Turkish Journal of Field Crops

Phone:

90 232 311 26 79

Email:

contact@field-crops.org

Address:

2. Beyler İş Hanı, No: 313 Kat: 3 Konak-İzmir

ESTIMATION OF COMBINING ABILITY AND HETEROTIC POTENTIAL FOR WITHIN-BOLL YIELD TRAITS UNDER LEAF CURLING DISEASE INFESTATION IN COTTON

Amir SHAKEEL, Muhammad Mansoor SHERAZ, Asif SAEED, Imtiaz ALI, Wajad NAZEER, Zahid AMIN, Ali AMMAR

Abstract

Cotton leaf curling disease (CLCuD) is the major threat to cotton production and quality in many cotton producing countries including Pakistan. The objective of current work was to identify the potential genotypes which perform well under the disease prevalence through manipulating the within-boll yield traits. For this purpose; six genotypes possessing broad genetic base were selected and crossed in all possible combinations. Crossed seeds from 30 combinations and selfed seeds from 6 parental genotypes, thus produced, were grown along with parents under field conditions in randomized complete block design replicated thrice. Analysis of variance depicted significant differences among genotypes for all the traits under consideration. Strong evidences for the prevalence of non-additive genetic behavior of the traits were recorded. The genotype MNH[1]886 was found as good general combiner for lint mass per boll, seed mass per seed and CLCuD index; MNH[1]888 for lint mass per seed and seed cotton yield while VH-61 for seed mass per boll and seed number per boll. Results pertaining to specific combining ability effects revealed that the most desirable combinations for various traits were; FH-113 × FH-2015 for lint mass per boll and seed number per boll, MNH-888 × IR-4 for lint percentage and lint mass per seed, MNH-888 × VH-61 for seed cotton yield and CLCuD index. Most of the hybrids showed greater mid parent heterosis than that of better parent. Results from the current study supported the hypothesis that seed cotton yield and quality can be enhanced through exploitation of within[1]boll yield components in CLCuD tolerant cultivars.

Keyword: Bt-cotton, CLCuD, combining ability, heterosis, within-boll yield components ,

Effects of Different Water Stress Levels on Biomass Yield and Agronomic Traits of Switchgrass (Panicum virgatum L.) Varieties under Semi-Arid Conditio

Erdal GONULAL, Suleyman SOYLU, Mehmet SAHIN

Abstract

A field experiment was conducted in the Wielkopolska region at the Gorzyń Research Station, Poland (52.34°N, 15.54°E) in Central Europe. The study was conducted over a 3-year period (2017, 2018, 2019) as a two-factorial design with four replications in the RCBD. The aim of the research was to determine the effect of the cultivar (‘Bolero’, ‘Tytan’) and the inoculation (Nitragina–seeds inoculation, Nitroflora I–seeds inoculation, Nitroflora II–soil inoculation, HiStick® Lupin–seeds inoculation) on plant development, seeds chemical composition and yielding of narrow-leaved lupin. The weather conditions and experimental factors significantly influenced on productivity of narrow-leaved lupin ‘Tytan’. Drought during the growing season reduced seeds and protein yields. After inoculation of HiStck the seeds yield was significantly greater by 12.4% (p < 0.01) and the protein yield after application of Nitroflora I or HiStick by 13.9% (p < 0.01) and 19.2% (p < 0.01), respectively. Correlation coefficients showed strong relations between number of pods and seeds per plant in both cultivars regardless of the inoculation variant, however the strongest relations in both cultivar were proved on HiStick treatment.
Keyword: Biological nitrogen fixation, chemical composition, legumes, protein efficiency, yielding