Comparison of seed quality at physiological maturity and harvest maturity of two pigeon pea (Cajanus cajan L. Millsp) cultivars

Seed quality at physiological and harvest maturity of two pigeon pea cultivars viz. AL15 and T21 was compared. Seeds of both cultivars attained maximum dry weights, germination potential and seed vigor in terms of root/shoot lengths and dry weights of seedlings at 35 DAA in cv AL15 and 46 DAA in cv T21 denoting their physiological maturities. The levels of endogenous seed reserves like starch, proteins, lipids, DINA and RNA were comparable at physiological and harvest maturities. The seeds at physiological maturities i.e. at 35 DAA in cv AL15 and 46 DAA in cv T2I attained most of the required characters associated with the harvest of crop.

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Longevity and vigour of pigeon pea (Cajanus cajan (L.) Millsp.) seed stored under humid tropical ambient conditions

Acta agriculturae Slovenica ◽

10.14720/aas.2019.114.2.5 ◽

2019 ◽

Vol 114 (2) ◽

pp. 191

Author(s):

Moruf Ayodele ADEBISI ◽

Tolulope Olaitan KEHINDE ◽

Tunmise Elizabeth OLADIPO ◽

Isiaq Omoniyi LAWAL

Keyword(s):

Cajanus Cajan ◽

Seed Quality ◽

Seed Viability ◽

Pigeon Pea ◽

Quality Attributes ◽

Seed Longevity ◽

Fresh Mass ◽

Ambient Conditions ◽

Storage Duration ◽

And Storage

Seeds of 20 pigeon pea (<em>Cajanus cajan </em>(L.) Millsp.) genotypes were evaluated for seed longevity and vigour under humid ambient conditions. Cleaned seeds of each genotype were packed into a polyethylene bag, the packaged lot was electrically sealed and thereafter placed in a seed store under ambient conditions (30 ºC, RH 75 %). Seed samples were withdrawn at 0, 60, 120, 180 and 240 days after storage for seed quality parameters evaluation. The experiment consisted of two factors which were genotype and storage duration and was a laid out in a completely randomized design with three replications. Data were collected on rate of seed germination, seed viability, seedling length, seedlings fresh mass, seedlings dry mass and seedling vigour index. Data collected were subjected to analysis of variance and significant treatment means were separated using Tukey’s HSD test at 5 % probability level. PROBIT modelling was also used to predict the seed longevity of stored pigeon pea. Significant differences were observed in all seed quality attributes evaluated among the 20 pigeon pea genotypes and storage time except seedling fresh mass. Seed quality attributes decreased significantly with increasing storage periods. Genotypes NSWCC-18A, NSWCC-24, NSWC-34 and NSWCC-29A were identified to be superior for most of the seed quality attributes evaluated. PROBIT modelling result revealed that genotype NSWCC-29b had the highest storage life (16.28 months) and the highest storage potentials in terms of seed viability and other seed quality attributes of all seed lots.

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Flowering and pod and seed development in pigeon pea (Cajanus cajan)

The Journal of Agricultural Science ◽

10.1017/s0021859600075742 ◽

1990 ◽

Vol 115 (3) ◽

pp. 327-335 ◽

Cited By ~ 2

Author(s):

A. O. Togun ◽

T. O. Tayo

Keyword(s):

Seed Development ◽

Seed Yield ◽

Cajanus Cajan ◽

Pigeon Pea ◽

Field Trials ◽

Flowering Period ◽

Physiological Maturity ◽

Terminal Inflorescence ◽

Total Seed ◽

Ibadan Nigeria

SUMMARYFlower, pod and seed development were studied in the cultivars Cita-1 and Cita-2 in two field trials in 1985–86, in Ibadan, Nigeria. Flowering within any inflorescence was acropetal. On each plant the terminal inflorescence was the first to flower and, generally, inflorescences developed basipetally. A total of 569 flowers (mean of five plants) opened on Cita-1; of these, 20 were on the terminal inflorescence, 130 on axillary inflorescences and 419 on inflorescences on primary branches. For the 605 flowers (mean of five plants) which opened on Cita-2, the distribution was 19, 161 and 425, respectively.On Cita-1, 158 pods formed on average, of which 7 were on the terminal inflorescence, 33 on axillary inflorescences and 118 on inflorescences on primary branches lower down the plant. On Cita-2, for the 185 pods counted at maturity, the distribution was 8, 43 and 134, respectively. Some 72 and 69% of the total number of flowers which opened on Cita-1 and Cita-2, respectively, were aborted. In both cultivars, 99% of the mature pods were formed from flowers which opened within 24 days of the start of anthesis; the number of pods retained largely determined seed yield. The inflorescences which developed on the primary branches contributed 70% (Cita-1) and 66% (Cita-2) of the total seed yield. Early-formed pods were heavier than those formed later. Individual pods attained physiological maturity 35–42 days after successful pollination of the flower. At physiological maturity of the pod, the seed contained 3·72 % N, 0·45% P and 2·76% K, and the husk contained 1·98% N, 0·16% P and 1·96% K. The majority of open flowers which aborted were produced on primary branches, indicating that the primary branches have the greatest potential for increasing seed yield. A shorter flowering period might ensure greater retention of open flowers.

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The Development of Seed Quality in Brassicas

HortTechnology ◽

10.21273/horttech.9.3.335 ◽

1999 ◽

Vol 9 (3) ◽

pp. 335-340 ◽

Cited By ~ 3

Author(s):

David W. Still

Keyword(s):

Seed Development ◽

Seed Quality ◽

Extended Period ◽

Population Based ◽

Seed Vigor ◽

Brussels Sprouts ◽

Physiological Maturity ◽

Brassica Crops ◽

And Storage ◽

Reduced Water

Brassica crops have indeterminate growth and flower over an extended period of time. Harvested seed is therefore comprised of seed of varying degrees of physiological maturity and quality. Using population-based threshold models, broccoli (Brassica oleracea L. Group Italica), brussels sprouts (B. oleracea L. Group Gemmifera), red cabbage (B. oleracea L. Group Capitata), and rapeseed (B. napus L.) were characterized during seed development with respect to sensitivity to abiotic stress (reduced water potential) and shelf life. Using these models our data suggests that the physiological patterns of seed development are the same in all brassica crops we have tested to date. These population-based models can be used to provide a biological basis in which to evaluate cultural, postharvest and storage practices to ensure the production and maintenance of seed vigor.

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Calidad de semilla de genotipos isocitoplasmicos de sorgo (Sorghum bicolor L. Moench.)

Agronomía Mesoamericana ◽

10.15517/am.v6i0.24815 ◽

2016 ◽

Vol 6 ◽

pp. 111

Author(s):

Víctor Pecina ◽

Enrique Navarro ◽

Héctor Williams ◽

Raúl Rodríguez

Keyword(s):

Experimental Design ◽

Sorghum Bicolor ◽

Seed Quality ◽

Dry Weight ◽

Quality Traits ◽

Male Sterile ◽

Physiological Maturity ◽

A1 Cytoplasm ◽

Harvest Maturity ◽

Sorghum Bicolor L

The production of sorghum hybrids depends almost entirely on one genic-cytoplasmic sterility system (Milo-Kafir, A1 Cytoplasm), therefore its importance in increasing the diversity of the number of male-sterile sources, as the named A2 Cytoplasm. This system was introduced at the Rio Bravo Experiment Station (lNIFAP-CIRNE) in Tamaulipas, Mexico, where ge-netic material and seed production were developed. The objetive was to compare the seed quality ofthe isocytoplasmic genotypes (A1 and A2 cytoplasm). A Completely Radomized Experimental Design with Factorial Arrangement and two replications was used. The results show that there were no differences between the two types of cytoplasm (A1 and A2) for the following quality traits: volumetric weight of seeds, 1000 seeds' weight, germination(G) and seedling dry weight (SDW), through nine months of storage; whereas in vigor (G and SDW after fast aging) the A2 cytoplasm surpassed the Al cytoplasm and the same behavior was observed on the seed harvested at its physiological maturity, while at harvest maturity the Al was superior in G and SDW.

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Effect of Delayed Harvest and Fungicide Sprays on Pigeon Pea Seed Quality in Puerto Rico

The Journal of Agriculture of the University of Puerto Rico ◽

10.46429/jaupr.v63i4.10258 ◽

1969 ◽

pp. 428-435

Author(s):

M. A. Ellis ◽

H. C. Minor ◽

R. Abrams ◽

F. J. Julia

Keyword(s):

Puerto Rico ◽

Seed Germination ◽

Cajanus Cajan ◽

Seed Quality ◽

Pigeon Pea ◽

Percentage Germination ◽

Seedborne Fungi ◽

Field Emergence ◽

Pea Seed

Pigeon pea (Cajanus cajan cv. 38-Bushy) seeds were harvested at maturity and 1, 2 or 3 weeks after maturity (delayed harvests) from non sprayed plants or from plants sprayed with maneb, benomyl, or a combination of the two at four 1-week intervals beginning 110 days after planting. At each harvest date, the decrease in percentage germination and emergence and the increase in seed borne fungi was significantly less for seeds from benomyl-sprayed plants than from nonsprayed plants or those sprayed with maneb. The percentage seed germination in vitro and field emergence decreased and the percentage of internally seedborne fungi increased with each delay in harvest for all treatments. There were no significant differences in total internally seed borne fungi, germination in vitro, or field emergence between plants sprayed with maneb alone and the nontreated control. When harvested at maturity, plants of all treatments produced good quality seeds (over 85% germination).

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