Juice quality and nutrient status were studied in different maturity stages of 16 sugarcane clones under normal and water-logged conditions in two cropping seasons. In both the cropping seasons, the brix of juice showed an increasing trend towards maturity (18.78 to 20.23%), while sucrose content in juice reached its maximum in the 11th month (17.78%) and declined in the 12th month (16.71%). Reducing sugar varied from 0.45 to 2.15%, and out of 16 clones studied, seven recorded less than 1.0% reducing sugars under water logged conditions. The clones that showed higher brix and sucrose content registered lesser values of reducing sugars and vice-versa. Juice electrical conductivity varied from 0.90 (88 WL 2137 and 98 WL 1357) to 1.80 (88 WL 1072), while pH of the juice did not show significant variation among clones. Under water logging conditions, nitrogen and potassium content in juice significantly varied among the clones, while phosphorous content did not show significant variation. In both planting seasons, the clones WL 1061, 92 WL 1029, 93 WL 1297, 97 WL 633, 99 WL 379, and 91 WL 629 recorded comparatively better juice quality parameters under water logged conditions similar to that of resistant standards (Co 62175 and Co 8231).
A study of fifteen F1 hybrids of cucumber (Cucumis sativus L.) in a diallel set involving six parents showed over-dominance and low narrow-sense heritability for earliness, number of fruits per plant and total yield per plant. Components of additive gene actions were significant for fruit weight, fruit length and fruit diameter. The breeding methods like pure line selection for the above characters which have additive gene effects at significant levels and heterosis breeding which having predominant role of non-additive gene action, may be exploited for improvement of these traits.
Abstract Background Energy canes are viable feedstocks for biomass industries due to their high biomass production potential, lower susceptibility to insects and diseases, better ability to adapt to extreme conditions and clean bioenergy. Interspecific hybrids (ISH) and intergeneric hybrids (IGH) have great potential to meet the growing demand of biomass, biomass-derived energy and feedstock. Results In this study, two types of energy canes, Type I and Type II, derived from S. spontaneum and E. arundinaceous background were evaluated for high biomass, fiber and bioenergy potential under subtropical climate along with the check varieties Co 0238 and CoS 767. Out of 18 energy canes studied, six energy canes, viz., SBIEC11008 (204.15 t/ha), SBIEC11005 (192.93 t/ha), SBIEC13008 (201.26 t/ha), SBIEC13009 (196.58 t/ha), SBIEC13002 (170.15 t/ha), and SBIEC13007 (173.76 t/ha), consistently outperformed the check varieties under Type-I, whereas in type-II, SBIEC11004 (225.78 t/ha), SBIEC11006 (184.89 t/ha), and SBIEC14006 (184.73 t/ha) energy canes produced significantly higher biomass than commercial checks, indicating their superior potential for cogeneration. Estimated energy output from the energy canes (700–1300 GJ/ha/year) exceeded the range of co-varieties (400–500 GJ/ha/year) and energy utilization efficiency in plants and ratoon crops for energy canes viz., SBIEC11008 (3%, 1.97%), SBIEC14006 (1.93%, 2.4%), SBIEC11005 (1.7%, 1.9%), and SBIEC11001 (1.01%, 1.03%), was higher than best checks Co 0238 (0.77, 0.9%). Additionally, energy canes SBIEC 13001 (22.35%), SBIEC 11008 (22.50%), SBIEC 14006 (28.54%), SBIEC 11004 (30.17%) and SBIEC 11001 (27.03%) had higher fiber contents than the co-varieties (12.45%). Conclusion The study gives insight about the potential energy canes for higher biomass and energy value. These energy cane presents a vital option to meet the future demand of bioenergy, fiber and fodder for biomass due to their versatile capacity to grow easily under marginal lands without competing with cultivated land worldwide.
The pedigree of the commercial sugarcane varieties (‘Co’ canes) evolved from Sugarcane Breeding Institute, Coimbatore, India during 1970–2009 was studied. A total of 1088 ‘Co’ canes with known pedigree were evolved, among them 934 were from bi-parental crosses. The decade wise usage of breeding stocks revealed that clones Co 86011 (during 2000–2009), Co 7201 (during 1990–1999), CoC 671 (during 1990–1999 and 1980–1989) and Co 775 (during 1970–1979) were the most successful parents in evolving ‘Co’ canes. Fifty nine breeding stocks produced > 5 ‘Co’ canes each, contributed nearly 80% gametes to the total ‘Co’ canes evolved during 1970–2009.The pedigree study revealed that most of them (54) have POJ 2878 in recent ancestry indicating that their genetic variability is from limited origin. The breeding clones Co 775, CoC 671, Co 7201, Co 6806, Co 1148, Co 419 and Co 740 were the most successful parental stocks for evolving higher number of ‘Co’ canes across the studied period 1970–2009. The inbreeding coefficient or the coefficient of parentage (CoP) ranged from 0.00 (B017, Co 617, Co 853, Co 281, Q 63, Co 88002 and IG-91-1100) to 0.55 (Co 1307) with the average value of 0.09. Thirty-five parental clones have lower CoP than the average and their gametic contributionis evident to nearly 50% of the ‘Co’ canes evolved during the studied period.This indicated that even though having originated from limited clones of basic species, the genetic base of more than half of the breeding stocks is broader. More basic species clones are to be incorporated into the breeding programme for keeping higher level of geneticdiversity in future sugarcane varieties.
'%3e%3ccircle r='20' fill='%23008'/%3e%3ccircle r='17.5' fill='%23fff'/%3e%3ccircle r='3.5' fill='%23008'/%3e%3cg id='d'%3e%3cg id='c'%3e%3cg id='b'%3e%3cg id='a' fill='%23008'%3e%3ccircle r='.875' transform='rotate(7.5 -8.75 133.5)'/%3e%3cpath d='M0 17.5.6 7 0 2l-.6 5L0 17.5z'/%3e%3c/g%3e%3cuse xlink:href='%23a' transform='rotate(15)'/%3e%3c/g%3e%3cuse xlink:href='%23b' transform='rotate(30)'/%3e%3c/g%3e%3cuse xlink:href='%23c' transform='rotate(60)'/%3e%3c/g%3e%3cuse xlink:href='%23d' transform='rotate(120)'/%3e%3cuse xlink:href='%23d' transform='rotate(-120)'/%3e%3c/g%3e%3c/svg%3e)