed production of QPM as influenced by the different treatments the highest net income of ₹ 94553 and B: C ratio of 2.78 was obtained in 1:3 ratios of male and female parents over the other row ratios i.e., 1:2, 1:4 and 1:5ratios. However the row spacing of (75cm x20 cm) was more remunerative than the closer spacing of (60cm x20cm). The highest hybrid seed yield of single cross hybrid maize was recorded 16.40 q / ha with row spacing of 75 cm x 20 cm. and 1:3 ratios of male and female parents over the other ratios i.e., 1:2, 1:4 and 1:5 ratio.
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